RD7200™

Precision utility Cable & Pipe Locator

Operation manual

90/RD7200-OM-ENG/03
Table of Contents
Section 1 - Preface ....................................... 2 Section 8 - Fault-finding ........................... 32
1.1 Important notices ......................................... 2 8.1 About fault-finding ..................................... 32
1.2 Compliance.................................................. 3 8.2 Preparation ............................................... 32
1.3 Intellectual property ..................................... 4 8.3 How to find a fault ..................................... 33
Section 2 - Introduction ............................... 5 Section 9 - Using accessories .................. 34
2.1 About this manual ........................................ 5 9.1 About accessories ..................................... 34
2.2 About the RD7200 ....................................... 5 9.2 Headphones .............................................. 34
2.3 Extended warranty ....................................... 5 9.3 Locator clamps .......................................... 34
2.4 Manual outline ............................................. 5 9.4 Transmitter clamps .................................... 35
2.5 Safety .......................................................... 5 9.5 Transmitter external power supply............. 36
2.6 Training ....................................................... 6 9.6 Sondes ...................................................... 36
Section 3 - System overview ....................... 7 9.7 Stethoscopes ............................................ 38
3.1 RD7200 locator ............................................ 8 9.8 Submersible antenna ................................ 38
3.2 Tx-5 and Tx-10 transmitters ....................... 10 Section 10 - Appendices ........................... 40
3.3 Using the menu.......................................... 10 10.1 Care and maintenance ............................ 40
Section 4 - Operation ................................. 12 10.2 Enhanced Self-Test ................................. 40
4.1 First use ..................................................... 12 10.3 RD Manager Online................................. 40
4.2 Power on / off ............................................ 15 10.4 Warranty and extended warranty............. 41
4.3 Keypad actions & shortcuts ....................... 15 10.5 Upgrading software ................................. 41
4.4 Antenna modes.......................................... 15 10.6 eCert ....................................................... 41
4.5 System setup ............................................. 15 10.7 TX5 and TX10 locator models, operation
4.6 Dynamic Overload Protection™ ................. 17 mode and active frequencies ................. 42
4.7 Overload warning....................................... 17 10.8 TX5 Fault Find locator models ................. 42
4.8 TruDepth™ measurement ......................... 17 10.9 TX 10 Fault Find locator models .............. 43
4.9 StrikeAlert™ ................................................ 17 10.10 List of supported accessories ................ 43
4.10 Swing Warning......................................... 17
4.11 Vibration (haptic) Warnings ...................... 18
4.12 Backlight .................................................. 18
4.13 SideStepauto™ ......................................... 18
4.14 Transmitter power output ......................... 18
4.15 Transmitter Eco mode.............................. 18
4.16 Maximum Voltage .................................... 19
4.17 Measure mode ......................................... 19
Section 5 - Locating cables and pipes ..... 21
5.1 Frequencies ............................................... 21
5.2 Choice of frequency for active location ...... 22
5.3 Antenna modes.......................................... 23
5.4 Compass ................................................... 24
5.5 Trace ......................................................... 24
5.6 Pinpoint ..................................................... 24
5.7 Sweep and search ..................................... 25
5.8 Nulling Out ................................................. 26
Section 6 - Depth and current readings ... 27
6.1 TruDepth™ ................................................ 27
6.2 Verifying depth measurements .................. 27
6.3 Current readings ........................................ 28
Section 7 - Locating techniques ............... 30
7.1 Identifying target utilities ............................ 30
7.2 Signal & ground connection ....................... 31
7.3 Double-ended connections ........................ 31

© 2021 Radiodetection Ltd 1

Section 1 - Preface

Before you begin WARNING! The transmitter is capable of outputting

potentially lethal voltages. Take care when applying signals
Thank you for your interest in Radiodetection’s
to any pipe or cable and be sure to notify other technicians
RD7200™ cable and pipe locator.
who may be working on the line.
Please read this user manual in its entirety before
attempting to use the RD7200 system.
WARNING! Ensure the TX transmitter is switched OFF
Radiodetection products, including this manual, are before making a connection and before disconnection of the
under continuous development. The information direct connection lead to a service.
contained within is accurate at time of publication;
however the RD7200, this manual and all its contents
are subject to change. WARNING! Reduce audio level before using
headphones to avoid damaging your hearing.
Radiodetection Limited reserves the right to modify the
product without notice and some product changes may
have taken place after this user manual was published. WARNING! This equipment is NOT approved for use in
areas where hazardous gases may be present.
Contact your local Radiodetection dealer or visit
www.radiodetection.com for the latest information about
the RD7200 product family, including this manual. WARNING! Before removing the transmitter battery
pack, switch off the unit and disconnect all cables
1.1 Important notices
WARNING! The mains PSU supply cable is the
General disconnecting method for isolating the unit from the main
The performance of any cable and pipe locator may be supply.
affected when used in close proximity to ferrous
materials such as manhole covers, steel-toe boots and
nearby vehicles. Keep a distance of one or two meters WARNING! The battery compartment lid is the
from these objects when taking critical measurements disconnecting method for isolating the unit from the battery
such as depth and current readings. supply. The Li-Ion rechargeable battery pack (if fitted) has
an additional connector.
This instrument, or family of instruments, will not be
permanently damaged by reasonable electrostatic
discharge and has been tested in accordance with IEC WARNING! Do not position the erquipment so it is
61000-4-2. However, in extreme cases temporary difficult to disconnect the unit from each supply.
malfunction may occur. If this happens, switch off, wait
and switch on again. If the instrument still malfunctions,
disconnect the batteries for a few seconds. WARNING! Protection will be impaired if used in a
manner not specified.
Safety
WARNING! The RD7200 locator will detect most buried
WARNING! Failure to comply with safety warnings can conductors but there are some objects, including live
cause serious injury or death objects, which do not radiate any detectable signal. The
RD7200, or any other electromagnetic locator, cannot
CAUTION! Failure to comply with safety cautions can detect these objects so proceed with caution. There are also
result in damage to equipment or property some live cables which the RD7200 will not be able to detect
This equipment shall be used only by qualified and in Power mode. The RD7200 does not indicate whether a
trained personnel, and only after fully reading this signal is from a single cable or from several in close
Operation Manual. proximity.

CAUTION: The battery cover, the accessory cover and

WARNING! Direct connection to live conductors is
the headphone cover protect the locator’s sockets from
POTENTIALLY LETHAL. Direct connections to live debris and water ingress. If they get damaged or lost,
conductors should be attempted by fully qualified personnel contact Radiodetection or your local service
only using the relevant products that allow connections to representative for replacements.
energized lines.

© 2021 Radiodetection Ltd 2

Batteries For EMC and Safety compliance refer to the relevant
Technical specification document, which is available to
WARNING! Only use charging equipment provided by download from the RD7200 cable, pipe product
Radiodetection. The use of alternative chargers may cause section page in https://www.radiodetection.com/
a safety hazard and/or reduce the life of the battery.
FCC Compliance Statement
CAUTION: Do not let your battery completely discharge
as this may reduce its life or damage it permanently. If This equipment complies with Part 15 of the FCC Rules.
you are not using your equipment for a long period Operation is subject to the following two conditions:
charge it at least once a month.  The equipment may not cause harmful
interference.
WARNING! Batteries can get hot after prolonged use at  The equipment must accept any interference
full output power. Take care while replacing or handling received, including interference that may cause
batteries. undesired operation.
This equipment has been tested and found to comply
WARNING! Do not tamper with, or attempt to with the limits for a Class A digital device pursuant to
disassemble the battery packs. Part 15 of the FCC Rules.
These limits are designed to provide reasonable
CAUTION: If battery failure is suspected or if the battery protection against harmful interference when the
shows any sign of discoloration / physical damage return equipment is operated in a commercial environment.
the entire unit to an authorized repair center for This equipment generates, uses, and can radiate radio
investigation and repair. Local, national or IATA frequency energy and, if not installed and used in
transport regulations may restrict the shipment of faulty accordance with the manufacturer’s instruction manual,
batteries. Check with your courier for restrictions and may cause harmful interference with radio
best practice guidelines. communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in
Radiodetection representative will be able to direct you which case you will be required to correct the
to our authorized repair centers. interference at your own expense.

Disposal Modifications: Any modifications made to this

equipment not approved by Radiodetection may void the
This symbol on the product, accessories or authority granted to the user by the FCC to operate this
literature indicates that the product and its equipment.
electronic accessories (e.g. charger, headset,
USB cable) must not be treated as domestic Industry Canada Compliance Statements
waste, but must be disposed of professionally.
It is your responsibility to dispose of your waste ICES-003 Class A Notice:
equipment by handing it over to a designated collection This Class A digital apparatus complies with Canadian
point for the recycling of waste electrical and electronic ICES-003.
equipment. The separate collection and recycling of your
waste equipment at the time of disposal will help to Avis NMB-003, Classe A:
conserve natural resources and ensure that it is recycled Cet appareil numérique de la classe A est conforme à la
in a manner that protects human health and the norme NMB-003 du Canada
environment. For more information about where you can
drop off your waste equipment for recycling, please
Environmental
contact your local city office, your disposal service or
product supplier. WEEE, ROHS
Please dispose of this device in a manner appropriate to
the relevant legal requirements at the end of its product Manufacturing
life ISO 9001:2015
Batteries should be disposed of in accordance with your
company’s work practice, and / or the relevant laws or
guidelines in your country or municipality.

1.2 Compliance
The Declaration of conformity is available to download
from the RD7200 cable and pipe product section page
in https://www.radiodetection.com/

© 2021 Radiodetection Ltd 3

1.3 Intellectual property
© 2020 Radiodetection Ltd. All rights reserved.
Radiodetection is a subsidiary of SPX Corporation.
Radiodetection and RD7200 are registered trademarks
of Radiodetection in the United States and/or other
countries.
Trademarks and Notices. The following are trademarks
of Radiodetection: eCert, TruDepth, SideStep,
SideStepauto, Power Filters, RD Manager Online,
Peak+, StrikeAlert, CALSafe. The design of the RD7200
locators and transmitters has been registered. The
design of the 4 chevrons has been registered.
Windows is either a registered trademarks or trademarks
of Microsoft Corporation in the United States and / or
other countries.
Due to a policy of continued development, we reserve
the right to alter or amend any published specification
without notice. This document may not be copied,
reproduced, transmitted, modified or used, in whole or
in part, without the prior written consent of
Radiodetection Ltd.

© 2021 Radiodetection Ltd 4

Section 2 - Introduction
Users can opt out any time from receiving software and
2.1 About this manual technical notifications or just from receiving marketing
This manual provides underground utilities survey material.
professionals with comprehensive operating instructions
for the RD7200 locator and transmitter system. Before 2.4 Manual outline
operating the RD7200 system, it is very important that
Section 1 includes an overview of safety procedures and
you read this manual, noting all safety warnings and
notices. Review them before moving on to Section 2 and
procedures.
the rest of this manual
Additional documentation Section 3 provides an overview of the RD7200 system
with annotated diagrams of the locator and transmitter
The full product specification and RD Manager Online
manuals are available to download from Section 4 introduces basic setup and operation using the
www.radiodetection.com. RD7200 locator’s menu system.
Section 5 introduces the theory and practice of cable and
2.2 About the RD7200 pipe location using the RD7200 locator and transmitter.
The RD7200 product family offers a comprehensive Section 6 introduces depth and current readings.
range of locators and transmitters designed to meet
specific customer needs. Section 7 provides general locating tips.

The RD7200 locator is ergonomically designed to Section 8 introduces cable sheath fault-finding using the
provide the operator with a balanced, light weight tool RD7200 locator and an accessory A-frame.
that encourages extended use in most environments. Section 9 introduces the range of accessories that are
A wide range of accessories are available to enhance compatible with the RD7200 system.
the performance and to add extra functionality. Section 10 includes several appendices with reference
For more information about the Precision Locate material and other technical information.
Accessories Range, visit
2.5 Safety
www.radiodetection.com/accessories
Read this manual in its entirety before attempting to
2.3 Extended warranty operate the RD7200 locator or transmitter. Note all
safety notices in the preface and throughout this manual
RD7200 locators and transmitters are covered by a 1-
year warranty as standard. You are responsible for determining whether the
conditions are suitable for using this device. Always
Users can extend the warranty period to a total of 3 years carry out a risk assessment of the site to be inspected
by registering their products (locators and transmitters)
within 3 months from purchase. Follow your company and national safety procedures
and or requirements when operating this equipment in
To register your product: any environment or workplace. If you are unsure what
Visit portal.radiodetection.com to create your portal policies or procedures apply, contact your company or
account* and use the Product page to register your site’s occupational health and safety officer or your local
locator or transmitter. government for more information.

Visit support.radiodetection.com for instructions on Do not use this equipment if you suspect that any
how to create a portal account or register your component or accessory is damaged or faulty.
product. Before inserting the earth stake into the ground, ensure
* A valid e-mail address and mobile number are there are no shallow cables or services that could be
required. damaged by the earth stake

From time to time Radiodetection may release new Use authorized accessories only. Incompatible
software to improve the performance or add new accessories may damage the equipment or give
functionality to products. By registering the user will have inaccurate readings.
the option of subscribing to e-mail alerts advising about If you intend to uncover a sub-surface utility by digging,
any new software and special offers related to its product you must follow your company, region and country’s
range. codes of practice for excavation.
Keep this equipment clean and arrange for regular
services with an authorized Radiodetection service

© 2021 Radiodetection Ltd 5

center. More information can be found in the Appendix
or from your local Radiodetection representative.
It is important to regularly clean and sanitize products
which may become contaminated through contact with
foul water or other contaminants
Headphone use: you need to remain alert to traffic and
other hazards that are normally heard outdoors. Always
turn the volume down before plugging headphones into
an audio source and use only the minimum level,
necessary to take your measurements. Excessive
exposure to loud sounds can cause hearing damage.
Do not attempt to open or dismantle any part of this
equipment unless directed specifically by this manual.
Doing so may render the equipment faulty and may void
the manufacturer’s warranty.
You are responsible for determining whether you
consider the measurement results to be valid and for
any conclusions that are reached or any measures that
are taken as a result thereof. Radiodetection can neither
guarantee the validity of any measuring results nor can
we accept liability for any such results. We are on no
account able to accept liability for any damage which
may be caused as a consequence of the use of these
results. Please see the Standard Warranty Terms
enclosed with the product for further information.

2.6 Training
Radiodetection provides training services for most
Radiodetection products. Our qualified instructors will
train equipment operators or other personnel at your
preferred location or at Radiodetection headquarters.
For more information go to www.radiodetection.com or
contact your local Radiodetection representative.

© 2021 Radiodetection Ltd 6

Section 3 - System overview

Figure 3.1: RD7200 Locator

© 2021 Radiodetection Ltd 7

3.1 RD7200 locator Locator screen icons
16 Indicates the signal strength and Peak marker
Locator features 17 Signal strength: Numerical indication of signal
1 Keypad strength
2 LCD with auto backlight 18 Null / Proportional Guidance arrows: Indicates the
location of the line relative to the locator
3 Haptic (vibration) feedback
19 Battery icon: Indicates the battery level
4 Speaker
20 Gain readout
5 Battery compartment
21 Volume icon: Displays the volume level
6 Accessory connector
22 Radio Mode: Indicates when Radio Mode is active
7 Headphone connector
23 Power Mode: Indicates when Power Mode is active
8 Bluetooth module antenna
24 Accessory indicator: Indicates when an accessory is
9 SWING Warning system connected
10 Optional Lithium-Ion battery pack 25 A-Frame icon: Indicates when the A-Frame is
11 USB connector (inside the battery compartment) connected
26 Frequency / current / menu readout
Locator keypad
27 Antenna mode icon: Indicates antenna selection:
12 Power key : Switches the unit on and off. Peak, Null, Peak+ and Guidance Mode (model
Opens the locator menu dependent)

13 Frequency key : Selects frequency. 28 Sonde icon: Indicates that the signal source is from
Closes submenu a sonde
29 Line icon: Indicates that the signal source is from a
14 Up and down arrows : Adjusts the locator line
signal gain.
Scrolls through the menu options 30 Compass indicator: Shows the direction of the
located cable relative to the locator.
15 Antenna key : toggles Peak, Peak+, Null and
Guidance modes. 31 Transmitter standby indicator
Opens a submenu 32 Depth readout

© 2021 Radiodetection Ltd 8

Figure 3.2 Tx Transmitter

© 2021 Radiodetection Ltd 9

3.2 Tx-5 and Tx-10 transmitters
Transmitter features
1 Keypad
2 LCD
3 Removable accessory tray
4 D-cells battery holder
Figure 3.3 Tx-5 and Tx-10 signal transmitters
5 Optional Lithium-Ion rechargeable battery pack

Transmitter keypad
3.3 Using the menu
6 Power key : Switches the unit on and off.
Opens the transmitter menu The RD7200 locator and transmitter menus allow you to
select or change system options. Once entered, the
7 Frequency key : Selects frequency. menu is navigated using the arrow keys. Navigation is
Menu navigation key consistent on both the transmitter and the locator. In the
8 Up and down arrows : Adjusts the output menu the options will appear in the bottom left-hand
signal level. corner of the display. Note that when browsing the
Scrolls through the menu options locator menu, the and keys act as left and right
arrows. When browsing the transmitter menu the and
9 Measure key : Used to take voltage and
keys act as left and right arrows. The right arrow
impedance measurements.
enters a submenu and the left arrow selects the option
Opens a sub menu.
and returns to the previous menu.
Transmitter screen icons
Navigating the locator menu
10 Battery icon: Indicates the battery level
1 Press the key to enter the menu
11 Alphanumeric description of selected operation
mode 2 Use the or keys to scroll through the menu
options
12 Standby icon: Appears when the transmitter is in
Standby Mode 3 Press the key to enter the option's submenu
13 Output level: Displays transmitter output power
4 Use the or arrows to scroll through the
14 Accessory or Measurement indicators: Indicates if submenu options
an accessory is connected or if measure mode is
active 5 Press the key to make a selection and return to
the previous menu
15 DC icon: Appears when the transmitter is powered
from a DC source 6 Press the key to return to the main operation
screen
16 Induction indicator: Appears when the transmitter is
in Induction Mode
Locator menu options
17 A-Frame (Tx-5 or Tx-10 only): Indicates when the
transmitter is in Fault-Find Mode VOL Adjust the speaker volume from 0
(mute) to 5 (loudest)
18 Voltage warning indicator: Indicates that the
transmitter is outputting potentially hazardous UNITS Select metric or imperial units
voltage levels LANG Select menu language
19 Volume icon: Displays the volume level POWER Select local power network frequency:
50 or 60Hz
ANT Enable or disable antenna modes with
the exception of Peak
FREQ Enable or disable individual
frequencies
ALERT Enable or disable StrikeAlert

© 2021 Radiodetection Ltd 10

 BATT Set battery type: Alkaline, NiMH or Li-
Ion
ARROW Select NULL or proportional Guidance Transmitter menu options
(GUIDE) arrows in Peak+ mode VOL Adjust the speaker volume from 0
COMPA Enable or disable display of the (mute) to 3 (loudest)
Compass feature. FREQ Enable or disable individual frequencies
VALRT: Enable or disable vibrating handle BOOST Boost transmitter output for a specified
warnings. period of time (in minutes)
AUDIO Set audio tone frequency level high or LANG Select menu language
low
OPT F Run SideStepauto™ to auto-select a
SWING Enable or disable swing warning locate frequency for the connected
INFO Run a Self-Test, show the locator utility
software version and revision, display BATT Set battery type: Alkaline, NiMH or Li-
the date of the most recent service Ion. Select Eco mode (alkaline batteries
recalibration (CAL) or the most recent only)
eCert calibration (ECERT)
MAX P Set the transmitter to output its
Table 3.1 Locator menu options
maximum wattage.
Navigating the transmitter menu MODEL Match the transmitter setting to the
model of your locator (see Appendices
1 Press the key to enter the menu
for a list of all available models)
2 Use the or keys to scroll through the menu MAX V Set the output voltage to maximum
options (90V)
3 Press the key to enter the option’s submenu. INFO Show the transmitter software version
and revision
4 Use the or keys to scroll through the
submenu options Table 3.2 Transmitter menu options

5 Press the key to confirm selection and return to

the previous level or exit the menu

6 Press the key to return to the main operation

screen

© 2021 Radiodetection Ltd 11

Section 4 - Operation

4.1 First use On the transmitter:

To fit the D-cell batteries in the transmitter, unlatch the
Power options accessory tray. The battery compartment (see figure
RD7200 systems are shipped as standard configured to 3.2) is located underneath the transmitter body. Use the
use D cell alkaline batteries. turnkey to unlatch the battery compartment. Insert eight
D-Cell Alkaline or NiMH batteries.
Both the locator and transmitter can also be powered
using good quality rechargeable D-cell NiMH batteries or
the optional accessory Li-Ion rechargeable battery
packs. It’s important to set the correct battery chemistry
in the locator to optimize performance, see Section 4.5
Transmitters can also be powered using optional
accessory mains or vehicle power adapters. Refer to
section 10.11 for more information.

Inserting batteries
RD7200 systems are shipped with D cell battery trays.
Suitable alkaline or NiMH batteries should be fitted in the
battery compartment before your first use.
Figure 4.3 D-cell battery trays
On the Locator:
Battery status
To fit the D-cell batteries in the locator, unlatch the
battery compartment The locator and transmitter displays provide a battery
level indicator (refer to the diagrams in Section 3. When
battery replacement is necessary, the display shows a
flashing battery icon.

NOTE: The locator volume may automatically lower if set

to level 5 or 4, when using alkaline batteries and if their
charge is low. When this happens, the display will shortly
flash the ‘LOW BATT’ warning and show the reduced
volume level.

NOTE: Prolonged use of maximum volume and vibration

alerts on the locator will reduce battery life.

NOTE: Prolonged use of high power output on the

Figure 4.1 Open the battery compartment transmitter will reduce battery life.

Insert 2 × good quality D-cell batteries. Note the polarity Removing / fitting battery packs
of the cells when inserting them in the battery tray.
Locator battery pack:
1 Open the battery compartment using the release
catch (figure 4.1)
2 If using a Li-Ion battery pack un-plug the lead
connector (see figure 4.7)
3 Lift the accessory cover slightly and press the
battery retaining latch inwards

Figure 4.2 Inserting locator batteries

© 2021 Radiodetection Ltd 12

Figure 4.4 Press the retaining latch inwards
Figure 4.7 Connecting the Li Ion lead
4 Rotate the battery pack away and up from the latch
5 Repeat on the other side to release the battery pack NOTE: Fully charge your lithium-ion battery pack before
completely then lift the battery pack away its first use

Transmitter battery pack:

1 Unlatch then remove the accessory tray

Figure 4.5 Repeat then lift the battery pack away

To fit a new battery, lift both accessory covers slightly,

then gently push the replacement pack into place until it
clicks on both sides, then close the battery pack

Figure 4.8 Release then remove the accessory tray

2 Turn the release catch, then open the battery

compartment
3 Release the retaining catch (fig 4.10) by pressing
gently, then lift the battery pack away
4 Line up the battery pack clips with the corresponding
recesses on the transmitter body and press into
Figure 4.6 Installing a new battery pack place (fig 4.11)
If using the Li-ion battery pack, plug the lead into the 5 Close the battery pack, turn the retaining latch and
battery connector (fig 4.7). replace the accessory tray

© 2021 Radiodetection Ltd 13

 Charging the battery packs
WARNING! Only use charging equipment provided by
Radiodetection. The use of alternative chargers may cause
a safety hazard and/or reduce the life of the battery.

CAUTION: Do not let your battery completely discharge

as this may reduce its life or damage it permanently. If
you are not using your equipment for a long period do
charge them at least once a month.

WARNING! Batteries can get hot after prolonged use at

full output power. Take care while replacing or handling
batteries.

WARNING! Do not tamper with, or attempt to

disassemble the battery packs.

Figure 4.9: Opening the battery compartment CAUTION: If battery failure is suspected or if the battery
shows any sign of discoloration / physical damage return
the entire unit to an authorized repair center for
investigation and repair. Local, national or IATA
transport regulations may restrict the shipment of faulty
batteries. Check with your courier for restrictions and
best practice guidelines. Your local Radiodetection
representative will be able to direct you to our authorized
repair centers.

You can re-charge your batteries using the

Radiodetection mains or automotive chargers.

NOTE: The charging temperature range is 0 to 45 °C, 32

to 113°F. Do not attempt to recharge your batteries
outside this temperature range.

Locator Li-Ion battery pack

To recharge the locator battery pack, connect the battery
charger to the DC input connector on the front of the
Figure 4.10: Press the release catch and lift the battery pack battery pack.
away

Figure 4.12 Charging the locator Li-ion battery pack

Figure 4.11: Line up the battery pack and press into position

© 2021 Radiodetection Ltd 14

Transmitter Li-ion battery pack Transmitter key actions
To recharge the battery pack, remove the pack from the Key Short press Long press
transmitter and connect the transmitter battery charger.
Enter the menu Switch power off

Scroll through locate -

frequencies from low
to high
Take voltage and Take voltage and
impedance impedance
measurements using measurements at a
selected frequency standardized
frequency
Adjusts the output Select standby /
signal maximum standard
Figure 4.13 Charging the transmitter Li-Ion battery pack
power
For more information about recharging batteries refer to Table 4.2: Transmitter key actions
the instructions that came with your charger
NOTE: to scroll through frequencies from high to low,
hold while pressing the button (applies to both
4.2 Power on / off locators and transmitters)
Switch the locator or transmitter on by pressing the
key. 4.4 Antenna modes
To switch the locator or transmitter off, press and hold The RD7200 locator supports 4 antenna modes to suit
the key until the screen blanks off. your particular application or the local environment.
NOTE: The locator will automatically power off after 5 To scroll between locate modes, press the key.
minutes if no keys are pressed.
PEAK: For accurate locating, the Peak
bargraph provides a visual readout of the
signal strength. The Peak signal is found
4.3 Keypad actions & shortcuts directly over the buried utility.
PEAK+: Choose to combine the accuracy of
Locator key actions the Peak bargraph with Null arrows, which can
indicate the presence of distortion, or with
Key Short press Long press
proportional Guidance arrows for rapid line
Enter the menu Switch power off tracing – switch between them by pressing and
holding the key.
Scroll through locate
frequencies from low to GUIDANCE: Proportional arrows and a
high ballistic directional ‘needle’ combine with audio
left/right indication for rapidly tracing the
When using active In Peak+ antenna general path of a buried utility.
frequencies: mode:
Toggle Peak, Peak+, Null NULL: Provides a quick left/right indication of
Switch between the path of a utility. As Null is susceptible to
and Guidance antenna
Guidance and interference, it is best used in areas where no
modes.
Null arrows other utilities are present
In Power Mode:
scroll through Power For more information on selecting and using the various
Filters™ for improved antenna modes to assist with cable and pipe location,
discrimination of parallel refer to Section 5.
or strong power signals
4.5 System setup
Increase and decrease Rapidly increase
gain. and decrease The RD7200 locator and transmitter settings can be
gain steps in 1dB accessed via the menu. Once in the menu it is possible
RD7200 automatically to change settings according to your personal
increments
sets gain to mid-point preferences and operating requirements. Some
when pressed examples of setting changes are shown below.
Table 4.1: Locator key actions

© 2021 Radiodetection Ltd 15

Refer to the locator and transmitter menu options Power network frequency
(tables 3.1 and 3.2) for more information.
Select the correct frequency (50 or 60Hz) for your
NOTE: These procedures refer to both the transmitter country or region’s power supply on your locator.
and locator unless stated otherwise.
To change power frequency on the locator:
Before changing settings, ensure the locator or
1 Press the key to enter the menu
transmitter is switched on by pressing the key for two
seconds. 2 Scroll to the POWER menu using the or keys

Language 3 Press the key to enter the POWER menu

The locator and transmitter support a number of 4 Scroll through the power options using the or
languages. You can specify your preferred language keys
using the menu system. 5 Press the key to accept your selection and return
to the main menu
To select your preferred menu language:
6 Press the key to return to the main operation
1 Press the key to enter the menu screen
2 Scroll to the LANG menu using the or keys
Measurement units
3 Press the key (on the locator) or the key (on The RD7200 locator allows you to work in Metric or
the transmitter) to enter the LANG menu Imperial (US customary) units.
4 Scroll through the language options using the or
keys
To select your preferred units:

5 Press the key to accept your selection and return 1 Press the key to enter the menu
to the main menu. 2 Scroll to the UNITS option using the or keys
6 Press the key to return to the main operation 3 Press the key to enter the UNIT menu
screen.
4 Scroll through the measurement options using the
Battery type or keys to select METRE (for metric) or IMP
(for imperial) units
RD7200 locators and transmitters support Lithium-Ion,
Alkaline or Nickel Metal Hydride batteries. 5 Press the key to accept your selection and return
to the main menu
You should set the Locator and transmitter battery type
to match the currently installed type. This is to ensure 6 Press the key to return to the main operation
optimal performance and correct battery level indication. screen
Lithium-Ion batteries will automatically be detected by
the locator Enabling / disabling frequencies
The locator and transmitter support a wide range of
To set your battery type: frequencies and there may be times when some of these
1 Press the key to enter the menu frequencies are not used. It is possible to quickly enable
or disable frequencies using the menu system.
2 Scroll to the BATT menu using the or arrows
To enable or disable frequencies:
3 Press the key (on the locator) or the key (on
the transmitter) to enter the BATT menu 1 Press the key to enter the menu
4 Scroll through the battery options using the the 2 Scroll to the FREQ menu using the or keys
or keys.
3 Press the key (on the locator) or the key (on
5 Press the key to accept your selection and return the transmitter) to enter the FREQ menu
to the main menu
4 Scroll through the frequency options using the or
6 Press the key to return to the main operation keys
screen
5 Press the key (on the locator) or the key (on
7 If you are using the optional Li-Ion battery pack, the the transmitter) to enter the frequency
locator will automatically select the correct battery
type. 6 Scroll to OFF or ON using the or keys

© 2021 Radiodetection Ltd 16

7 Press the key to accept your selection and return 4.8 TruDepth™ measurement
to frequency menu.
All RD7200 locators use TruDepth™ to measure depth
8 If you wish to make any further changes follow steps automatically when a good quality reading can be
4 to 6. If you do not wish to make any further assured.
changes press the key twice to return to the main
operation screen. NOTE: TruDepth only indicates a locate depth when
 The locator is correctly oriented above the target
Volume control line, cable or sonde.
 The local signal conditions are assessed as be
The transmitter and locator feature an internal speaker good enough to ensure an accurate reading
to provide critical warnings and assist with cable and
pipe location. To help you orientate the locator correctly, you can use
the locator’s compass feature on the screen
To adjust audio level:
Depth readings are displayed according to your
WARNING! Muting audio on the locator will disable the preferred units of measurement.
StrikeAlert audio alarm. For more information on measuring depth, refer to
Section 6.
1 Press the key to enter the menu
2 Scroll to the VOL menu the or arrows 4.9 StrikeAlert™
3 Press the key (locator) or the key (transmitter) StrikeAlert detects the possible presence of shallow
to enter the VOL menu utilities, and warns the operator with a series of flashing
asterisks on the display and an audible alarm,
4 Scroll through the volume optioSystem Setup – characterized by a rapid warbling sound.
Volume Control ns using the or keys StrikeAlert will activate in Power and Active locate
5 Press the key to accept your selection and return modes.
to the main menu. RD7200 locators are shipped with StrikeAlert enabled by
default; this can be disabled by accessing the StrikeAlert
6 Press the key to return to the main operation
(‘ALERT’) menu and setting StrikeAlert to OFF.
screen.
StrikeAlert can also be disabled using the RD Manager
NOTE: The locator volume may automatically lower if set Online PC software. Refer to the RD Manager Online
to level 5 or 4, when using alkaline batteries and if their operation manual for further information.
charge is low. When this happens, the display will shortly
flash the ‘LOW BATT’ warning and show the reduced WARNING! Muting audio on the locator will disable
volume level.
StrikeAlert Audio alarm.

4.6 Dynamic Overload 4.10 Swing Warning

Protection™
The RD7200 locator is equipped with a Swing Warning
Dynamic Overload Protection™ (DOP) allows you to system.
locate accurately in areas with high levels of
electromagnetic interference, such as sub-stations and In order to operate the RD7200 locator properly, this
beneath high-voltage transmission lines. DOP works by must not be swinged or tilted more than a few degrees
disregarding signal spikes that would otherwise from the vertical. Swinging or tilting the locator will affect
overwhelm the RD7200 locator’s digital signal the locate and depth/current accuracy.
processor. DOP is an integrated feature of all RD7200 The Swing Warning system will alert operators of
locators. No action is required by the user. excessive swinging, to remind them to use the device
correctly
4.7 Overload warning
RD7200 locators are shipped with Swing Warning
In cases of high levels of electromagnetic interference, enabled by default; this can be disabled by accessing
the DOP will not be able to prevent the RD7200 from the Swing Warning (‘SWING) menu and setting it to
becoming overloaded. If the RD7200 becomes OFF.
overloaded, users will be alerted by a flashing mode
icon. Both the depth and current measurements will be
WARNING! Muting audio on the locator will disable
disabled in the event of an overload.
Swing Warning Audio alarm.

© 2021 Radiodetection Ltd 17

4.11 Vibration (haptic) Warnings 4.14 Transmitter power output
The RD7200 locators are equipped with a vibration The transmitter supports several power output modes to
system in the handle, providing haptic feedback to the help you select the optimal settings for your
user when an alarm is active. requirements whilst helping to prolong battery life.
The handle will vibrate to warn the user of shallow
cables/pipes, overload condition and swing warning. Adjusting power output
This is a safety feature that can be useful in noisy To adjust the power output:
environments.
RD7200 locators are shipped with Vibration Feedback 1 Press the or keys to increase or decrease
enabled by default; this can be disabled by accessing power output
the Vibration alert (‘VALRT’) menu and setting it to OFF.
Boost (Tx-10 only)
NOTE: The Vibration alert may cause the volume to Boost allows the Tx-10 transmitter to output its maximum
reduce automatically from level 5 or 4 when using output power. Boost mode can be set to operate for a
alkaline batteries and if their charge is low. specified period of time.

4.12 Backlight To configure boost:

The transmitter and locator feature a backlight to 1 Press the key to enter the menu
improve LCD visibility when required. The locator’s
backlight is controlled by an ambient light sensor and 2 Scroll to the BOOST menu using the or keys
does not require adjustment by the user. 3 Press the key to enter the BOOST menu
The transmitter’s LCD backlight is activated whenever
4 Set the BOOST duration using the or keys.
you press a key. The backlight will automatically switch
You can choose 5, 10, 15 and 20 minute periods or
off after a few minutes.
ON for continuous operation
4.13 SideStepauto™ 5 Press the key to accept your changes and exit
the BOOST menu
The transmitter can be used to recommend a general-
purpose locate frequency for the intended locate task by 6 Press the key to exit the menu
measuring the impedance of the target cable or pipe.
SideStepauto™ helps to improve locate accuracy by To enable boost:
determining the best signal. SideStepauto can also help 1 First configure the boost duration using the
to prolong battery life. procedure above
SideStepauto operates only in Direct Connection mode.
2 Press and hold the key until BOOST appears on
the transmitter LCD
Using SideStepauto
3 The transmitter will automatically exit boost mode
To enable SideStepauto: after the selected duration

Connect the transmitter to the target utility, then To disable boost:

1 Press the key to enter the menu 1 Press the key to disable boost
2 Scroll to the OPT F menu using the or keys
4.15 Transmitter Eco mode
3 Press the key to enter the OPT F menu
When using alkaline D-Cells in Tx-5 and Tx-10
4 Scroll through using the or keys until START transmitter models you can extend the effective use of
is displayed the batteries by enabling Eco mode.

5 Press the key to start SideStepauto and exit the In Eco mode the power output of the transmitter reduces
OPTF Menu when the batteries can no longer provide the required
output power.
6 Press the key to exit the menu When Eco mode is active and the power output has been
reduced, the display alternates between ‘POWER‘ and
NOTE: SideStepauto has to be enabled for each Direct the current output power level.
Connection using the START option. At any time the
user may manually change the frequency using the The transmitter will emit three beeps every time the
key power is reduced. It will then continue emitting two beeps
each minute whilst it operates at a reduced power level.
© 2021 Radiodetection Ltd 18
To enable or disable Eco mode measurements can be useful when assessing sheath
fault severity. It is also possible to measure potential
1 Press the key to enter the menu voltage that may be present on utilities to warn of
potentially dangerous or harmful voltages present.
2 Scroll to the BATT menu using the or keys
and enter it by pressing the key. In measure mode the measurement is derived from an
AC signal applied to the utility from the transmitter
3 Scroll through the battery options using the or
until ALK is displayed. Press the key.

4 Use the or until ECO is displayed and press

the key to enable Eco Mode.
Or
Select NORM and press the key to disable Eco
mode.

5 Press the key to exit the menu

4.16 Maximum Voltage

On high impedance applications such as small diameter
cables, tracer wires, etc, sometimes it can be difficult to
get a signal to flow when using the direct connection
method. Increasing the output voltage of the transmitter
can maximize the amount of signal coupled onto the
utility.
The transmitter can operate in either low voltage (30V)
or in high voltage (90V). In normal operating mode the
transmitter will operate in low voltage mode.

Warning: When operating the transmitter in high voltage

mode, always make sure that the transmitter is switched off
when connecting or disconnecting direct connection leads.

To set maximum output voltage to 90 volts:

1. Press the key to enter the menu
2. Scroll to the MAXV menu using the or keys
3. Press the key to enter the MAXV menu

4. Set the MAXV to HIGH using the or keys

5. Press the key to accept your changes and exit

the MAXV menu

6. Press the key to exit the menu

When in high voltage mode the transmitter will display a
high voltage warning triangle.
Each time the transmitter is switched off the transmitter
will revert back to the default low voltage setting.

4.17 Measure mode

The transmitter has the capability of providing
impedance measurements by determining the resultant
impedance across the crocodile clips of the Direct
Connection lead while connected to the utility. These

© 2021 Radiodetection Ltd 19

 Figure 4.13 Impedance and voltage measurements

4. To exit MEAS mode hold down the key until the

Impedance & voltage measurements display reverts back to the normal operating screen.
1. Connect the Direct Connection leads to the utility
and switch on the transmitter. Impedance measurements using
active frequency
2. Hold down the key until MEAS is displayed and
the measuring icon is activated. 1. Connect the Direct Connection lead to the utility and
switch on the transmitter.
The transmitter display will now indicate the voltage
level measured across the connection leads. 2. Select the preferred frequency and output the signal.

3. Press the key once and the display will indicate 3. Press the key once and the display will indicate
the impedance measured across the connection the impedance measured across the connection
leads. leads and also the output power of the transmitter.

The measurement icon will display the following 4. Press the key once to return to the normal
symbols: operating screen.

© 2021 Radiodetection Ltd 20

Section 5 - Locating cables and pipes
This section introduces the principals and techniques of locating buried cable and pipe utilities with the RD7200
system. For more information on the theory of cable and pipe location, refer to The theory of buried cable and pipe
location which is available to download from www.radiodetection.com

1 Switch the transmitter off

5.1 Frequencies
2 Connect the Direct Connection lead into the
The RD7200 locator supports a range of active and transmitter accessory socket
passive frequencies.
3 Clip the red connection lead to the utility ensuring
For a complete list of supported frequencies, refer to the that the area around the connection is clean and that
RD7200 Locator Specification datasheet. a positive connection is achieved

Passive frequencies 4 Clip the black connection lead as far away as

possible and at 90° to the ground stake or suitable
Passive frequency detection takes advantage of signals ground point nearby ensuring that a positive
that may be present on buried metallic conductors. connection is achieved
Dependent on the model, RD7200 locators support up to
three types of passive frequencies: Power, Radio and 5 Switch the transmitter On
CPS signals. 6 The display will show the Direct Connection lead
You can detect these frequencies without the aid of a connected icon
transmitter if they are present on the utility you are
surveying.

Power Filters™
The RD7200 locator allow you to take advantage of the Figure 5.1 Direct Connection lead icon
harmonic signals found on power networks. For more information about other signal connection
When strong or interfering power signals are present, accessories, refer to Section 8.
accurate tracing of a target cable can be challenging.
Power Filters™ allow you to establish if a single large WARNING! Direct Connection to live conductors is
power signal comes from one source or from the POTENTIALLY LETHAL. Direct connections to live
presence of multiple cables. The different harmonic conductors should be attempted by fully qualified personnel
characteristics of the detected lines can then be used to
only using the relevant products that allow connections to
trace and mark their route.
energized lines.
Once in Power Mode, press the key to switch out of
Radiodetection’s sensitive Power Mode and scroll WARNING! The transmitter is capable of outputting
through the five individual Power Filters. potentially lethal voltages. Take care when handling the
The use of an individual Power Filter harmonic can also terminals, connection leads and ground stake, notify other
allow you to locate power lines in situations where the technicians working on the line of the hazard and guard
total signal would otherwise be too large. exposed conductors to prevent accidental contact.

Active frequencies
WARNING! Ensure the TX transmitter is switched OFF
Active frequencies are applied to a buried conductor before making a connection and before disconnection of the
using the transmitter. The transmitter can apply a signal direct connection lead to a service.
using three methods:
Induction
Direct Connection
In this mode of operation the transmitter is placed on the
In Direct Connection, you connect the transmitter output ground over or near the survey area. If a Direct
directly to the utility. The transmitter will then apply a Connection lead or signal clamp is not plugged into the
discrete signal which you can locate using the locator. transmitter, it will automatically go into induction mode.
This is the preferred method of applying a transmitter In this mode, only frequencies applicable for induction
signal to a utility and in the majority of applications will
apply a stronger signal to the utility, which may increase mode will be made available as the key is pressed.
the locate distance. Once activated the transmitter will induce the signal
To directly connect to a non-energized conductive utility: indiscriminately to any nearby buried conductors.

© 2021 Radiodetection Ltd 21

Please note that these signals will also be airborne and This medium frequency is the most useful general-
it is advisable to keep the distance between the purpose signal, high enough for induction, outside the
transmitter and locator at least 10m / 30’ – this distance power frequency interference band, and with limited
may need to be increased, particularly if depth coupling to wanted lines however it may not be high
measurements are taken. enough to impose a strong signal on small diameter line
like telecom cables.
Signal clamp 33kHz
An optional signal clamp can be connected to the
transmitter and clamped around a cable or pipe to apply
the transmitter signal. This method of applying the
transmitter signal is particularly useful on insulated live
wires and removes the need to disconnect the supply to
Figure 5.4 33kHz active signal
the cable. Clamps are available up to 8.5” / 215mm in
diameter. This higher frequency is easily applied by induction to
most lines, so is very useful for initial search. It travels
WARNING! Do not clamp around uninsulated live on small diameter line however it couples more easily to
conductors unwanted lines, and loses its strength over shorter
distances than lower frequencies.

WARNING! Before applying or removing the clamp 100kHz and Over

around a power cable, ensure that the clamp is connected
to the transmitter at all times.

Figure 5.5 100kHz active signal

5.2 Choice of frequency for
This very high frequency range deals with the difficult
active location cases – induction onto small diameter lines in dry sandy
The choice of signal frequency is an important factor for soil, and short lengths of cable. It is very easy to apply
effective tracing and identification of buried lines, and by induction however it couples very easily to unwanted
there is no single frequency that covers all conditions. lines, and does not travel far.
For simple instruments to be used by relatively non-
technical personnel, there is no option but to make a
compromise, and choose a single frequency high
enough to give good performance in the induction mode,
Selecting frequencies
but not so high that it will couple too easily into unwanted It is important to select the correct or appropriate
lines. Active signals between 8kHz and 33kHz are frequency for your particular application. For more
commonly used for these applications. For more information see “The theory of buried cable and pipe
comprehensive equipment for problem-solving by location”, which is available as a free download from
technically competent technicians, a range of www.radiodetection.com
frequencies may be provided. Typical examples of these
and reasons for their use are illustrated below. To select a frequency on the locator:

512Hz 1 Press the key to cycle through available

frequencies

2 Alternatively, hold down the key and press the

or keys to cycle up or down the range of
frequencies
Figure 5.2 512Hz active signal
If locating using an active frequency you must also set
This low frequency is most useful for line tracing and your transmitter to output the matching frequency.
identification over long distances. It does not couple
easily to unwanted lines however it is too low for You can change your transmitter’s output frequency
induction, and it falls within the band of power frequency manually using your transmitter’s keypad.
harmonic interference.
To manually select a transmitter output
8kHz
frequency:
1 Press the key to cycle through available
frequencies

NOTE: Some frequencies require that you connect an

Figure 5.3 8kHz active signal accessory, for example an A-Frame, before the
frequency is available.
© 2021 Radiodetection Ltd 22
5.3 Antenna modes 2 Scroll to the ARROW menu using the or keys

The RD7200 system supports up to four antenna modes, 3 Press the key to enter the ARROW menu
exclusively dedicated to locating cable and pipes, and to
4 Select NULL or GUIDE using the or keys
suit your particular application or the local environment.
These are: 5 Press the key twice to return to the main locate
 Peak mode menu.

 Peak+ mode When using Guidance arrows:

 Guidance mode Use the proportional arrows to guide the locator along
 Null mode the path of the target cable or pipe. To accurately locate
the center point of the target utility, for example to mark
a point or take a survey measurement, use the Peak
Peak mode bargraph to pinpoint the Peak position.
Peak mode provides the most sensitive and accurate
mode for location and depth measurement. It provides a When using Null arrows:
sharp Peak response with a corresponding small
Use the arrow heads to place the locator above the
decrease in sensitivity. Peak mode cannot be disabled
NULL point. If the Peak response is not at a maximum
using the menu.
then this is evidence of a distorted field. If the Peak
In Peak mode the following indicators are displayed by response is at its maximum level where the Null point is
the LCD: located then there is no or very limited distortion present.
 Depth In Peak+ mode the following indicators are displayed by
the LCD:
 Current
 Right and left arrows
 Signal strength
 Signal strength
 Compass
 Compass
To select Peak mode:  Current

1 Press the key until the Peak mode icon is  Depth

displayed on the LCD
To select Peak+ mode:
NOTE: The depth and current values will display
automatically, although these values should not be 1 Press the key until the Peak+ mode icon is
considered accurate until the locator is directly over the displayed on the LCD
target line.
Guidance mode
Peak+™ mode Guidance mode offers good performance in distorted
Peak+™ mode combines the accuracy of the Peak fields and provides three indicators to guide the user
bargraph with a choice of Guidance or Null directional towards the target line.
arrows. The Left and Right Proportional Arrows become shorter
Guidance arrows provide visual indication of the as the locator approaches the target, and the Target
direction to the target utility, and are designed to get you Position Needle will move towards its central position.
close to the Peak position faster, before using the Peak The Signal Strength reading will also reach its maximum
bargraph to pinpoint the target utility, value when the locator is positioned above the target.

Using Null arrows allow you to check for distortion before Any deviation from all three indicators showing the target
marking a point, and should be used when accurate position in the same location could signal the presence
locate measurements are required. of a distorted field.
In Guidance mode the following indicators are displayed:
Switching between arrow types:
 Proportional left and right arrows
When in Peak+ mode, press and hold the key to
 Target Position Needle
toggle between Guidance and Null arrow types.
 Signal strength
You can also select the default arrow type in the locator
menu:  Gain
1 Press the key to enter the menu  Compass

© 2021 Radiodetection Ltd 23

  Current
 Depth Set the locator sensitivity to approximately 50% by
pressing the or key
To select Guidance mode:
NOTE: it may be necessary to adjust the sensitivity level
Press the key until the Guidance mode icon is throughout the pinpointing to keep the bar graph on
displayed on the LCD scale.

Null mode 1 With the antenna perpendicular to the line, make

traverses across the line. Define the point of
Null mode is used to verify a locate signal in maximum response.
environments with limited or no interference or distortion.
Null mode gives a null response when it is directly over 2 Without moving the locator, turn it round as if it is on
the line. a pivot. Stop at the point of maximum response.

In Null mode the following indicators are displayed by the 3 Hold the locator vertical with the antenna just above
LCD: the ground and move the locator from side to side
across the line. Stop at the point of maximum
 Signal strength. response.
 Compass. 4 With the end of the antenna close to the ground,
repeat steps 2 and 3.
 Right and left arrows.
5 Mark the position and direction of the line.
To select null mode: Repeat the steps of the procedure to increase pinpoint
accuracy.
1 Press the key until the null mode icon is
displayed on the LCD If using Peak+ mode, switch to null arrows by pressing
and holding the key. Alternatively switch to Null
The sharp, null response can be easier to use than the
antenna mode.
Peak response but is vulnerable to interference and
should not be used for locating, except in areas where Move the locator to find the Null position. If the position
there is no interference present. of the Peak and the Null pinpoints correspond, it can be
assumed that the pinpoint is accurate. The pinpoint is
Guidance Mode offers improved performance in such not precise if the marks do not correspond, but both
conditions while Peak+ mode can combine the Peak
marks will show an error to the same side. True line
bargraph with Guidance arrows to combine fast and
position will be close to the Peak position.
accurate locate tools.
The line lies half the distance to the other side of the
5.4 Compass Peak position as the distance between the Peak and the
Null positions.
The LCD compass provides a visual indication of the
direction of the target cable, pipe or sonde. The compass
is available for all frequencies apart from Power, Radio
and Passive.

5.5 Trace
Line tracing can be accelerated by switching the locator
to Guidance mode.
Move the locator left and right while walking along the
path of the line to place the target position Needle
directly over the line. As you move the locator over the
line, the left and right arrows (and an accompanying Figure 5.2: Pinpointing a target line
tone) will indicate if the target line is to the left or right of
the locator.

5.6 Pinpoint
Locating a target line in Peak, or Peak+, mode
accurately defines the position of a target line after it has
been traced and its position is approximately known.
Start with medium output power from the transmitter,
medium frequency on the transmitter and locator, and
Figure 5.3: Pinpointing with Peak and Null indicators
Peak or Peak+ mode on the locator.

© 2021 Radiodetection Ltd 24

 requires a transmitter and locator and two people. This
5.7 Sweep and search type of search is referred to as a ‘two person sweep’.
There are a number of techniques available for locating Before starting the sweep, define the area of search and
unknown lines in an area. Using these techniques is the probable direction of lines crossing the area. Ensure
particularly important before conducting any excavation the transmitter is switched on in induction mode.
work to help ensure that buried lines are not damaged.

Passive sweep
A passive sweep is used to locate Power, Radio or CPS
signals that may radiate from buried conductors.

To perform a passive sweep:

1 Press the key to select the passive frequency you
wish to locate. You can select from the following
passive frequencies (model dependent):
 Power
 Radio
 CPS (Cathodic Protection System)
2 Adjust the sensitivity to maximum; reduce the
Figure 5.5: Inductive search
sensitivity to keep the bar graph on scale when there
is a response. The first person operates the transmitter and the second
person operates the locator. The transmitter induces a
3 Traverse the area in a grid search, at a steady walk,
signal onto lines as it passes over them and the lines are
and hold the locator comfortably with the antenna in
then detected with the locator at a suitable distance
line with the direction of movement and at right
away from the transmitter (around 15 meters / 50 feet –
angles to any lines that may be crossed.
although this will depend upon the level of induction
power used.)
Hold the transmitter with its length aligned with the
assumed direction of any lines.
The second person holds the locator at the start of the
area to be searched and with the locator antennas at
right angles to the probable direction of the buried lines.
Set the locator sensitivity level as high as possible
without the locator picking up any airborne signals
directly from the transmitter.
Figure 5.4: Passive sweep
When the transmitter and locator are in line both
Stop when the locator response rises to indicate the operators start to move forward in parallel. The operator
presence of a line. Pinpoint the line and mark its position. with the locator sweeps it backwards and forwards,
Trace the line out of the area being searched. Resume keeping the locator vertical, as they proceed in parallel
grid search in the area. with the transmitter. This method allows for
misalignment of the transmitter, locator and buried line.
In some areas there may be a confusing amount of 50 /
60Hz power signals. Lift the locator 50mm / 2” from the The transmitter applies the strongest signal to the lines
ground and continue the sweep, or use the key to directly below it, which are then located with the locator.
switch from Power mode and use Power Filters to Move the transmitter from side to side to establish the
discriminate individual lines. highest signal which indicates that the transmitter is also
directly above the line(s).
Switch the locator to Radio Mode. Increase sensitivity to
maximum and repeat the above grid search procedure Mark the ground at the point of each Peak signal
over the area. Pinpoint, mark, and trace out any lines detected with the locator. Repeat the search along any
that are located. other possible paths of lines. Once the positions of any
lines have been marked, reverse positions, place the
In most, but not all areas, radio mode will locate lines transmitter over and along each line in turn, and trace
that do not radiate power signals and a grid search the line out of the search area.
should be made in both power and radio modes.

Inductive search
An inductive search procedure is a more certain
technique for locating unknown lines. This type of search

© 2021 Radiodetection Ltd 25

5.8 Nulling Out
One person Nulling Out technique:
Sometimes it is possible for some utilities to be masked
by other utilities and this can happen when one or more
utilities are in close proximity to each other or when
stronger signals may radiate. In certain applications and
congested areas the ‘Nulling’ technique allows operators
to eliminate the induction signal directly beneath the
transmitter but at the same time induces the transmitter
signal onto other nearby utilities that previously have not
been able to be located

Figure 5.6 Nulling Out - Single person sweep

1. Lay the transmitter on its side using the side

support arm.
2. Sweep the area around the transmitter with the
receiver at least 10m/30’ from it.
3. Reposition the transmitter at 5m/15’ intervals
around the area and repeat step 2
Figure 5.6 Nulling Out effect
4. Stop when there is a response
Two persons Nulling Out technique:
5. Pinpoint and mark any lines
1. Place the transmitter close to the services you
wish to trace (a parallel sweep may be used for 6. Trace the lines out of the area
this) and using the locator at a distance of
approximately 10m/30’ from the transmitter,
pinpoint the strongest signal.
2. The sensitivity on the locator is adjusted so that
the bar graph response is approximately 75%
3. Release the side support arm.
4. With the locator over the centre of the signal
the second operator should hold the transmitter
at waist level, with the transmitter on its side –
release support arm pointing down.
5. The transmitter is then moved from side to side
to find the ‘Null’ spot between two detectable
signals; the transmitter should then be lowered
towards the ground keeping it in the ‘Null’ spot.
6. At ground level we are ideally looking for a
‘Null’ no wider than 50mm/2” (Sensitivity on the
locator may need to be adjusted to achieve
this).
7. With the transmitter left on the ground in the
‘Null’ spot. The locator is used to check for
additional signals either side of the ‘Nulled’
signal.
8. Should the ground be uneven the transmitter
may be turned across the line of the service
provided the release support arm remains
facing downwards. (this will improve the
stability of the unit)

© 2021 Radiodetection Ltd 26

Section 6 - Depth and current readings

6.1 TruDepth™
The RD7200 locator provides automatic depth of buried
cables, pipes and sondes and when the locator is
correctly orientated above the target line or sonde.
Current readings are also displayed simultaneously if the
locator is orientated correctly (feature not available in
sonde or passive frequency modes).
Depth and current readings are automatically displayed
simultaneously, but if the locator is not correctly
orientated neither reading will be displayed.
Depth range and accuracy vary depending on the Figure 6.1: Taking a depth reading
makeup and type of target utility (e.g. cable, pipe or
sonde), its depth and external environmental factors like To minimize signal distortion, do not apply the signal by
electromagnetic noise, ground conditions and induction. If Direct Connection or signal clamping is not
interference. possible, place the transmitter in induction at least 15m
(50ft) from the point of any depth measurements.
WARNING! The accuracy of depth measurement is Depth measurements may not be accurate if there is
subject to a number of factors and is meant as a guide only. audible interference or if part of the transmitter signal has
Never use the depth measurement to define mechanical coupled to a nearby line.
digging depths. Always follow local safe digging guidelines. Confirming the Peak position coincides with a Null
position indicates that the position is suitable for making
The depth measurement is to the center of the pipe, a depth estimate.
cable or sonde. The best readings are typically detected
from ‘active’ signals output by a transmitter rather than
from passive sources.
The RD7200 locator is capable of determining cable
depth when locating some passive power signals.
However passive signals on lines are less suited for
measuring depth because accuracy can be Figures 6.2: Depth readings
compromized by interference- e.g due to the passive  Pinpoint the target line accurately with the locator
signal being present on more than one line.
 Check the locator is directly over the line, the
antennas are at right angles to it and the locator is
WARNING! Do not make depth measurements near
vertical. Adjust the sensitivity level to bring the bar
bends or tees in the line. Go at least 5m (16ft) from a bend graph indication to approximately 50%
for best accuracy.
If the ground appears to radiate a strong field, perhaps
near a radio station, check depth by holding the bottom
TruDepth for buried conductors or of the antenna 50mm (2”) above the ground and subtract
sondes this reading from the indicated depth.

TruDepth and Compass 6.2 Verifying depth

It is important to note that the RD7200 locator will only measurements
display depth and current (in applicable modes) when
the locator is correctly orientated above the target line, Check a suspect or critical depth reading by lifting the
cable or sonde. To ensure the locator is correctly locator 50mm (2”) above the ground and repeating the
orientated, use the Compass feature. measurement. If the measured depth increases by the
same amount it is a good indication that the depth
When locating lines, make sure the Compass display is reading is correct.
in the North / South orientation position.
When locating for a conductor or sonde, depth
When locating sondes (see Section 8.5), make sure the measurements should be precise to ±3% if conditions
Compass display is in the East / West orientation. are suitable. However, you may not always know if the
conditions are suitable so the following techniques
should be used to check critical readings:

© 2021 Radiodetection Ltd 27

 Check that the route of the line is straight for at least
2 meters (6 ft) to either side of the measurement
point. Method 2
 Check that the signal response is reasonably 1 Apply a signal to a cable or pipe of known depth.
constant over the 15 meter distance to the
2 Locate the cable or pipe; the locator will display
transmitter and make depth measurements to either
depth on the LCD automatically.
side of the original point.
3 Compare the depth reading on the locator with the
 Check that there are no adjacent lines carrying a
actual depth.
significant signal within 1 to 2 meters (3 to 6 ft) of the
target line. This is the most common source of error
NOTE: The accuracy of depth measurement is subject
of depth measurements as a strong signal coupled
to a number of factors and is meant as a guide only.
to an adjacent line can often introduce ± 50% error.
Exercise caution when performing any excavation.
 Make several depth measurements at points slightly
displaced from the line’s apparent position. The
shallowest indication will be the most accurate and
6.3 Current readings
will also indicate the line’s position most accurately.
Identifying a utility using current
Checking depth accuracy measurements
This paragraph describes several quick and easy ways Measuring current value on a line helps confirm the
of verifying that the depth reading on the locator when identity of the line and may provide information about the
used for markers or conductors and sondes is within condition of cable insulation or pipe coating.
acceptable limits.
Refer to this if you are getting inaccurate depth readings
About current measurements
from a cable or pipe for which you know the approximate The transmitter applies a signal or current onto a target
depth. Inaccurate depth readings could be the result of line. The current decreases in strength as the distance
the locator picking up a stronger signal such as another from the transmitter increases. This rate of decrease
cable or pipe running in close parallel to the target pipe depends on the type of line and on soil conditions.
or cable. Regardless of the type of line and the frequency being
There are two ways of checking the calibration of the used the rate of decrease should be regular with no
locator in the field. Both methods require the use of a sudden drops or changes. Any sudden or abrupt current
transmitter: change indicates that the line or its condition has
changed.
Method 1
Place the transmitter on top of a non-metallic object, 18”
/ 500mm in height or more, on the ground and away from
any buried lines. Switch the transmitter on in induction
mode. Hold the locator with the blade horizontal and
pointing towards the front of the transmitter and
approximately five meters from the front of the
transmitter.
1 Switch the locator on.
2 Select the same frequency as is selected on the
transmitter but make sure that this frequency is in
the sonde mode.
3 Move the locator from left to right and when the
bargraph reading is at its Peak note the depth as
indicated on the locator. Measure the distance from
the base of the locator to the center of the transmitter
using a tape measure.
Figure 6.3 Current readings
4 Compare this reading with the depth reading on the Figure 9.3 current readings
locator.
In congested areas, where there is more than one line,
The locator can be considered accurate if the difference the locator may sometimes detect a stronger signal from
between the depth reading on the locator and the an adjacent line to which the signal has coupled or
distance measured with the tape is less than 10%. shares common grounding because it is nearer the
surface. Although current measurement compensates

© 2021 Radiodetection Ltd 28

for depth, signal response will be less as the depth
increases.
The line with the highest current measurement, rather Signal current measurements
than the line giving the strongest response, is the target Pinpoint the line and confirm the accuracy of the Peak
line to which the transmitter signal has been connected. pinpoint with null arrows. Check the locator is directly
Measuring current provides useful information about the over the line, with the antennas at right angles to it and
position of bends and intersections. Measuring current vertical.
after a tee will indicate the main line that pulls more The locator will automatically estimate and display depth
current along its greater length. on the LCD.
A signal coupled to a nearby line may distort the
accuracy of the measurement. If the accuracy of the
reading is suspect, sweep the area to check if other
nearby lines are radiating the signal. If other signals are
causing interference, it may be necessary to make the
current measurement at another point along the line.
Both antennas are needed to make a current
measurement and locator accessory antennas such as
a normal clamp or stethoscope cannot be used.
Because current measurement is a function of depth, it
is only available in active locating modes.

Figure 6.7: Current readings using transmitter signals

Figures 6.4 – 6.6 Taking current readings

Applying a transmitter signal

The transmitter signal can be connected, clamped or
induced to the target line in the same way as the signal
for line tracing is applied.

WARNING! Direct Connection to live conductors is

POTENTIALLY LETHAL. Direct Connections to live
conductors should be attempted by fully qualified personnel
only using the relevant products that allow connections to
energized lines.

© 2021 Radiodetection Ltd 29

Section 7 - Locating techniques

7.1 Identifying target utilities  Return signal flowing on another line. Use a double-
ended connection to by-pass the ground return if
possible
Induction
 Choose a signal application point where the line is
If several conductors are running in parallel, and it is not furthest from other lines and not in a congested
possible to connect a transmitter, each line may be area
located separately. Proceed as follows:
 When using single-ended connection, site the
1 Perform a sweep of the area to find the position and ground stake as far from the target line as possible
number of conductors in the area. and away from other buried lines
2 Map the direction in which the conductors are going.  Avoid using existing structures for ground
connections; other buried lines may be bonded to
To trace the lines: them
1 Select induction mode on the transmitter.  A bad ground connection or just laying the ground
2 Select the same frequency as on the locator. lead on the surface at right angles to the line may
result in less coupling than a good ground provided
3 Place the transmitter on its side and in line with a long distance tracing is not required.
conductor
4 Ensure the conductor is directly below the
transmitter
5 This will ‘null out’ the signal directly below the
transmitter, placing no signal on that conductor, and
enable the other conductors to be located
6 Locate each conductor and mark its position
7 Move the transmitter down the route and continue
locating and marking.
8 Trace each conductor out of the search area until the
target can be accurately located.

Unwanted signal coupling

Unwanted coupling of the signal from the target line to
another nearby line is one of the most common location
problems. It leads either to an error in the marked
position and depth of the target line or to marking the
wrong line. A certain degree of coupling is unavoidable
in many situations but there are ways in which a careful
user can reduce coupling and increase location
reliability.
 Avoid applying the signal by induction. The signal
may be coupling to more than one line directly from
the transmitter. Use the signal clamp where
possible.
 Identify points where lines may be bonded or in
close proximity to each other. Work toward these
points rather than away from them. For example, if
gas and water pipes are bonded within a building,
apply the signal at the valves or access points in the
road rather than in the building.
Figures 7.1 – 7.4: Nulling utilities & interference from services
 Reduce coupling to a parallel line by using a low
signal frequency where available

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7.2 Signal & ground connection
7.3 Double-ended connections
Manhole covers
Large diameter water pipes and gas distribution pipes
Sometimes when locating, it is not possible to insert the that are laid in sections sometimes have insulated joints
ground stake into the earth, for example, when locating between the sections and can be difficult to locate using
on hard ground such as roads. In this case, the ground a single ended connect. This is because when using a
return can be made by attaching the ground lead to the single ended connection ground return, signals can often
metal frame of a manhole. cause confusion by returning to the transmitter along
other lines. The problem sometimes occurs when return
Using lighting columns signals appear stronger than on the target line, usually
because the target line is deeper than the line carrying
Direct Connecting to a metal, street-lamp column is
the return signal, or the return path may be a better
almost as effective as connecting to the cable sheath
electrical conductor than the target line.
itself. Normally the cable sheath is bonded to the metal
column, therefore a simple connection onto the column Applying a double-ended transmitter connection is a
enables the user to locate the street lighting quickly and useful technique for positively tracing and identifying a
safely without having to call out a technician from the target line in a situation such as a heavily congested
lighting company. industrial site, provided there are access points at each
end of the line.
If the lighting column is made from concrete make the
transmitter connection to the cable sheath unless the
cable is earthed to the inspection doorframe. Connection Making a double-ended connection
to the cable sheath applies the transmitter signal for a Connect the transmitter to an access point on the target
considerable distance enabling the locator to trace line. The transmitter ground is connected with a long
cables feeding illuminated street furniture as well as cable to another access point further along the line. A
other street lights. complete circuit is achieved without using ground as a
current return path. The long cable should be kept as far
WARNING! The live cable connector is for use only by away as possible from the expected route of the line.
operators licensed or permitted to work on live cables. This method of applying the transmitter signal is ideal for
positive identification of a target line. When a connection
The use of a street light column as a means of applying has been made to two points on the same line, the same
a signal to other power cables on the same electric level of current should be detectable around the circuit.
circuit is a possibility. The signal may be weak using this The locator display should remain constant if the depth
method because it may have travelled some distance of the line does not change.
back to the sub-station and out again on the other
system. With the locator used on a high sensitivity
setting it is often possible to locate a cable, which would
otherwise have been difficult or inconvenient to energize
with the transmitter signal.

Finding a good ground point

When using a Direct Connection, it is important to get
the best possible grounding for the transmitter. This
provides the lowest resistance ground path and the best
output signal. If it is not possible to use the ground stake Figure 7.5: Making double-ended connections
the following are examples of good alternative ground
points:
 Metal manhole covers
 Metal drainage grates
 Metal railings
 Metal fence posts

© 2021 Radiodetection Ltd 31

Section 8 - Fault-finding

8.1 About fault-finding Reference readings

It is good practice to obtain a reference reading from the
The RD7200 locator is capable of locating cable to
ground stake before you attempt to locate a fault on a
ground faults caused by damaged cable sheaths and
target line. Reference readings help to provide the
can also be used to locate damage to insulation on
following information:
pipelines. This process is known as Fault-Finding and
uses specific fault find signals applied to the target.  Severity of fault
Fault find signals can only be applied using Direct  Survey interval
Connection method.
Before taking the reference reading set up the
The A-frame accessory is used to locate cable sheath transmitter and locator as follow:
faults on power and telecom cables or insulation faults
on pipelines. To use Fault-Find you will need the On the transmitter:
following equipment:
1 Select a fault-finding frequency using the key
 RD7200 locator
 Tx-5 or Tx-10 transmitter 2 Use the or keys to increase or decrease the
output signal level
 Accessory A-frame with connecting lead
3 If required you can use the BOOST setting if the fault
 Direct connection lead and earth stake is located on a high resistance cable or if the cable
is long
There are 2 types of signals that can be used for fault
finding:
WARNING! By selecting 8KFF the transmitter will have
 8K Fault Find – useful for sheath faults on cables
the ability to output high voltages and a high voltage warning
but can also be used on pipelines over shorter
distances. icon will appear on the transmitter’s LCD.

8.2 Preparation On the locator:

Using RD7200 standard locating techniques locate the 4 Connect one end of the connection lead to the A-
cable or pipe for a short distance and trace and mark its frame socket
route. Remove all earth bonds from the line to be traced 5 Connect the other end to the locator accessory
during the fault-finding survey. If there are any earth socket
bonds along the path the fault find signal may direct the
user to this location as this will be the preferred path for 6 The locator will automatically recognize the A-frame
the fault find signal to leak away into the ground and may and display the A-frame icon on the LCD
result in the fault not being located.
7 Select a fault-finding frequency using the key
Connecting the transmitter Obtaining a reference reading:
1 With the transmitter switched off connect the Direct Position the locator approximately 2m (6 feet) from the
Connection lead into the transmitter accessory ground stake and push the A-frame spikes into the
socket ground with the green spike towards the ground stake
2 Clip the red connection lead to the cable, cable Attach the locator to the A-frame by the retention hook.
sheath or pipe ensuring that the area around the (If you are holding the locator separately, make sure that
connection is clean and that a positive connection is the locator is in line with the A-frame and is pointing
achieved towards the green spike.) The fault direction arrow
3 Extend the black connection lead as far away as should be pointing away from the ground stake. If it is
possible at 90° to the probable route of the target not, make sure that the transmitter is connected correctly
cable and clip the connector to the ground stake (red connector to the cable and black to the ground
ensuring that a positive connection is achieved stake).
Take the dB reading and keep it for reference. If there is
NOTE: Always connect the black connection lead to a a single fault on the cable, it will be approximately the
ground stake and not a water pipe or buried cable, as same dB value as the reference reading.
these may carry the signal.

© 2021 Radiodetection Ltd 32

NOTE. To establish how often to take readings on the using the fault find signal during a Fault-Find survey,
cable or pipe, move away from the ground stake and press the key once and the locator will switch to
take further readings until the arrow has difficulty in Peak locate mode. To use alternative antenna modes,
locking and the dB reading is low. Measure the distance
press the key to step through available antenna
that the locator is now away from the ground stake. This
modes. To get back to fault find mode step through all
is the distance that you can safely use between taking
available antenna modes until the locator goes back to
readings on the cable or pipe to ensure that you do not
fault find mode.
miss the fault.
Note: While the A-Frame is connected to the locator,
8.3 How to find a fault depth and current measurements will not be available. If
depth or current measurements are required, remove
Starting from the transmitter, walk along the cable or the A-Frame lead from the locator.
pipe route pushing the A-Frame spikes into the ground
with the green spike pointing away from the transmitter. As a fault is approached the Fault-Find direction arrow
Where there are no faults the dB reading will be low and will lock on to the fault signal, point forward and the dB
the direction arrow may flicker forward and back. readings will increase. When the fault is passed the
arrow will point back towards the transmitter. Take
NOTE: Flickering arrows may also indicate that you may readings at smaller survey intervals to determine the
be too far away from the fault or ground stake (or both) exact point of the fault.
for the locator to lock on.
When the A-frame is directly over the fault the dB
reading will drop as shown opposite.

NOTE: The values given are for illustration purposes

only and may not be the same as those obtained in other
situations.

To pinpoint the fault, turn the A-frame 90° to the cable or

pipe and Fault-Find until the exact point is found. Where
the arrow direction changes the center line of the A-
frame is now directly over the fault.
Mark the ground to show the position of the fault. Find
the maximum dB reading in front of the fault by pushing
Figure 8.1: Cable sheath fault-finding the A-frame into the ground at small intervals. Note the
If you are trying to locate high resistance faults or there dB reading. If the reading is approximately the same as
is a long distance between faults, carry on with the the reference reading, you can assume that there is only
survey and the locator will lock on when you get closer one fault. If the reading is less than the reference
to the fault. reading, keep surveying the cable for other faults.

NOTE: If the cable or pipe runs under a road, use the

equipment as normal on the road surface as it can
sometimes detect signals when working on blacktop,
concrete, or paved surfaces. If necessary, try wetting the
road surface. Pouring a very small amount of water
around the bottom of the A-frame spikes before each
Fault-Find will generally ensure a good ground
connection.

NOTE: If the cable or pipe runs under a paved surface,

the fault can often be pinpointed by fault finding in the
grass / soil adjacent to the paving. Reduce the distance
Figure 8.2: Locating faults with the locator and A-frame between placing the A-frame spikes in the ground to
Take readings at the survey intervals determined by the allow for the increased distance to the actual fault
reference reading. To locate the cable or pipe while position.

© 2021 Radiodetection Ltd 33

Section 9 - Using accessories

9.1 About accessories  A cable or pipe is accessible at an inspection hole or

manhole.
Both the transmitter and locator are compatible with a
wide range of accessories. Connecting a clamp
When an accessory is connected, the locator or 1 Put the clamp connector into the accessory socket
transmitter will recognize it and will enable the mode on the front of the RD7200 locator.
appropriate to the accessory. For example, attaching an
A-Frame to the RD7200 locator will automatically switch 2 Place the clamp around the pipe or cable and switch
the locator to fault-find mode and limit the number of the locator on.
available frequencies to those that are compatible with 3 Set the frequency to the same as that on the
the A-Frame. The LCD will also display an icon of the transmitter.
accessory and will remove any nonessential icons from
the screen. 4 Put the clamp around each cable in turn and note
the bar graph response. Compare the strength of
Radiodetection supply an accessory sheet with pictures response from each cable. The cable with a
and details of all applicable accessories which is substantially stronger response than the others will
available on www.radiodetection.com be the cable to which the transmitter signal has been
For a full list of supported accessories that are available applied.
for purchase, refer to the appendix

9.2 Headphones
Radiodetection supplies an optional headphone set for
the RD7200 locator. The headphones feature an
adjustable headband to ensure a tight fit when used in
the field. The accessory headphones also feature
volume adjustment for both left and right speakers.
Connect the 3.5mm headphone jack into the locator’s
headphone socket, which is located next to the
accessory panel.
Figure 9.1: Connecting clamps
WARNING! Before wearing headphones, lower the
locator’s volume levels to help prevent damage to your
hearing. To ensure that the target cable has been correctly
identified, reverse the positions of the transmitter and
locator and check that the strongest response is still
WARNING! Wearing headphones may impede your
received from the target cable by the locator in its new
awareness to dangers in the field such as moving traffic or position.
other heavy machinery. Exercise caution!
Locator clamp range
9.3 Locator clamps
Standard clamps
A locator clamp is used to positively locate and identify
a cable when several cables are running close together. The clamp plugs into the locator accessory socket and
is used for cable identification at points where the cable
A target cable can be identified in a chamber, on a tray can be accessed. The standard clamps are suitable for
or other access point by fitting a clamp to the locator and cables up to 130mm (5¼”) diameter.
examining each cable in turn. Signal strength response
shown on the locator display should be noted for each
cable.

When to use clamps

Clamps can be used where:
 Several cables or pipes run in close proximity to
each other.

© 2021 Radiodetection Ltd 34

 7 Plug the clamp into the transmitter output socket.
8 Put the clamp around the pipe or cable and ensure
that the jaws are closed. Switch the transmitter on.
The display will show the Clamp connected icon

Figure 9.4 Clamp connected icon

The line should be grounded (earthed) on each side of

Figure 9.2: Standard Clamp
the clamp for the signal to transfer to the line. Ground
the line if necessary. An insulated cable may be traced
even if it has no actual ground connection, providing a
Small clamp
reasonable length is buried either side of the clamp to
The small clamp performs the same function as the provide capacitive coupling to ground (earth).
standard clamp but is useful in cramped situations where
there is insufficient access for the standard clamp. NOTE: It is not necessary to make a ground connection
from the transmitter when using the clamp.
The small clamp is suitable for cables up to 50mm (2”)
diameter.
Transmitter clamp range
9.4 Transmitter clamps Although transmitter and locator clamps look the same,
they have different internal windings. To prevent the
The transmitter clamp fits around a pipe or cable and
wrong clamp being connected, transmitters and locator
safely applies a signal to a live insulated cable without
clamps have plugs of a different orientation.
interrupting or disconnecting the supply. The clamp
applies a very discriminating signal to a target line with
reduced coupling to other lines. A clamp can sometimes Standard signal clamps
be a more effective method of applying the signal than The standard clamps apply the transmitter signal very
Direct Connection. selectively and effectively to a target cable up to 130mm
The target line will carry the strongest signal. The other (5¼”) in diameter using frequencies from 8kHz to
lines will carry the weaker return signal. If the system 200kHz
comprises only two conductors, they may carry equal
signals.

WARNING! Do not clamp around uninsulated live

conductors

WARNING! Before applying or removing the clamp

around a power cable, ensure that the clamp is connected
to the transmitter at all times.

The clamp may buzz or vibrate if it is placed around a

power cable that has significant net current flow. This is
normal and does not harm the equipment.

Connecting the clamp

Figures 9.5 – 9.6: Connecting transmitter clamps

The standard and small clamps have a double spring

Figure 9.3 Transmitter output socket action for positive toroidal contact.

© 2021 Radiodetection Ltd 35

 WARNING! . The transmitter must only be connected insertion or pushing through pipes etc. and the smaller
to live services using the appropriate accessory such as a diameter sondes can be used in conjunction with jetting
machines and blown through the duct. A suitable
plug connector or live cable connector.
Radiodetection locator can then be used to locate the
sonde. Check that your locator features sonde locating
9.5 Transmitter external power before starting.
supply
Choosing a suitable sonde
The external Mains or vehicle power supplies provides
Radiodetection offers a wide range of sonde to suit most
an alternative and convenient method of powering the
applications: From the ¼” / 6mm diameter S6 33kHz
transmitter.
microsonde which, with a range of 6.6” / 2m, targets
WARNING!. The mains power supply rating are: 100- fiber-optic micro ducting or other small non-conductive
240VAC, 1.3A. Always use an adequately rated detachable pipes, to the 33kHz Super Sonde, which with a depth
mains lead. range of 50 feet / 15m targets deep sewer pipes.
Consult the precision locate accessory range brochure
WARNING!. The mains power supply is not IP rated or web page on www.radiodetection.com for a full list of
and should not be used in wet locations all available sondes and their technical specifications.

Check that the sonde has sufficient range for the

application and is dimensionally small enough and
sufficiently robust for the application. Ensure that the
frequency of the sonde corresponds with the locator
frequency; the locator will not locate the sonde unless
the frequencies are the same. Sondes are marked with
their transmitting frequency. Ensure that the means of
propelling the sonde is available together with the
correct fittings and couplings.

Preparation
Insert a new battery into the sonde. A new battery or a
Figure 9.7: Transmitter DC Input freshly recharged battery should be used at the
To use the mains or vehicle power supply units connect beginning of each day and preferably at the start of each
them to the DC input socket in the transmitter before new job.
connecting them to the mains or vehicle supply socket. Before inserting the sonde, check that the sonde and
locator are at the same frequency and working correctly.
WARNING! The mains PSU supply cable is the To do this, place the sonde on the ground at a distance
disconnecting method for isolating the unit from the main from the locator that is equal to the rated depth of the
supply. sonde. Point the locator at the sonde with the antenna in
line with the sonde (the opposite of using the locator to
locate a line) and check that the bargraph reading
WARNING! The battery compartment lid is the exceeds 50% at maximum sensitivity.
disconnecting method for isolating the unit from the battery
supply. Propelling a sonde
Sondes have a thread at one end for connecting to
WARNING! Do not position the equipment so it is drain rods, or to other devices for inserting and propelling
difficult to disconnect the unit from each supply. the sonde along a drain or duct. Sondes may be floated
along drains at the end of a tether and floats are
available for fitting to the sewer sonde and super sonde.
WARNING! Protection will be impaired if used in a Sondes can be strapped to high-pressure water jets or
manner not specified similar devices used for cleaning, maintaining and
inspecting drains. Sondes used in underground drilling
9.6 Sondes and boring operations are normally housed in the boring
or drill head behind the boring or drill bit.

Sonde overview Locating and tracing a sonde

A sonde is a self-contained battery operated transmitter Insert the sonde in the drain or duct access and locate it
used for tracing the paths of pipes, ducts, sewers and
while it is still just in view at the drain or duct entrance.
drains and in the precise location of blockages or
Hold the locator vertical directly over the sonde with the
collapses. The sonde can be fitted to a flexible rod for
© 2021 Radiodetection Ltd 36
antenna in line with the sonde. Adjust the locator 4 Repeat 1, 2 and 3 with the antenna vertical and
sensitivity so the bar graph reads between 60% and resting on or just above the ground. The locator
80%. should then be directly above the sonde with the
antenna in line with it. Mark the position of the sonde
The sonde radiates a Peak field from the center of its
and its direction.
axis with a ghost signal at each end of the Peak. Move
the locator a little way behind and then in front of the axis 5 Propel the sonde a further 1 or 2 meters, pinpoint,
of the sonde to detect the ghost signals. Finding the two and mark the position. Repeat this pinpoint
ghost signals positively confirms the locate. Reduce the procedure at similar intervals along the line of the
locator sensitivity to lose the ghost signals but still drain or duct until the survey is completed.
indicate a clear Peak response directly over the sonde.
Locator sensitivity is now set for tracing the duct or drain Checking sonde depth
unless the distance between sonde and locator
changes. The RD7200 locator will automatically display the depth
of a located sonde providing the locator is correctly
Propel the sonde three paces along the drain or duct and oriented and positioned above the sonde. Using the LCD
stop. Place the locator over the supposed position of the compass as a guide, rotate the locator until the compass
sonde. Do not adjust the sensitivity level. indicates the sonde is in East / West position.

Figure 9.7 Sonde deployment

To locate a sonde: Figure 9.9: Calculating sonde depth

1 Move the locator backwards and forwards and stop
when the bar graph indicates a Peak. You can use Calculation method
the LCD compass to orient the blade of the locator Pinpoint the sonde. Move the locator in front of the
with the direction of the sonde. sonde and still with the antenna in line with it, increase
2 Rotate the locator as if the blade is a pivot. Stop sensitivity to find the Peak of the ghost signal. Move the
when the bar graph indicates a Peak. locator to behind the sonde ensuring that the locator
blade is always in line with the sonde. Find the null
positions A and B (See Figure 8.10). Measure the
distance between them and multiply by 0.7 to give an
approximate depth measurement.

Flexitrace
The Flexitrace is a traceable plastic covered fiberglass
rod incorporating wire conductors and is used for
locating small diameter, non-metallic pipes to a depth of
3 meters. The Flexitrace can be inserted into a pipe or
duct as small as 9mm / 3/8” internal diameter, and it has
minimum bend radius of 250mm. Batteries are not
required, as the FlexiTrace is powered by any
Radiodetection transmitter.
The FlexiTrace has a maximum power rating of 1W.
Figure 9.8 Locating a sonde
When using the FlexiTrace with a Radiodetection Tx-5
3 Move the locator from side to side until the bar graph or Tx-10 transmitter the output limit must be set to 1W in
indicates a Peak. the MAX P menu and the output voltage limit set to LOW
in the MAX V menu.

© 2021 Radiodetection Ltd 37

 WARNING! Failure to follow the Tx-5 or Tx-10 The small stethoscope antenna has a 25mm (2”)
concave head at the end of a 2m (6½ ft) lead. The small
instructions above may result in the tip of the FlexiTrace
stethoscope can be screwed into an extension rod or
becoming too hot to touch, resulting in risk of personal injury used at the end of several extension rods joined together
and damage to the equipment. for identifying inaccessible small cables.

The FlexiTrace can be used in two modes: Sonde mode Miniature hi-gain stethoscope
or Line mode. In sonde mode only the tip of the
FlexiTrace is energized whilst in line mode its whole The miniature stethoscope is similar to the small
length is energized. stethoscope but has no handle or facility for extension
rods.
To use as a sonde, connect both transmitter leads to the
FlexiTrace stud terminals. As the FlexiTrace terminals The miniature stethoscope can also be used as a
are not color coded it does not matter to which terminals miniature antenna for locations where the bulk of the
the leads are connected. To use the FlexiTrace in line locator makes it inconvenient for use, such as locating
mode, connect the red transmitter lead to one of the pipes or cables in walls.
FlexiTrace terminals and connect the black transmitter
lead to a suitable ground connection. 9.8 Submersible antenna
When to use a submersible antenna
Tracing buried pipes and cables across waterways and
estuaries are frequent and critical locating applications.
Less frequent but equally important is tracing and
locating lines between the mainland and offshore
islands. When locating pipes and cables the locator
sensing antennas should be as close as possible to the
40mm 8mm
target line so it is not practical to locate lines buried
under a river or seabed from the surface. In most cases,
it is necessary to measure the depth of cover to ensure
40mm the line is protected from dragging anchors or other
Figure 9.10: FlexiTrace
underwater hazards.
The submersible, double depth antenna is suitable for
9.7 Stethoscopes use under water for tracing pipes or cables. There is a
weight at the bottom of the antenna for stability and the
When to use a stethoscope unit has been pressure tested to IP68 to a depth of 100m
(300ft).
At times, it may not be possible to put a clamp around a
cable because of congestion or because of The antenna is supplied with 10m of submersible marine
inaccessibility. A stethoscope antenna should be used in umbilical cable as standard, but lengths of up to 100m
place of a clamp to identify the target cable(s). can be supplied. The extra length enables the antenna
to be carried by a diver on a riverbed or seabed while the
locator is used in a surface vessel. It is crucial to have
How to use a stethoscope effective communication between the operator with the
Plug the stethoscope into the locator accessory socket. locator and the diver with the antenna.
Press the concave head against each cable in turn to Alternatively the antenna can be fastened to the end of
detect a maximum signal. a non-metallic boom from a barge and lowered to the
riverbed or seabed.
Stethoscope range
How to use a submersible antenna
Large stethoscope antenna
Apply the transmitter signal to the target line at an
The large stethoscope antenna, which plugs into the access point on the shore. The submersible antenna line
locator accessory socket, is used for cable identification for tracing the line underwater is plugged into the
in situations where the cable is exposed. It is particularly accessory socket of the locator. The locator is used
useful for identifying heavy cables lying in a tray where onboard a boat, which should by positioned directly over
it is not possible to fit a clamp. The concave detector the line. The transmitting signal should be applied by
head on the end of the insulated, flexible gooseneck is Direct Connection with the strongest possible signal and
placed firmly against the cable to be identified. If there at the frequency that the submersible antenna is
are a number of cables, the stethoscope antenna will calibrated to. Make a ground connection about 50m
give the strongest response from the cable to which the (160ft) from the transmitter. Test the quality of signal on
transmitter signal has been applied. the line before locating on the water.

Small stethoscope antenna

© 2021 Radiodetection Ltd 38
NOTE: The submersible antenna is calibrated to work at
one frequency.

Tips for using a submersible antenna:

The user in the boat should be a specialist or have
considerable experience using a locator so that they can
give concise instructions to the diver.
It is prudent for the pair to practice working together on
dry land before attempting to locate underwater. Using
the antenna the diver should locate and trace a known
line blindfolded receiving directions from the user with
the locator out of sight of the line and the diver.
Because of rapid signal loss and a combination of large
surface area and very conductive soil there may be
problems applying a suitable signal for tracing a large
diameter pipe. It may be necessary to use a high power,
low frequency tracing signal.
It is necessary to define a method of recording target line
position and depth before starting work in the boat or on
the seabed.

Figure 9.11: Using a submersible antenna

WARNING! Only properly licensed and experienced

divers should attempt to use the submersible antenna

© 2021 Radiodetection Ltd 39

Section 10 - Appendices
year, either at Radiodetection or a Radiodetection-
10.1 Care and maintenance approved repair center.
The RD7200 locator and transmitter are robust, durable Regularly check your locator for correct operation using
and weatherproof. However you can extend your eCert (see section 10.6) and the on-board Self-Test.
equipment’s life by following these care and
maintenance guidelines. NOTE: Service by non-approved service centers or
operators may void the manufacturer’s warranty.
General
Store the equipment in a clean and dry environment. Radiodetection products, including this guide, are under
continuous development and are subject to change
Ensure all terminals and connection sockets are clean, without notice. Go to www.radiodetection.com or contact
free of debris and corrosion and are undamaged. your local Radiodetection representative for the latest
Do not use this equipment when damaged or faulty. information regarding the RD7200 locator or any
Radiodetection product.
Batteries and power supply 10.2 Enhanced Self-Test
Use only good quality Alkaline or NiMH batteries.
RD7200 locators incorporate an Enhanced Self-Test
When using an AC adapter, use only Radiodetection feature. In addition to the typical checks for display and
approved adapters. power functions, the RD7200 applies test signals to it’s
locating circuitry during a Self-Test to check accuracy
Only use Radiodetection approved Li-Ion battery packs.
and performance.
Cleaning We recommend that a self-test is run at least weekly, or
before each use.
WARNING! Do not attempt to clean this equipment
when it is powered or connected to any power source,
Running a Self-Test
including batteries, adapters and live cables. As the Self-Test tests the integrity of the locate circuity,
it is important that it is carried out away from large
Ensure the equipment is clean and dry whenever metallic object such as vehicles, or strong electrical
possible. signals. To run a Self-Test:

Clean with a soft, moistened cloth. 1 Press the key to enter the menu
If using this equipment in foul water systems or other 2 Scroll to the INFO menu using the or keys
areas where biological hazards may be present, use an
appropriate disinfectant. 3 Press the key to enter the INFO menu
Do not use abrasive materials or chemicals as they may 4 Select TEST using the or keys.
damage the casing, including the reflective labels.
5 Press the key to select YES
Do not use high pressure hoses.
6 Press the key to begin the Self Test
Disassembly 7 Once the Self-Test is completed, the result (PASS
Do not attempt to disassemble this equipment under any or FAIL) will be displayed.
circumstances. The locator and transmitter contain no
8. Restart the locator using the key
user serviceable parts.
Disassembly may damage the equipment and or reduce 10.3 RD Manager Online
its performance and may void the manufacturer’s
warranty. RD Manager Online is the RD7200 Locator PC
companion and allows you to manage and customize
your locator. It also allows software upgrades to both the
Service and maintenance locator and transmitter.
The locator and transmitter are designed to minimize the You can use RD Manager Online to register your
requirement for regular calibration. However, as with all products to extend the warranty to a total of 3 years (see
safety equipment, it is recommended (and may be Section 10.4), setup your locator by performing a
required by law) that they are serviced at least once a number of maintenance tasks, such as setting date and
time, activating and de-activating active frequencies,

© 2021 Radiodetection Ltd 40

setting up custom frequencies, or setting-up functions NOTE: To upgrade your software you need to have
like StrikeAlert. created an account using RD Manager Online and have
a live internet connection. An optional Radiodetection
RD Manager Online is compatible PCs running with
supplied power source may be required to update your
Microsoft Windows 10 64 bit.
transmitter software.
For more information about RD Manager Online refer to
the RD Manager Online operation manual.
10.6 eCert
To Obtain RD Manager Online: The RD7200 locator should be regularly checked to
ensure its correct operation.
1 Go to
http://www.radiodetection.com/RDManager_online eCert provides a thorough test of the RD7200’s locating
circuitry, and supplies a Radiodetection Calibration
2 Follow the instructions
Certificate when a positive test result is obtained.
To run eCert, the locator should be connected to an
internet-enabled PC, on which the RD Manager Online
10.4 Warranty and extended software is installed. Additional eCert credits may be
warranty required and purchased.
RD7200 locators and transmitters are covered by a 1 Refer to the RD Manager Online operation manual for
year warranty as standard. further details.
Customers can extend the warranty period to a total of 3
NOTE: eCert is not presently available for transmitters.
years by registering their products (locators and
transmitters) within 3 months from purchase.
To register your product:
Visit https://portal.radiodetection.com to create your
portal account* and use the Product page to register
your locator or transmitter.
Visit https://support.radiodetection.com for
instructions on how to create a portal account or
register your product.
* A valid email address and mobile number are
required.

From time to time Radiodetection may release new

software to improve the performance or add new
functionalities to his products. By registering user will
benefits from subscribing to e-mail alerts advising about
any new software and special offers related to its product
range.
Users will be able to opt out at any moment from
receiving software and technical notifications or just
from receiving marketing material.

10.5 Upgrading software

From time to time, Radiodetection may release software
upgrades to enhance features and improve performance
of the RD7200 locator or transmitter.
Software upgrades are free of charge.
You can check if your products are up-to-date or
upgrade them by using the RD Manager Online software
upgrade screen. Refer to the RD Manager Online
operation manual for further information.
E-mail alerts and notification of new software releases
are sent to all registered users.

© 2021 Radiodetection Ltd 41

10.7 TX5 and TX10 locator models, operation mode and active
frequencies
Active Operation PDL PDLU PXL TL PL DL SL SLQ H2O+ RD4K 72 82
Frequencies Mode
512Hz
DC
CD Clamp
• • • • • • • • •

570Hz
DC
CD Clamp
• •

577Hz
DC
CD Clamp
• • •

640Hz
DC
CD Clamp
• • • • • • •

760Hz
DC
CD Clamp
• •

870Hz
DC
CD Clamp
• • •

920Hz
DC
CD Clamp
• •
DC
940Hz Induction • • • •
CD Clamp
DC
Induction • • • • •
4kHz (4096Hz) Clamp
CD Clamp
LPC/LCC
DC
Induction • • • • • • • • • • • •
8kHz (8192Hz) Clamp
LPC/LCC
DC
Induction • • •
9.8kHz (9820Hz) Clamp
CD Clamp
LPC/LCC
DC
Induction • • • • • • • • • • • •
33kHz (32,768Hz) Clamp
LPC/LCC
DC
Induction • • • • • • • • • • •
65kHz (65,536Hz) Clamp
CD Clamp
LPC/LCC
DC
Induction • •
83kHz (83,000Hz) Clamp
CD Clamp
LPC/LCC
DC
Induction • • • • • • •
83kHz (83,077Hz) Clamp
CD Clamp
LPC/LCC
DC
Induction • • • • • • • • • •
131kHz Clamp
(131,072Hz) CD Clamp
LPC/LCC
DC
Induction • • • • • •
200kHz Clamp
CD Clamp
LPC/LCC
(*) DC = Direct Connection, LPC = Live Plug Connector, LCC= Live Plug Connector

10.8 TX5 Fault Find locator models

CD pairs PDL TL PL 72 82

8KFF • • • • •

© 2021 Radiodetection Ltd 42

10.9 TX 10 Fault Find locator models
CD pairs PDL PDLU TL PL H2O+ 72 82

8KFF • • • • •

10.10 List of supported accessories

Locator Accessories

High Gain Stethoscope 10/RX-STETHOSCOPE-HG

Small Stethoscope 10/RX-STETHOSCOPE-S

Large Stethoscope 10/RX-STETHOSCOPE-L

640Hz Submersible DD Antenna (10m Cable) 10/RX-SUBANTENNA-640

8kHz Submersible DD Antenna (10m Cable) 10/RX-SUBANTENNA-8K

512Hz Submersible DD Antenna (10m Cable) 10/RX-SUBANTENNA-512

Additional Submersible Cable Length (x meter) 10/RX-SUBANTENNA-CABLE

10/RX-SUBANTENNA-
Submersible Antenna Adaptor
ADAPTOR

Headphones 10/RX-HEADPHONES

A-Frame (includes A-Frame Lead) 10/RX-AFRAME

A-Frame Bag 10/RX-AFRAME-BAG

A-Frame Lead 10/RX-AFRAME-LEAD

© 2021 Radiodetection Ltd 43

 10/RX-CLAMP-2
2" (50mm) Locator Clamp Or
10/RX-CLAMP-50

10/RX-CLAMP-4
4" (100mm) Locator Clamp or
10/RX-CLAMP-100

10/RX-CLAMP-5
5" (130mm) Locator Clamp or
10/RX-CLAMP-130

Locator CD/CM Clamp (only used for Current

10/RX-CD-CLAMP
Measurement)

Transmitter Accessories

10/TX-LPC-XX
Live Plug Connector
(XX= EU, UK, US)

Live Cable Connector (with Crocodile

10/TX-LCC
clips)

10/TX-CLAMP-2
2" (50mm) Transmitter Clamp or
10/TX-CLAMP-50
10/TX-CLAMP-4
4" (100mm) Transmitter Clamp or
10/TX-CLAMP-100
10/TX-CLAMP-5
5" (130mm) Transmitter Clamp or
10/TX-CLAMP-130
10/TX-CLAMP-8.5
8.5” (215mm) Transmitter Clamp or
10/TX-CLAMP-215

Signal Clamp Extension Rod 10/TX-CLAMP-EXTROD

Transmitter Connection Kit

Contains Earth Reel, Earth Stake, Direct 10/TX-CONNECTION-KIT
Connection Lead and Magnet
Transmitter Connection Kit
Contains Earth Reel, Earth Stake, Direct
10/TX-CONNECTION-KIT-BAN
Connection Lead with banana connectors
and Magnet

© 2021 Radiodetection Ltd 44

Earth Lead 10m and Magnet 10/TX-EARTHLEAD-KIT

Earth Lead 10m 10/TX-EARTHLEAD

Hi-strength Magnet with M4 eyebolt 10/TX-MAGNET

Spiral Earth Stake 10/TX-EARTHSTAKE

Tx Direct Connection Lead 10/TX-DC-LEAD

Tx Direct Connection Lead, crocodile clip 10/TX-DC-LEAD-TEL

Tx Direct Connection Lead with banana

10/TX-DC-LEAD-BAN
connectors, insulated plug/socket

Tx Direct Connection Lead with banana

10/TX-DC-LEAD-OPEN
connectors, Open Grid Europe

Tx-10 Isolation Transformer (for locating 10/TX121-XX

3-phase core-core shorts) (XX= DE, EN, FR, NL)

Accessories for tracing or locating non-conductive utilities

Standard Sonde 33kHz, depth up to 5m 10/SONDE-STD-33

Standard Sonde 8kHz, depth up to 5m 10/SONDE-STD-8

Standard Sonde 512Hz, depth up to 5m, single end 10/SONDE-STD-512

Standard Sonde 512Hz, depth up to 5m, twin end 10/SONDE-STD-512-TW

Sewer Sonde 33kHz, depth up to 8m 10/SONDE-SEWER-33

© 2021 Radiodetection Ltd 45

External Shell for heavy-duty Applications (dia. as
10/SONDE-SEWER-SHELL
Sewer Sonde)

Super Sonde 33kHz, depth up to 15m

10/SONDE-SUPER-33

4.5" (115mm) Diameter Floats/Pair for Sewer and 10/SONDE-FLOATS

Super Sondes

S6 Microsonde Kit, incl. battery and case 10/SONDE-MICRO-33

Pack of 10 × Batteries for S6 Microsonde 10/SONDE-MICRO-

BATPACK

10/SONDE-MINI-33
S9 MiniSonde, incl. battery and case

Pack of 10 × Batteries for S9 MiniSonde 10/SONDE-MINI-BATPACK

S13 Sonde Kit (includes M10 Stud and Plain End

10/SONDE-S13-33
Caps, two Batteries and Case)

Pack of ten spare Batteries for S13 Sonde 10/SONDE-S13-BATPACK

S18A Sonde 33kHz with M10 Stud End Cap and one
10/SONDE-S18A-33
D1/3N battery

S18A Sonde 33kHz Kit with M10 Stud and Plain End
10/S18-33-KIT
Caps and two D1/3N Batteries

S18A M10 Stud End Cap with one D1/3N Battery 10/S18-M10-ENDCAP

S18A Extended Plain Cap with one D1/3N Battery 10/S18-PLAINENDCAP

S18A Pack of 5 D1/3N Batteries 10/S18-BATTERYPACK

S18B Sonde 33kHz with Extended Aluminum End

10/SONDE-S18B-33
Cap for two AA Batteries (batteries included)

© 2021 Radiodetection Ltd 46

S18B Sonde Aluminum AA Batteries End Cap (batteries 10/S18-AA-ENDCAP
included)

Bendi Sonde with M10 Male End Cap (512Hz

10/SONDE-BENDI-512
continuous)

10/SONDE-BENDI-
Pack of 5 AA Batteries
BATPACK

10/TRACE50-XX
FlexiTrace 50m (Tx powered pushrod transmitter)
(XX = D, F, GB, NL)

10/TRACE80-XX
FlexiTrace 80m (Tx powered pushrod transmitter)
(XX = D, F, GB, NL)

4.5mm 50m Flexrod 10/FLEXRODF50-4.5

4.5mm 80m Flexrod 10/FLEXRODF80-4.5

6.7mm 50m Flexrod 10/FLEXRODF50-7

6.7mm 100m Flexrod 10/FLEXRODF100-7

6.7mm 150m Flexrod 10/FLEXRODF150-7

9mm 60m Flexrod 10/FLEXRODF60-9

9mm 120m Flexrod 10/FLEXRODF120-9

M6 to M10 adapter to interface 6.7mm rod with RD 10/6-

M10 thread 10FLEXRODADAPTOR

Spring Coupling M10 Male 10/SU0335

Wards Rod Connector, 3/4" (19mm) x 10 BSW,

02/SU0341
Female:

Wards Rod Connector, 1/2" (13mm) x 12 BSW,

02/SU0342
Female

"Lockfast" Connector, 3/4" (19mm) x 10 BSW 02/SU0676

© 2021 Radiodetection Ltd 47

 Locator power accessories and spares

Li-Ion rechargeable battery pack with mains

10/RX-MBATPACK-LION-K-XX
charger (includes power lead) (1)

Li-Ion rechargeable battery pack with auto charger

10/RX-ABATPACK-LION-K
(1)

Li-Ion rechargeable battery pack with mains and 10/RX-MABATPACK-LION-K-

automotive charger (includes power lead) (1) XX

2 cells battery tray (2x D Cell / LR20) (2) 10/RX-2DCELL-TRAY

(1) Compatible with RD7200/RD8200, RD8100/RD8100 and Marker (MRX) Locators

(2) Compatible with RD7200/RD8200, RD7100/RD8100 and RD7000+/RD8000 Locators
Replace XX with AU, EU, UK or US

Transmitter power accessories and spares

Mains PSU (includes power lead) 10/TX-MPSU-XX

12V Car Power Lead with Isolation Transformer 10/TX-APSU

Li-Ion rechargeable battery pack with mains

10/TX-MBATPACK-LION-K-XX
charger (includes power lead) (1)

Li-Ion rechargeable battery pack with automotive

10/TX-ABATPACK-LION-K
charger (1)

Li-Ion rechargeable battery pack with mains and

10/TX-MABATPACK-LION-K-XX
automotive charger (includes power lead) (1)

Li-Ion automotive charger (1) 10/TX-ACHARGER-LION

© 2021 Radiodetection Ltd 48

 Li-Ion mains charger (includes power lead) (1) 10/TX-MCHARGER-LION-XX

Li-Ion rechargeable battery pack (no charger) (1) 10/TX-BATPACK-LION

8 cells battery tray (8x D Cell / LR20)

10/TX-8DCELL-TRAY

(1) Li-Ion rechargeable packs cannot be charged in the transmitter

Replace XX with AU, EU, UK or US

D Cell batteries

Alkaline Battery (D-Cell, LR20, MN1300) 10/1DCELL-ALK

Mains Leads

C7 Mains lead, 6.5' (2m), 2.5A 10/MAINS-LEAD-C7-XX

10/MAINS-LEAD-C13-XX
C13 Mains lead, 6.5' (2m), 2.5A
(XX=US, UK, EU or AU)

Replace XX with AU, EU, UK or US

Transport and Storage Accessories

Locator backpack and bag for Tx transmitter 10/LOCATOR-BACKPACK-

(without tool tray) - set of soft carry bags SET

Locator backpack 10/LOCATOR-BACKPACK

Tx transmitter (without tool tray) soft carry bag 10/TX-BAG

© 2021 Radiodetection Ltd 49

 Locator and Tx transmitter soft carry bag 10/LOCATORBAG

Locator and Tx transmitter hard case 10/RD7K8KCASE-USA

Locator and Tx transmitter hard flight case with

10/RD7K8KCASE
wheels

Calibration Certificates, Remote Calibration and PC Software

Locator Calibration Certificate, per unit

(requestable with initial locator order, cannot be ordered 10/CALCERT
later)

RD Manager Online
www.radiodetection.com/rdmanager_online
Check product documentation for details

© 2021 Radiodetection Ltd 50

Visit www.radiodetection.com

Our locations
Radiodetection Ltd. (UK) – Global Headquarters
Western Drive, Bristol, BS14 0AF, UK
Tel: +44 (0) 117 976 7776 rd.sales.uk@spx.com

Radiodetection (France)
13 Grande Rue, 76220, Neuf Marché, France
Tel: +33 (0) 2 32 89 93 60 rd.sales.fr@spx.com

Radiodetection (Benelux)
Industriestraat 11, 7041 GD ’s-Heerenberg, Netherlands
Tel: +31 (0) 314 66 47 00 rd.sales.nl@spx.com

Radiodetection (Germany)
Groendahlscher Weg 118, 46446 Emmerich am Rhein, Germany
Tel: +49 (0) 28 51 92 37 20 rd.sales.de@spx.com

Radiodetection (Asia-Pacific)
Room 708, CC Wu Building, 302-308 Hennessy Road, Wan Chai, Hong Kong SAR, China
Tel: +852 2110 8160 rd.sales.asiapacific@spx.com

Radiodetection (China)
Ming Hao Building D304, No. 13 Fuqian Avenue, Tianzhu Town, Shunyi District, Beijing 101312, China
Tel: +86 (0) 10 8416-3372 rd.service.cn@spx.com

Radiodetection (Australia)
Unit H1, 101 Rookwood Road, Yagoona NSW 2199, Australia
Tel: +61 (0) 2 9707 3222 rd.sales.au@spx.com
Radiodetection (USA)
28 Tower Road, Raymond, Maine 04071, USA
Toll Free: +1 (877) 247 3797 Tel: +1 (207) 655 8525 rd.sales.us@spx.com

Schonstedt Instrument Company (USA)

100 Edmond Road, Kearneysville, WV 25430 USA
Toll Free: +1 888 367 7014 Tel: +1 304 724 4722
schonstedt.info@spx.com www.schonstedt.com

Radiodetection (Canada) Scan to see a

full list of our
344 Edgeley Boulevard, Unit 34, Concord, Ontario L4K 4B7, Canada office locations
Toll Free: +1 (800) 665 7953 Tel: +1 (905) 660 9995 rd.sales.ca@spx.com

Sensors & Software Inc. (Canada)

1040 Stacey Court Mississauga, Ontario L4W 2X8, Canada
Toll-free: +1 800 267 6013 Tel: +1 (905) 624 8909 sales@sensoft.ca www.sensoft.ca

Copyright © 2021 Radiodetection Ltd. All rights reserved. Radiodetection is a subsidiary of SPX Corporation. RD7200, Power Filters,Peak+, eCert, StrikeAlert,
SideStepAuto, CALSafe, RD Manager Online and Radiodetection are either trademarks of Radiodetection in the United States and/ or other countries. Microsoft
and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. Due to a policy of continued
development, we reserve the right to alter or amend any published specification without notice. This document may not be copied, reproduced, transmitted, modified
or used, in whole or in part, without the prior written consent of Radiodetection Ltd.

90/RD7200-OM-ENG/03