THE PROBE LEVEL MONITOR
THE PROBE
LEVEL MONITOR
Instruction Manual PL-517 January 2001
33455170
Rev. 2.2
Introduction
Note:
The Probe is to be used only in the manner outlined in this
instruction manual.
The Probe is an ultrasonic level monitor combining sensor and
electronics in a single package. It is designed to measure liquid
®
levels in closed vessels. The process part (sensor) is Tefzel ,
allowing The Probe to be used in a wide variety of industries. The
optional sanitary version affords quick removal and ease of cleaning
as demanded by the food, beverage and pharmaceutical industries.
The sensor houses the ultrasonic transducer and temperature
sensing element. The Probe emits a series of ultrasonic pulses from
the transducer. Each pulse is reflected as an echo from the material
and sensed by the transducer. The echo is processed by The Probe
using Milltronic's proven `Sonic Intelligence' techniques. Filtering is
applied to help discriminate between the true echo from the
material, and false echoes from acoustical and electrical noises and
agitator blades in motion. The time for the pulse to travel to the
material and back is temperature compensated and then converted
into distance for display, mA output and relay actuation.
The Probe also offers a digital communications option for data
®
collection and remote access using Hart field communication protocol.
Installation
Environmental
The Probe should be mounted in an area that is within the
temperature range specified and that is suitable to the housing
rating and materials of construction. The front lid should be
accessible to allow programming, wiring and display viewing.
It is advisable to keep The Probe away from high voltage or current
runs, contactors and SCR control drives.
Location
Locate The Probe so that it will The Probe's sound path should not
have a clear sound path intersect the fill path rough walls,
perpendicular to the liquid surface seams, rungs, etc
fill
sanitary
ferrule
pipe
rungs
seams
Page 2 The Probe PL-517
Mounting
Note:
Mount The Probe so that the face of the sensor is at least 25 cm
above the highest anticipated level.
Threaded
The Probe is available in three thread types: 2" NPT, 2" BSP or PF2.
hinged lid
7mm 84mm
(0.3”) (3.3”)
max.
117mm
(4.6”)
cable entry
‘knock out’
279mm electronics
(11”)
87mm
(3.4”)
Ø mounting
thread
74mm
(2.9”) sensor
61mm 53mm
(2.4”) (2.1”)
Ø max
Note:
Before inserting The Probe into its mounting hole, insure that the
threads are of the same type to avoid damaging The Probe threads.
Flange Adapter (optional)
The Probe can be fitted with the optional 75 mm (3") flange adapter
for mating to 3" ANSI, DIN 65PN10 and JIS 10K3B flanges.
optional The Probe
flange
adapter
PL-517 The Probe Page 3
Sanitary
Notes:
• Mount The Probe so that the face of the sensor is at least 25
cm above the highest anticipated level.
• The Sanitary Probe 3A approval is for chemical clean-in-place
applications to 60°C (140°F) only. Ensure your cleaning
® ®
chemicals are compatible with Tefzel or Kynar Flex ,
depending on your Probe type.
hinged lid 7mm 84mm
(0.3”) (3.3”)
max.
117mm
(4.6”)
cable entry
‘knock out’
electronics
279mm
(11”)
87mm
(3.4”) mounting
Ø thread
integral 76mm
sealing (2.9”) sensor
ring
61mm 53mm
(2.4”) (2.1”)
Ø max
• mount The Probe onto the top of the tank's sanitary ferrule
• secure mating by surrounding the joint with the clamp
• tighten adjusting wing nut
Sanitary Ferrule,
The Probe
4” FDA Approved
(US Food and Drug
Administration)
clamp*
adjusting
wing nut
ferrule 119 mm (4.68”)
97 mm (3.83”)
tank
dimensions are approximate
*supplied with the Probe
Note:
Inside of sanitary ferrule must be smooth, free of burrs, seams or
ridges.
Page 4 The Probe PL-517
Interconnection
Notes:
• Installation shall only be performed by qualified personnel and
in accordance with local governing regulations.
• Separate cables and conduits may be required to conform to
standard instrumentation wiring practices, or electrical codes.
A. with lid closed, remove cable entry `knock out' on either
side as required
B. open lid by loosening the lid screw
C. run cable to The Probe
D. connect mA output, power supply and relay wiring7
E. close lid. Tighten screw to 1.1 to 1.7 N-m ( 10 to 15 in-lb)
of torque
Note:
Non-metallic enclosure does not provide grounding between conduit
connections. The use of approved watertight conduit hubs/glands is
required for IP65 / NEMA 4 / CSA Type 4 (outdoor) applications.
mA Output: 4 - 20 mA non-isolated
into 750 ohms max at 24 Vdc
Power Supply: 18 to 30 V dc
Connect to protective earth
Relay: dry contact, closed
unpowered or alarm state,
refer to specifications on page 19.
All field wiring must have insulation suitable for at least
250 V.
dc terminals shall be supplied from an SELV source in
accordance with IEC-1010-1 Annex H.
PL-517 The Probe Page 5
Operation
Start Up
• With The Probe correctly installed (or aimed at a wall 0.25 to 5 m
away), apply power.
• The Probe starts up displaying the following:
program mode
alphanumeric
‘20’ key
units
‘4’ key
LOE / fault
operation status
• It then defaults to the Run mode, which is the measurement reading
of the distance from the transducer face to the material level in the
units indicated:
• If the default display differs form that shown, refer to Operation
Status on page 7.
Calibration
The calibration of the mA output may be done such that its span will
be either proportional or inversely proportional to the material level.
proportional span inversely proportional span
high level = 20mA high level = 4 mA
low level = 4 mA low level = 20mA
Note:
The 4 and 20 mA levels may be calibrated in any order.
Calibration: Reference Method
Adjust the material level (or target) to the desired distance from the
sensor face. Press the “4” or “20” key (as appropriate) to view the
stored distance associated with that mA output value. Press the key
a second time to set the new distance reference. After viewing or
calibrating, Probe operation automatically reverts to the Run mode
(6 sec).
The calibration value is referenced from the face of The Probe
sensor, in the units displayed.
Page 6 The Probe PL-517
4 mA calibration
4 mA
calibration
calibration invalid
new 4mA
calibration if
retry
20 mA calibration
20 mA
calibration
calibration invalid
new 20 mA
calibration if
retry
Note:
Calibration bypasses the measurement response rate.
Operation Status
The graphic portion of the display gives the user a visual indication
of The Probe's operating status. Viewing the graphic can assist the
user in properly locating and installing The Probe to achieve
optimum performance.
GOOD WAITING LOE / FAULT
The logo will change from full to partial to indicate operation status.
After the `Waiting' period, the `?' icon will appear for an `LOE /
FAULT' indication. When a valid echo is again received, a `Good'
indication will resume. Refer to Troubleshooting on page 15.
PL-517 The Probe Page 7
Adjustments
There are several operating adjustments that can be made to The
Probe.
To access the operating adjustments, simultaneously press the "4"
and "20" keys until the desired adjustment is obtained. A viewing
sequence of the stored value is automatically initiated. During this
time the value can be changed by pressing either the "4" or "20"
key. After viewing or changing, operation automatically reverts to the
Run mode (6 sec).
4 mA calibration,
scrolling
20 mA calibration,
scrolling
blanking
speed of response
alarm
fail-safe
fail-safe timer
units
Page 8 The Probe PL-517
Calibration, Scrolling Method
The 4 and 20 mA calibration values can be selected where
reference levels, either from the material in the vessel or from a
target, cannot be provided. This method can also be used to trim the
output levels obtained by the Reference Method (see page 6).
To change the stored calibration value, obtain the `c 4' or `c 20'
display. The calibration value may be increased by pressing the "20"
key or decreased by pressing the "4" key. When the display has
scrolled to the desired value, stop pressing the key. The display
automatically reverts to the Run mode (6 sec).
4 mA calibration
4 mA calibration
initiated
view stored 4 mA
calibration value
i.e. 4.50 m
press to increase
to new calibration
value i.e. 4.60 m
new calibration
value
20 mA calibration
20 mA calibration
initiated
view stored 20 mA
calibration value
i.e. 0.50 m
press to decrease
to new calibration
value i.e. 0.45 m
new calibration
value
Note:
For faster scrolling, hold the key depressed during the calibration
adjustment and release when desired value is obtained.
PL-517 The Probe Page 9
Blanking
Blanking is used to ignore the zone in front of the transducer where
false echoes are at a level that interfere with the processing of the
true echo. It is measured outward from the sensor face. The
minimum recommended blanking value is 0.25 m (0.82 ft) but can
be increased in order to extend the blanking.
The Probe
blanking
To change the stored blanking value, obtain the `bL' display. The
blanking value may be increased by pressing the "20" key or
subsequently decreased by pressing the "4" key. When the display
has scrolled to the desired value, stop pressing the key. The display
automatically returns to the Run mode (6 sec).
blanking
3 sec
stored blanking
value i.e. 0.25 m
increase blanking
i.e. 0.36 m
oops - too far!
decrease to
desired blanking
value i.e. 0.35 m
new blanking value
6 sec
Note:
For faster scrolling, hold the key depressed during the blanking
adjustment and release when desired value is obtained.
Page 10 The Probe PL-517
Speed of Response
The speed of response adjustment allows the user to collectively set
a number of operating parameters.
measurement is the limit to which The Probe will be able to
response: keep up with rates of change.
If The Probe measurement cannot keep up
with the rate of level change, set the
adjustment from `1' to `2'. If The Probe still
cannot keep up with the rate of level change,
set the adjustment option to `3'. Avoid choosing
an option that is too fast for your application.
agitator discriminates between agitator blades in
discrimination motion, and the material (target) surface.
:
filter: discriminates between false echoes from
acoustical and electrical noise and the material
(target) surface.
fail-safe establishes the `Waiting' period from the time a
timer: loss of echo or operating fault condition starts
until the fail-safe default is effected. Adjusting
the speed of response will set the fail-safe
timer to the default values in the chart. If a
different response is required,adjust the ‘FSt’
option (see page 13).
measurement agitator fail-safe
SP response discrimination filter timer
1 m/min
1* on on 10 min
(3.3 ft/min)
5 m/min
2 on on 3 min
(16.4 ft/min)
3 immediate off off 3 min
0.03 m/min
4 on on 10 min
(0.1 ft/min)
* = factory setting.
To change the speed of response, obtain the `SP' display. Scroll
forward through the options (1-2-3) by pressing the "20" key. Scroll
backward through the options (3-2-1) by pressing the "4" key. When
the desired option is displayed, stop pressing the key. The display
will automatically return to the Run mode (6 sec).
speed of response
3 sec
current option
i.e. 1 m/min
option 2
i.e. 5 m/min
option 2
selected
6 sec
PL-517 The Probe Page 11
Alarm
The alarm adjustment assigns one of the following functions to the
relay.
O = loss of echo / fault alarm (factory setting)
The relay is energized with the contacts open during normal
operation (see Fail-safe on page 13).
Ø = process alarm
The non zero value entered becomes the alarm setpoint,
referenced to The Probe's sensor face. The relay de-
energizes and the contacts close when the material is within
the alarm zone. There is a hysterisis equivalent to 5% of the
empty calibration distance.
The Probe
blanking
alarm
setpoint
alarm zone
hysterisis
To change the alarm function or setpoint, obtain the `AL' display.
The setpoint may be increased by pressing the "20" key or
subsequently decreased by pressing the "4" key. When the display
has scrolled to the desired value, stop pressing the key. The display
automatically returns to the Run mode (6 sec).
alarm
3 sec
stored function
i.e. LOE / fault
adjust setpoint
i.e. 1.36 m
oops - too far!
decrease to
desired setpoint
i.e. 1.35 m
new alarm value
6 sec
Note:
For faster scrolling, hold the key depressed during the setpoint
adjustment and release when the desired value is obtained.
Page 12 The Probe PL-517
Fail-Safe
In the event a loss of echo or fault condition exceeds the `Waiting'
period (see Speed of Response on page 11 or Fail-safe Timer
below), the ` ? ' icon appears and one of the following fail-safe
defaults is immediately effected.
p i
FLS default mA mA reading
1 full 22 4 hold
2 empty 4 22 hold
3* hold hold hold hold
p= proportional span
i= inversely proportional span
*= factory default
To change the fail-safe default obtain the `FLS' display. Scroll
forward through the options (1-2-3) by pressing the "20" key. Scroll
backward through the options (3-2-1) by pressing the "4" key. When
the desired option is displayed, stop pressing the key. The display
will automatically return to the Run mode (6 sec).
fail-safe
3 sec
current option
i.e. full
option 2
i.e. empty
option 2
selected
6 sec
Fail-Safe Timer
The fail-safe timer allows the user to vary the ‘waiting’ period from
the time a loss of echo or operating fault condition begins, until the
fail-safe default is effected. The ‘waiting’ period is adjustable from 1
to 15 minutes, in 1 minute increments.
The fail-safe timer value will default to settings determined by the
speed of response (see page 11). If a different value is desired, the
fail-safe timer should be adjusted after the speed of response is set.
To change the fail-safe timer, obtain the ‘FSt’ display. Increase the
‘waiting’ period by pressing the “20” key, and decrease it by
pressing the “4” key, stopping when the desired value is displayed.
The display automatically reverts to the Run mode (6 sec).
PL-517 The Probe Page 13
Units
The units of the measurement reading can be selected as follows:
1 = metres, m (factory setting)
2 = feet, ft
The selected units are also applicable to the `Blanking' and `Alarm'
adjustments.
To change the units obtain the `Un' display. Scroll forward through
the options ( 1 - 2 ) by pressing the "20" key. Scroll backward
through the options ( 2 - 1 ) by pressing the "4" key. When the
desired option is displayed, stop pressing the key. The display will
automatically return to the Run mode (6 sec).
units
3 sec
current option
i.e. m
option 2
i.e. ft
option 2
selected
6 sec
Hart® Communication
General
It is assumed that the user is knowledged in the theory and
®
application of the HART field communication protocol. If not, contact
®
the HART Communication Foundation . ( 512-794-0369 U.S.A.)
Expanded Device Type Code:
• manufacturer identification code = 88
• manufacturer device type code = 200
• expanded device type code = 22728
Physical Layer Information :
• field device category = C
• capacitance number (CN) = 1
Miscellaneous :
• multidrop mode is supported
• burst mode is not supported
Online Menu
®
The HART Probe communication online menu in the Supplement
section is configured for a Rosemount model 275 hand held
communicator programmed with the Milltronics device description.
Page 14 The Probe PL-517
Supplement
Loading vs. Supply Voltage
Troubleshooting
The echo is not reliable and The Probe is
waiting for a valid echo before updating the
measurement.
Probable causes are:
• material or object in contact with sensor
face
• The Probe is too close to the fill point
• The Probe is not perpendicular to the liquid
surface
• change in level too fast
• measurement out of range
• foam on liquid surface
• high level of vibration in the mounting
structure
• level inside the blanking zone
The `Waiting' period has expired. Investigate
the probable causes listed above.
Refer to Speed of Response on page 11 or Fail-
safe Timer on page 13 for duration of `Waiting'
periods.
PL-517 The Probe Page 15
Hart ® Communication Online Menu
Universal Commands Supported:
0, 1, 2, 3, 6, 11, 12, 13, 14, 15, 16, 17, 18, 19.
Common Practice Commands Supported:
35, 36, 37, 38, 40, 41, 42, 44, 45, 46, 48, 49, 59.
Transmitter Specific Commands Supported:
128 / 129 read / write materials of construction
130 / 131 read / write blanking distance
132 / 133 read / write speed of response
134 / 135 read / write alarm selection
136 / 137 read / write fail-safe alarm level
Not available with generic device description.
Page 16 The Probe PL-517
PL-517 The Probe Page 17
Maintenance
The Probe requires no maintenance or cleaning.
Tefzel®
®
Tefzel is a fluoropolymer inert to most chemicals. For exposure to
specific environments, check with chemical compatibility charts
before installing and operating The Probe in your application.
®
Tefzel is a registered trade mark of DuPont.
Patents
Instrument Housing Design:
• Canada: 70345
• U.S.A.: 07/858/707
• Germany: M92022723
• U.K.: 2021748
• France: 921873
• Japan: 966217
Electronics / Sensor:
• U.S.A.: 5,267,219
5,339,292
• U.K.: 2,260,059
• patent applications in U.K., Canada, Europe, Africa, Australia
Page 18 The Probe PL-517
Specifications
Power:
{ 18 to 30 V dc, 0.2 A max
Environmental:
{ location: { indoor / outdoor
{ altitude: { 2000 m max.
{ambient { continuous: -40 to 60°C (-40* to 140°F)
temperature -20°C (-5°F) if metal mounting
{ relative humidity: { suitable for outdoor (Type 4X / NEMA 4X / IP65
enclosure)
{ installation category: { II
{ pollution degree: { 4
{ process pressure { vented to atmosphere
Range:
{ series 861: { 0.25 to 5 m ( 0.8 to 16.4 ft )(liquids only)
{ series 862: { 0.25 to 8 m ( 0.8 to 26.2 ft )
Beam Angle:
{ 10° at -3 dB boundary
Memory:
{ non-volatile EEPROM, no battery required
Programming:
{ 2 tactile keys
Temperature Compensation:
{ built-in to compensate over the operating range.
Display:
{ liquid crystal
{ three 9 mm (0.35") digits for reading of distance between sensor face and
material
{ multisegment graphic for operation status
Output
{ mA: { range: 4 – 20 mA
{ span: proportional or inversely proportional
{ accuracy: 0.25% of full scale
{ resolution: 3 mm (0.125")
{ loading: 750 ohms max at 24 V dc supply
{ Relay: { 1 normally closed contact rated at 5 A at 2 50 V ac non-
inductive or 24 V dc
{ fault on power, application or device failure
{ Communication: { HART® protocol 5.2 (optional)
Construction:
{ combined sensor and electronics package
{ sensor housing: { material: { Tefzel® or Kynar-Flex ®
{ mounting:
{ threaded: { 2" NPT, 2" BSP PF2
{ flanged: { flange adapter, threaded Probe to 3"
ANSI, DIN 65PN10 and JIS 10K3B
{ sanitary: { 4" FDA approved sanitary ferrule with
(series integral sealing ring c/w 304 stainless
861 only) steel clamp
{ electronics { material: { PVC
housing: { access: { hinged lid
{ 22 mm (0.87") dia. `knock out' for
conduit entrance, 2 places
{ 6 screw terminal block for 2.5 mm 2
2
(14 ga) solid wire / 1.5 mm (16 ga)
stranded wire max
Enclosure Rating:
{ IP 65 / NEMA 4 / CSA Type 4
Weight:
{ 1.7 Kg (3.7 lb)
Approvals:
{ CE*, FM CSA NRTL/C
* EMC performance available on request.
PL-517 The Probe Page 19
Siemens Milltronics Process Instruments Inc.
1954 Technology Drive, P.O. Box 4225
Peterborough, ON. Canada K9J 7B1 *7ml19981ah02*
Tel: (705) 745-2431 Fax: (705) 741-0466
www.milltronics.com Printed in Canada
