testo 300/testo 300 LL NEXT LEVEL – flue gas analyzer

Instruction manual
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 Contents

Contents
1 About this document ...........................................................................7
1.1 Symbols .................................................................................................7
1.2 Warning notices......................................................................................7
2 General safety instructions .................................................................8
3 Product-specific safety instructions ................................................10
4 Disposal ..............................................................................................11
5 Products with wireless technology ..................................................11
6 Storage ................................................................................................12
7 Authorisations and certification .......................................................12
8 EU declaration of conformity ............................................................12
9 Specifications .....................................................................................13
10 Product description ...........................................................................14
10.1 Front view.............................................................................................14
10.2 Rear view .............................................................................................15
10.3 Connections .........................................................................................16
10.4 Compact flue gas probe .......................................................................16
10.5 Modular flue gas probe.........................................................................17
11 First steps ...........................................................................................18
11.1 Commissioning .....................................................................................18
11.2 Mains unit/energy storage unit .............................................................18
11.2.1 Charge energy storage unit ..................................................................18
11.2.2 Mains operation ....................................................................................19
11.3 Touchscreen operating concept ...........................................................19
11.4 Keypad .................................................................................................20
11.5 Switching the instrument on and off .....................................................21
11.6 Connect probes ....................................................................................21
11.7 Connecting Smart Probes and testo Smart App ...................................23
11.7.1 Attaching the testo Bluetooth® Connector (0554 3004) ........................23
11.7.2 Smart Probes compatible with the instrument ......................................25
11.7.3 Establishing a connection with the testo Smart App .............................25
11.7.3.1 App user interface ................................................................................26
11.7.3.2 Measurement menu – testo 300 Second Screeen ...............................26
11.7.4 Connecting for the first time .................................................................27
11.7.5 Carrying out the measurement .............................................................28
11.7.6 Settings – language..............................................................................28
11.7.7 Help and Information ............................................................................29
11.7.7.1 Instrument information..........................................................................29
11.7.7.2 Tutorial .................................................................................................29
Contents

11.7.7.3 Exclusion of liability.............................................................................. 29

12 Using the product .............................................................................. 30
12.1 User interface ...................................................................................... 30
12.1.1 List reading display type ...................................................................... 31
12.1.2 Graphics reading display type.............................................................. 32
12.1.3 Corestream reading display type ......................................................... 33
12.2 Overview of main menu ( ) ............................................................ 34
12.2.1 Customer / Measuring site ................................................................... 36
12.2.2 Protocols .............................................................................................. 38
12.2.3 Saved reports ...................................................................................... 40
12.2.4 Second Screen .................................................................................... 42
12.2.5 Gas path check .................................................................................... 42
12.2.6 Device settings .................................................................................... 42
12.2.6.1 Country version and language ............................................................. 42
12.2.6.2 Wireless LAN ....................................................................................... 44
12.2.6.3 Date/Time ............................................................................................ 45
12.2.6.4 Own company address ........................................................................ 47
12.2.6.5 Hotspot ................................................................................................ 47
12.2.6.6 Rechargeable battery management..................................................... 48
12.2.6.7 Display brightness ............................................................................... 48
12.2.6.8 Manage e-mail accounts ...................................................................... 48
12.2.6.9 CO/NO sensor protect ......................................................................... 48
12.2.6.10 NO2 addition ............................................................................... 49
12.2.6.11 O2 reference ................................................................................ 49
12.2.6.12 Alarm limits .................................................................................. 49
12.2.7 Sensor diagnosis ................................................................................. 50
12.2.8 Error list ............................................................................................... 50
12.2.9 Device information ............................................................................... 50
12.2.10 Server information ............................................................................... 50
12.2.11 E-mail .................................................................................................. 50
12.2.12 My Apps ............................................................................................... 52
12.2.13 Help ..................................................................................................... 53
12.2.13.1 Device registration ....................................................................... 53
12.2.13.2 Tutorial ........................................................................................ 53
12.2.13.3 Setup Wizard ............................................................................... 53
12.2.13.4 Wireless firmware update ............................................................ 54
12.2.13.5 Update via USB ........................................................................... 56
 Contents

13 Performing the measurement............................................................58

13.1 Prepare for measurement ....................................................................58
13.2 Zeroing phases.....................................................................................58
13.3 Carry out gas path check .....................................................................59
13.4 Use of flue gas probe ...........................................................................59

13.5 Overview of measurement types ( ) .............................................60

13.5.1 Flue gas ...............................................................................................61
13.5.2 Draught ................................................................................................64
13.5.3 CO undiluted ........................................................................................65
13.5.4 Smoke number .....................................................................................65
13.5.5 Differential pressure .............................................................................65
13.5.6 Differential temp. ..................................................................................66
13.5.7 O2 supply air .........................................................................................69
13.5.8 Gas flow ...............................................................................................69
13.5.9 Oil flow rate ..........................................................................................70
13.5.10 CO ambient ..........................................................................................70
13.5.11 Tightness test 1 ....................................................................................71
13.5.12 Serviceability ........................................................................................72
13.5.13 Let by test.............................................................................................74
13.5.14 4 Pa measurement ...............................................................................75

13.6 Overview of options ( ) .................................................................79

13.6.1 Edit view ...............................................................................................79
13.6.2 Zeroing Gas Sensors ...........................................................................81
13.6.3 Mean value calculation .........................................................................82

13.7 Overview of protocols ( ) ...............................................................83

13.7.1 Print data ..............................................................................................84
13.7.2 Save .....................................................................................................84
13.7.3 Finish protocol ......................................................................................85
14 Maintenance........................................................................................87
14.1 Service .................................................................................................87
14.2 Calibration ............................................................................................87
14.3 Check instrument status .......................................................................87
14.3.1 Sensor diagnosis ..................................................................................87
14.3.2 Error list ................................................................................................87
14.4 Clean the measuring instrument ..........................................................87
14.5 Drain condensate container .................................................................88
Contents

14.6 Open the measuring instrument........................................................... 89

14.7 Replace sensors .................................................................................. 91
14.7.1 Replace O2 sensor .............................................................................. 91
14.7.2 Change CO, CO H2 and NO sensor .................................................... 92
14.8 Clean modular flue gas probe .............................................................. 93
14.9 Replace the probe module ................................................................... 94
14.10 Check/replace particle filter ................................................................. 94
14.11 Replace thermocouple ......................................................................... 95
15 Technical data .................................................................................... 97
16 Contact and support........................................................................ 100
 1 About this document

1 About this document

• The instruction manual is an integral part of the instrument.
• Keep this documentation to hand so that you can refer to it when necessary.
• Please read this instruction manual through carefully and familiarize yourself
with the product before putting it to use.
• Hand this instruction manual on to any subsequent users of the product.
• Pay particular attention to the safety instructions and warning advice in order
to prevent injury and damage to the product.

1.1 Symbols
Display Explanation
Note: basic or further information

1 Action: several steps, the sequence must be followed.

2
…
 Result of an action
 Requirement

1.2 Warning notices

Always pay attention to any information marked with the following warning
notices along with warning pictograms. Implement the specified precautionary
measures!

DANGER
Risk of death!

WARNING
Indicates possible serious injury.

CAUTION
Indicates possible minor injury.

CAUTION
Indicates possible damage to equipment.

7
2 General safety instructions

2 General safety instructions

• Only operate the product properly, for its intended purpose, and within the
parameters specified in the technical data.
• Do not apply any force.
• Do not operate the product if there are signs of damage on the housing,
mains unit or connected cables.
• Only use the product in closed, dry rooms and protect it from rain and
moisture.
• The product must be checked for any visible damage before commissioning.
• Dangers may also arise from objects to be measured or the measuring
environment. Always comply with the locally valid safety regulations when
carrying out measurements.
• Only perform maintenance and repair work on this instrument that is
described in this documentation. Follow the prescribed steps exactly when
doing the work.
• Any additional work must only be carried out by authorized, qualified
personnel. Otherwise, Testo will refuse to accept responsibility for the proper
functioning of the product after repair and for the validity of approvals.
• Maintenance work that is not described in this documentation must only be
carried out by trained service engineers.
• Safety instructions for patients with an implanted cardiac pacemaker when
using Testo products with magnets
o Handle instruments or accessories containing a magnet with care and
keep them in a safe place.
o Maintain a distance of 20 cm between your implant and the magnet
which is incorporated into the instrument or accessories.
• Keep a safe distance from products which could be damaged by the effects
of magnetism (e.g. monitors, computers, pacemakers or credit cards).
• Use only original spare parts from Testo.
• Temperature information given on probes/sensors relates only to the
measuring range of the sensor technology. Do not expose handles and
supply lines to temperatures above 45°C (113°F), unless they are explicitly
approved for higher temperatures.

8
 2 General safety instructions

WARNING
Risk of burns due to hot probes, probe shafts and sensor tips!
 Do not get hold of hot parts (> 45°C/113°F) with bare hands
immediately after a measurement.
- In the event of burns, immediately cool the relevant spot with cold water and
consult a doctor if necessary.
Allow probes, probe shafts and sensor tips to cool down.

• The product must not be used in potentially explosive atmospheres, if it is

not explicitly approved for these areas.
• Do not carry out any contact measurements on uninsulated, live parts.
• Do not expose the product to any extremely high or low temperatures. Avoid
temperatures below -5°C or above 45°C. The exception is when a product
has been explicitly approved for other temperatures.
• Protect the product from dust and dirt. Make sure that it is not exposed to an
environment with dust, dirt, sand, etc.
• Prevent the product from falling.
• If operator safety can no longer be guaranteed, the product is to be taken
out of service and secured against inadvertent use. This is the case if the
product:
o is obviously damaged
o has fractures on the housing
o has faulty measuring cables
o has leaking batteries
o no longer performs the required measurements
o has been stored for too long in unfavourable conditions
o has been exposed to mechanical stresses in transit

9
3 Product-specific safety instructions

3 Product-specific safety instructions

DANGER
Integrated magnet
Danger to life for persons with pacemakers!
- Keep a distance of at least 20 cm between your pacemaker and the
measuring instrument.

ATTENTION
Integrated magnet
Damage to other devices!
- Keep a safe distance from devices that may be damaged by magnetism
(e.g. monitors, computers, credit cards, memory cards, etc.).

CAUTION
The condensate may be acidic.
Risk of burns to the hands!

- Wear acid-resistant safety gloves, glasses and overalls to empty the

condensate.

• Make sure that the condensate has been fully emptied out of the condensate
trap before the measuring instrument is stored for a long time.
• Before disposing of the product, the condensate trap must be emptied and
the condensate in the crude gas tube disposed of in a suitable container.
• When testing a gas pipe, pay attention to the following:

WARNING
Dangerous mixture of gases

Danger of explosion!

- Make sure there are no leaks between the sampling point and the measuring
instrument.
- Do not smoke or use naked flames during the measurement.

10
 4 Disposal

CAUTION
Acid in the sensors.
May cause chemical burns.

- Do not open the sensors.

Eye contact: Rinse the affected eye thoroughly under running water for 10
minutes, keeping the eyelids wide open and protecting the unaffected eye.
Remove contact lenses wherever possible.

CAUTION
Acid in the sensor filters.
May cause irritation to the skin, eyes or respiratory tract.

- Do not open the sensor filters.

Eye contact: Rinse the affected eye thoroughly under running water for 10
minutes, keeping the eyelids wide open and protecting the unaffected eye.
Remove contact lenses wherever possible.
Skin contact: Remove the injured person’s contaminated clothing, ensuring
self-protection. Rinse affected skin areas under running water for at least 10
minutes.
Inhalation: Move to fresh air and make sure that breathing is unrestricted.
Ingestion: Rinse mouth out and spit out liquid. If conscious, drink 1 glass of
water (approx. 200 ml). Do not induce vomiting.

4 Disposal
• Dispose of faulty energy storage units in accordance with the valid legal
specifications.
• At the end of its useful life, deliver the product to the separate collection
point for electric and electronic devices (observe local regulations) or return
the product to Testo for disposal.

• WEEE Reg. no. DE 75334352

5 Products with wireless technology

Changes or modifications that have been made without the explicit consent of
the competent approval authority may lead to cancellation of the type approval.
Data transfer may be disturbed by equipment that uses the same ISM band.
Places where the use of radio communication links is not permitted include
aeroplanes and hospitals. For this reason, the following points must be ensured
before entering:

11
6 Storage

• Switch the instrument off.

• Disconnect the instrument from any external power sources (mains cable,
external energy storage units, etc.).

6 Storage
• Keep the product away from any liquids and do not put it into water. Protect
it from rain and humidity.
• Do not store the product together with solvents.

7 Authorisations and certification

Please find the current country approvals in the attached document.
Please note the following country-specific information for the product
authorization.
The use of the wireless module is subject to the regulations and
stipulations of the respective country of use and the module may only
be used in countries for which a national certification has been granted.
The user and every owner has the obligation to adhere to these
regulations and prerequisites for use and acknowledges that the re-
sale, export, import, etc., in particular in, to or from countries without
wireless authorization, is their responsibility.

8 EU declaration of conformity
You can find the EU declaration of conformity on the Testo website,
www.testo.com, under the product-specific downloads.

12
 9 Specifications

9 Specifications
The testo 300 NEXT LEVEL is a measuring instrument which enables the
professional flue gas analysis of combustion systems, such as
• small combustion plants (oil, gas, wood, coal)
• low-temperature and condensing boilers
• gas heaters.
.
Using the instrument, these systems can be adjusted and checked for
compliance with the applicable limit values.
The instrument has been verified as a short-term measuring instrument and
should not be used as a safety (alarm) device. It is intended for indoor use only.
The following tasks can also be carried out using the instrument:
• Regulating the O2, CO and CO2, NO, NOx values in combustion plants to
ensure optimum operation.
• Draught measurement.
• 4Pa measurement.
• Measuring and regulating the gas flow pressure in gas heaters.
• Measuring and optimising the flow and return temperatures of heating
systems.
• Measuring the CO concentration in the ambient air.
• The instrument can be used for measurements on CHP plants in accordance
with the first German Federal Immission Control Ordinance (BImschV).
• In principle, the CO sensor can also be used for measurements on CHP
plants. If you carry out more than 50 measurements on CHP plants per year,
please contact your nearest Testo service centre or send the instrument to
Testo Service for checking.
An NOx filter for the CO sensor can be ordered as a spare part to replace a used
filter.

13
10 Product description

10 Product description
10.1 Front view

1 USB interface/ 4 User interface

mains connection
2 Gas outlet 5 Condensate container
3 On/Off button 6 Connections

14
 10 Product description

10.2 Rear view

1 Attachment point for carrying 2 Magnets

strap
Explanation of icons

IMPORTANT
Magnetic field
Damage to other devices!
- Keep a safe distance away from products that could be
damaged by the effects of magnetism (e.g. monitors,
computers or credit cards).

At the end of its useful life, deliver the product to the separate
collection point for electric and electronic devices (observe local
regulations) or return the product to Testo for disposal.
testo 300 NEXT LEVEL complies with the Korean safety
standard.
testo 300 NEXT LEVEL is Bluetooth-enabled

15
10 Product description

China RoHS

10.3 Connections

1 Probe connections for additional 3 Flue gas socket

probes and testo Bluetooth®
Connector
2 Integrated ambient air probe 4 Differential pressure
measurement connection
There must be no more than one extension lead (0554 1201)
connected between flue gas socket and flue gas probe.

10.4 Compact flue gas probe

1 Removable filter chamber with 3 Connector plug for measuring

window and particle filter instrument
2 Probe handle 4 Connection cable

16
 10 Product description

10.5 Modular flue gas probe

Removable filter chamber with Connector plug for measuring

1 4
window and particle filter instrument
2 Lock release 5 Probe handle
3 Probe module 6 Connection cable

17
11 First steps

11 First steps
11.1 Commissioning
Take the information in the testo information document (included with the
product) into account for this.

11.2 Mains unit/energy storage unit

The measuring instrument is supplied with an energy storage unit.
Fully charge the energy storage unit before using the measuring
instrument.

If the measuring instrument is completely discharged, allow at least 30

minutes to charge before switching the measuring instrument on and
using it again.

If the mains unit is connected, the measuring instrument is

automatically powered via the mains unit.

Only charge the energy storage unit at an ambient temperature of 0 to

35 °C.

Storage conditions for the energy storage unit:

• Ambient temperature from 10 to 20°C
• Charge level of 50 to 80%

11.2.1 Charge energy storage unit

1 Connect the instrument plug of the mains unit to the mains unit socket
on the measuring instrument.

2 Connect the mains plug of the mains unit to a mains socket.

 The charging process starts. LED in

the condensate trap flashes red.
The charging process stops
automatically when the energy
storage unit is fully charged. LED in
the condensate trap has a continuous
red light.
If the energy storage unit has discharged completely, the charging time
at room temperature is approx. 5-6 hrs.

18
 11 First steps

11.2.2 Mains operation

1 Connect the instrument plug of the mains unit to the mains unit socket
on the measuring instrument.

2 Connect the mains plug of the mains unit to a mains socket.

 The measuring instrument is powered via the mains unit.

 If the instrument is switched off and an energy storage unit is inserted,

the charging process will start automatically. Switching the measuring
instrument on stops the charging of the energy storage unit and the
measuring instrument is powered via the mains unit.

For longer measurements involving mains operation, Testo

recommends using a combustion air temperature probe with connection
cable. Self-heating of the instrument during mains operation may
influence the combustion air temperature measurement using a mini
ambient air probe.

11.3 Touchscreen operating concept

Familiarize yourself with the touchscreen operating concept before you use the
measuring instrument.
Actions are mostly carried out by:

Description
Tapping
To open applications, select menu symbols,
press buttons on the display or enter characters
with the keypad, in each case tap these with a
finger.

Swiping
Swipe to the right or left on the display to show
further views, e.g. to switch from the list view to
the graphic view.

19
11 First steps

Description
Zooming
In order to make a section of the display larger
or smaller, touch the display with two fingers
and move them apart or together.

Dragging
You can move an element by touching it,
holding it and dragging it to the required
position.
Example: Changing the display sequence of the
measurement parameters.

11.4 Keypad
Some functions require values (figures, numerical value, unit, characters) to be
entered. The values are entered via a keypad.

 Input field is enabled (flashing cursor)

1 Enter value: tap the required value
on the display (figures, numerical
value, unit, characters).

2
Confirm entry: Press .

3 Repeat steps as required.

20
 11 First steps

11.5 Switching the instrument on and off

Current Action Function
status
Instrument Press the button for Instrument is switched on.
off a long time (> 3 s)
When the measuring instrument is started for the first time, the setup
wizard guides you through the following setting parameters step by
step:
- Country version
- Language
- WLAN
- Date and Time
- Own company address
- E-mail account
A tutorial can be started after the setup wizard.
The tutorial demonstrates the general operation and the most important
functions of the measuring instrument using examples.
Instrument Press the button Instrument is switched to standby mode.
on briefly (< 1 s) The instrument is re-activated when the
button is pressed again.
Instrument Press the button for Selection: [OK] Instrument is switched
on a long time (>1 s) off or cancel the instrument being
switched off with [Cancel].
Standby mode has 3 time-dependent functions:
• Standby time up to 1 min: Immediate restart after pressing the key.
• Standby time up to 1 hour: After pressing the key, a restart takes
place after 5 seconds.
• Standby time more than 1 hour: testo 300 NEXT LEVEL is in power
save mode. After pressing the key, a restart takes place after the
zeroing phase.
Unsaved readings are lost when the measuring instrument is switched
off.

11.6 Connect probes

Flue gas probes

 Instrument is switched on.

21
11 First steps

1 Insert the connector plug into the flue

gas socket and lock it in place by
turning it slightly clockwise (bayonet
lock).

There must be no more than one extension line (0554 1201) between
measuring instrument and flue gas probe.

Temperature adapter

 Instrument is switched on.

1 Insert the connector plug of the
probe into the probe socket.

 System recognizes the probe (info is displayed).

The parameter which is measured with an external probe is identified

on the display by "ext.".

22
 11 First steps

11.7 Connecting Smart Probes and testo

Smart App
The testo 300 NEXT LEVEL has the option of establishing a Bluetooth®
connection with wireless probes via the testo Bluetooth® Connector as well as a
connection to the testo Smart App at the same time.
If the testo 300 NEXT LEVEL is used with Smart Probes, they must be
at least 20 cm apart.

11.7.1 Attaching the testo Bluetooth® Connector

(0554 3004)
Once the testo Bluetooth® Connector is plugged in, all the warning and
safety instructions for the testo 300 NEXT LEVEL apply.

WARNING
Danger of suffocation!
The testo Bluetooth® Connector is a small part that can be swallowed.
Keep out of reach of children.

1 Connect the testo Bluetooth®

Connector to the TUC 1 or TUC 2
socket on the testo 300 NEXT
LEVEL.

 When connected, a testo Bluetooth® Connector icon appears in the

testo 300 NEXT LEVEL status display.

 You can now connect up to 4 Smart Probes to the testo 300 NEXT
LEVEL at the same time.

23
11 First steps

2 Press the ON button on the Smart

Probe.

 The LED flashes yellow while connecting via Bluetooth® and then
flashes green when the connection is established.

 Once the Smart Probe is connected

with the testo 300 NEXT LEVEL, this
reading appears on the display. The
product name and the product ID (last
three digits of the serial number)
indicate at a glance which Smart
Probe is providing the reading. The
readings are transmitted to the testo
300 NEXT LEVEL in fixed measuring
cycles of 1 second.

If the testo 300 NEXT LEVEL receives no new measuring value at the
expected receiving time, e.g.:
- the Smart Probe is outside the connection range
- another problem causes an interrupted connection
no more readings are shown on the testo 300 NEXT LEVEL (display: "--
--")

Carrying out the normal testo 300 FW update is sufficient to update the
testo Bluetooth® Connector. The testo Bluetooth® Connector then
receives the update when the testo 300 NEXT LEVEL is next switched
off. This means that every testo Bluetooth® Connector with an older
version is updated during switch-off. This is indicated by the continuous
red flashing condensate trap.

24
 11 First steps

11.7.2 Smart Probes compatible with the

instrument
Order number Designation
0560 2115 02 testo 115i - clamp thermometer with smartphone
operation
0560 1510 testo 510i - differential pressure measuring instrument
with smartphone operation
0563 3915 testo 915i - temperature probe with smartphone
operation

11.7.3 Establishing a connection with the testo

Smart App
In order to establish a connection, you need a tablet or smartphone with
the testo App already installed on it.
You can get the App for iOS instruments in the App Store or for Android
instruments in the Play Store.
Compatibility:
• Requires iOS 12.0 or later/Android 6.0 or later.
• Requires Bluetooth® 4.0.
• Requires in testo 300 software version V12.7 or newer & firmware
version V1.10 or newer.

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11 First steps

11.7.3.1 App user interface

Element Element
1 Main menu 2 Readings from testo 300 NEXT
LEVEL
3 Instrument status bar 4 Configuration
5 Current testo 300 NEXT LEVEL 6 Fuel selected in testo 300 NEXT
instrument status LEVEL
7 Create measurement report 8 Remote measurement start/stop
on testo 300 NEXT LEVEL
9 Remote save of measurement on
testo 300 NEXT LEVEL

11.7.3.2 Measurement menu – testo 300 Second Screeen

The testo Smart App features several stored measurement programs.
Depending on the measurement task, these enable the user to configure and
carry out the measurement conveniently. To use the testo 300 NEXT LEVEL
with the testo Smart App, only the measurement program testo 300 Second
Screen is relevant.

Basic view
In the Basic View application menu, the current measured values can be read,
recorded and saved. The basic view is particularly suitable for quick and simple
measurements. All Bluetooth® probes (apart from testo 300 NEXT LEVEL)
compatible with the testo Smart App are displayed in the basic view.

26
 11 First steps

testo 300 Second Screen

With the testo 300 Second Screen measurement program, all measurement
data of the testo 300 NEXT LEVEL can be transferred to the smartphone or
tablet and the measurement can be controlled from both devices.
11.7.4 Connecting for the first time
1 Click on Measure.

2 Click on the testo 300 Second Screen.

 The following window opens.

3 Follow the instructions and enter the pin in the field provided.

For detailed information on how to obtain the pin, see section 8.2.4
Second Screen.

The PIN only needs to be entered when connecting for the first time.
After that, the configured testo 300 NEXT LEVEL is automatically
recognised by the testo Smart App and the connection is established.

4 Click on Apply Configuration.

 The connection is automatically established.

27
11 First steps

11.7.5 Carrying out the measurement

1 Open the testo Smart App.

2 Click on Measure.

3 Click on the testo 300 Second Screen measurement program.

 The connection to the testo 300 NEXT LEVEL is automatically

established (this may take a few seconds).
Once the connection has been established between the App and
testo 300 NEXT LEVEL, the App will be in Second Screen mode. This
represented by a yellow frame in the App. This means that all
measurement data from the testo 300 NEXT LEVEL is mirrored on the
App. The measurement can now be controlled from both instruments.
4 Click on required activity:
• Start measurement: click on Start.
• Stop measurement: click on Stop.
• Request the measurement report from testo 300 NEXT LEVEL: click
on Request PDF from testo 300.
• Save measurement on the testo 300 NEXT LEVEL: Click on Save.

No other measuring apps from the Smart App can be used while the
connection is being established.

To establish a connection, the Smart App connection must be activated

on the testo 300 NEXT LEVEL.

To establish a connection, the WLAN must be activated on the

smartphone/tablet.

11.7.6 Settings – language

1 Click on Settings.

 The Settings menu opens.

2 Click on Language.

 A window with different languages opens.

28
 11 First steps

3 Click on the required language.

 The required language is set.

11.7.7 Help and Information

Under Help and Information, you will find information about the testo Smart App.
The stored tutorial can be called up and implemented. This also where legal
information can be found.
11.7.7.1 Instrument information
1 Click on Help and Information.

 The Help and Information menu opens.

2 Click on Instrument information.

 The current App version, Google Analytics instance ID, refrigerant

version and update are displayed for the connected instrument.
Automatic updates for instruments can be enabled or disabled.
> Use the slider to activate or deactivate Update for connected
instruments.

11.7.7.2 Tutorial
1 Click on Help and Information.

 The Help and Information menu opens.

2 Click on Tutorial.

 The tutorial shows you the most important steps prior to

commissioning.

11.7.7.3 Exclusion of liability

1 Click on Help and Information.

 The Help and Information menu opens.

2 Click on Exclusion of liability.

29
12 Using the product

 The data protection information and licence usage information is

displayed.

12 Using the product

12.1 User interface

1 Measuring applications
2 Status bar
3 Main menu
4 Open Fuels selection list
5 Select Customer/Measuring site
Select reading display type:
• List
6 • Chart
• Corestream
7 Edit measurement data
Start measurement
8 Pause measurement
Stop measurement
9 Options

Further symbols on the user interface (without numbering)

30
 12 Using the product

Retry measurement
One level back
One level back
One level back
Cancel process
Print values

Save report

Save and send report

Generate QR code

12.1.1 List reading display type

The measurement parameters/units and the number and order of the

measurement parameters displayed in the List reading display type can be set,
see Section Edit View.
Only those measurement parameters and units that are enabled in the reading
display appear in the reading display, in the saved measurement protocols and
on the report printouts.
The settings only apply to the measurement type currently enabled.

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12 Using the product

12.1.2 Graphics reading display type

In the Graphics reading display type, the reading progression can be displayed
as a line diagram.
A maximum of 4 measurement parameters can be set at any one time. Only
those measurement parameters/units can be displayed that are available in the
List reading display type.
The measurement parameters/units can be adjusted if necessary:

 Measurement view is enabled.

1 Call up function: Graphics

2 Tap on in order to open selection list for measurement

parameters/units.

3 Select desired measurement data / units.

 Selection is accepted automatically.

32
 12 Using the product

12.1.3 Corestream reading display type

Search for corestream:

 Measurement view is enabled.

1 Call up function: Corestream

2 Start search:

3 Perform zeroing.

 The measurement starts automatically after zeroing.

4 Align the flue gas probe in the flue gas

duct so that the probe tip is in the
corestream (area of the highest flue
gas temperature Max FT).
- Grey value/grey pointer: Display
of current flue gas temperature
- Orange value/orange pointer:
Display of maximum flue gas
temperature
- Reset values/pointer:

33
12 Using the product

12.2 Overview of main menu ( )

Main menu Description

Customer/Measuring site Create, edit and delete customer and system
information.
Protocols Call up, delete and send measurements that
have been performed (various formats
possible).
Saved reports Call up and delete measurement report.

Second Screen Connection to the testo Smart App can be

activated or deactivated.
Gas path check For flawless operation of the measuring
instrument, regular tightness testing of
measurement systems (measuring
instrument + flue gas probe) is
recommended.

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 12 Using the product

Main menu Description

Device Settings Settings
- Country version and language
- WLAN
- Date & Time
- Own company address
- Hotspot
- Rechargeable battery management
- Display brightness
- Manage e-mail accounts
- CO/NO sensor protection
- NO2 addition
- O2 reference
- Alarm limits
Sensor Diagnosis Overview of the sensors fitted and their
condition.
Error List Call up error reports
Device information Information
- Device name
- Serial number
- Instrument identification number
- Last service
- Free memory
- Operating hours
- Operating hours since last service
- Software version
- Firmware version
- Firmware date
- qA version
- qA date
Server information Information about the available server

E-Mail Set up e-mail account and the e-mail

account can be called up.
To set up the e-mail account on the
testo 300 NEXT LEVEL the IMAP setting
in your e-mail account with your provider
must be activated. You can find more
information in your e-mail account itself,
e.g. under FAQs or Settings.

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12 Using the product

Main menu Description

My Apps Additional applications
- Alarm clock
- E-mail
- Gallery
- Browser
- Calendar
- Pocket calculator
- QuickSupport
- File manager
Help Aids
- Device Registration
- Tutorial
- Setup Wizard
- Help Online
- Testo website
- Update via USB

12.2.1 Customer / Measuring site

Create, edit and copy Customer / Measuring site information.
Customer / Measuring site can be deleted.
1 Call up function: | Customer / Measuring site

 Customer / Measuring site menu is displayed.

The following functions are available:

View/edit existing data about

1 Search 3
Customer / Measuring site
Create new Customer / Measuring
2
site
Search
1 Tap Search operating field.

36
 12 Using the product

 Text cursor flashes.

2 Enter search test using the text editor.

Via the search text, only the Customer / Measuring site is
displayed that contains characteristics of the search text.

3 Confirm search result: press .

Create new customer

1 Tap + New Customer / Measuring site.

 Customer input screen is opened.

2 Tap the required input field.

 Keypad appears.

3 Enter the information via the keypad.

4 Confirm each input with .

The Customer/Company Name input field is a required field and must

be filled in.

5 Save.

 Customer is created.

In order to be able to select a customer, at least one measuring site

must be created and selected!

Create new measuring site

 A customer is created.
1 Tap Measuring site button.

2 Tap + New measuring site operating field.

 Measuring site parameters menu is opened.

3 Enter data.

37
12 Using the product

The Name of measuring site input field is a required field and must be
filled in.

4 Confirm each input with .

An additional button (>) appears in some input fields.

These buttons contain a selection of parameters which are adopted in
the input field by tapping on them.

5 Save.

Edit customer
1 Tap customer.

 Customer input screen is opened.

2 Input fields can be edited.

Edit measuring site

 Customer input screen is open.

1 Tap Measuring site button.

2 Select Measuring site.

3 Edit data.

4 Save.

12.2.2 Protocols
1 Call up function: | Protocols

 Protocols menu is displayed.

2 Select customer.

3 Open measuring site.

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 12 Using the product

4 Measurements for the selected

customer/measuring site can be
viewed and deleted .
More options for selected
measurement :

Print readings

Save report

Save and send report

Generate QR code

The following information can be selected/added to create a report.

Category Description
Format and print Select output format(s):
- CSV (comma separated text file, e.g. for
Microsoft® Excel)
- PDF
- QR
- QR_ZIV
- ZIV 2.00 (XML file, complying with the
regulations of the Guild of Master Chimney
Sweeps in Germany).
Customer data Enter/add contact details.
Comments and pictures Enter comments and Add (opens the Gallery).
Pictures are only included when output is in PDF
format.

39
12 Using the product

Category Description
Select measurements All saved measurements are displayed in one of
the following time categories, depending on the
creation date: Today, Yesterday or Older.
The measurements selected to create the report
are identified with .
Signature Sign report.

5 Back to the main menu: tap

or
Back to the measurement menu: tap .

If you have saved more than 100 measurements, they can be stored in
the archive folder. A dialogue window appears automatically and you
can choose whether you want to create this archive folder or not.

12.2.3 Saved reports

The measurement reports that have been created are stored under Saved
reports. These can be called up again, sent or deleted.
1 Call up function: | Saved reports.

 The OI File Manager folder is opened and the available reports are
displayed.
Open report
1 Tap required report.

 Report is displayed as a PDF.

Delete report(s)
1 Touch required report for >2 sec.

40
 12 Using the product

 Report is marked.

2 If necessary, mark more reports by tapping.

3
Delete report(s): tap .

Send report(s)
1 Touch report for >2 sec.

 Report is marked.

2 If necessary, mark more reports by tapping

3
Tap symbol.

4 Tap Send.

5 Send report by e-mail.

Sort report(s)
1
Tap symbol.

2 Tap Settings.

3 Disable in ascending order under sort settings.

 The latest reports are displayed first.

41
12 Using the product

12.2.4 Second Screen

In the Second Screen menu item, the Smart App connection can be activated or
deactivated. This is also where the connection PIN required for the initial
connection is stored.
To connect the testo 300 NEXT LEVEL to your smartphone or tablet, the
Second Screen connection must be activated.
1 Call up function: | Second Screen

2 Tap the Smart App connection selection field to activate (

)/deactivate ( ).

3 When connecting to the testo Smart App for the first time: enter the
displayed connection PIN in the testo Smart App, under the testo 300
Second Screen measurement program.

4 Back to Main menu: tap .

12.2.5 Gas path check

For flawless operation of the measuring instrument, regular tightness testing of
measurement systems (measuring instrument + flue gas probe) is
recommended.
1 Call up function: | Gas path check

 Gas path check starts automatically.

2 Place the black sealing cap on the tip of the flue gas probe.

 The pump flow is displayed. If the flow rate is less than 0.02 l/min, the
gas paths are not leaking and the measurement is ended.
3 Remove the sealing cap from the probe tip.

4 Back to the main menu: tap .

12.2.6 Device settings

12.2.6.1 Country version and language
Set up your measuring instrument country-specifically.
The country version configuration affects the measurement parameters, fuels,
fuel parameters and the bases of and formulas for calculations that are enabled.

42
 12 Using the product

The country version configuration affects the user interface languages that can
be enabled.
1 Call up function: | Device Settings | Country version and
language

Set country version

1 Tap Country version selection field.

 The available country versions are displayed.

2 Select country version.

 The query Change country version? is displayed.

3 Tap Next.
Configuration of the country version can be ended by
cancelling. The display goes back to Device Settings.

 The selected country version is configured (this may take a few

minutes). The Device Settings menu is then displayed.

 Restart the measuring instrument to complete its configuration.

Set language
 Country & language settings menu

1 Tap Language selection field.

43
12 Using the product

 The available languages for the selected country version are

displayed.

2 Select Language and tap .

The instrument is reconfigured to the selected language.


1 Back to the main menu: tap and .

12.2.6.2 Wireless LAN

A radio link, such as a Wireless LAN, is not relevant for carrying out
measurements.

Set up a connection to a Wireless LAN router or a Wireless LAN hotspot. The

connection enables the sending of measurement reports on site by e-mail.
1 Call up function: | Device Settings | Wireless LAN.

2 Tap Wireless LAN selection field.

3 Enable Wireless LAN: tap Off button or move grey point to the right.

 Instrument switches to On. The point changes to green.

 Display of all available Wireless LAN routers or Wireless LAN hotspots

in the vicinity.

4 Select Wireless LAN router or Wireless LAN hotspot.

5 Tap Connect.

6 It may be necessary to enter the password for the selected Wireless

LAN.

 Connection is set up and shown by Connected.

Further entries via button

Category Description
Add network Enter network name using the keypad,
set security standard and if necessary enter
further options. Save entry.
Saved networks Display of saved networks.

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 12 Using the product

Category Description
Updating Updating the display of available networks.
Advanced Further Wireless LAN settings are displayed.

The Wireless LAN is disabled in standby mode and enabled again once
you quit standby mode. The enabling process may take a few seconds.

12.2.6.3 Date/Time
You can set the date, time and time zone in the Date/Time menu. You can
choose between the 24 hr or AM/PM formats for the time.
If the Wireless LAN has already been enabled, the Date/Time provided
by the network is automatically set.

1 Call up function: | Device

Settings | Date/Time.

 Various setting options are displayed. Depending on your

requirements, you can
• Enable ( ) / disable( ) selection fields by tapping
• Open other selection fields
• Enter parameters using the keypad
• Set 24 hr or AM/PM format: 24 hr ( ) / AM/PM ( )

2 Back to the Device Settings menu: Tap | | .

Set Date/Time manually

1 Tap Date/Time.

45
12 Using the product

2 Tap Autom. Date/Time.

3 Select Off.

 Autom. Date/Time is disabled. The pop-up window closes

automatically.

4 Tap Set Date.

5 Select date via the calendar and confirm with OK.

6 Tap Set Time.

7 Tap hour and set.

8 Tap minute, set and confirm with OK.

9 Back to the Device Settings menu: tap | | .

46
 12 Using the product

Set time zone manually

1 Tap Time Zone.

2 Tap Autom. Time Zone and disable ( ).

3 Tap Select time zone.

1 Select desired time zone.

2 Back to the Device Settings menu: tap | | .

12.2.6.4 Own company address

Enter own company address. This information will be shown on the reports.
1
Call up function: | Device Settings | Own company address

 Contact information input screen is opened.

2 Tap the required input field.

 Keypad appears.

3 Enter the information via the keypad.

4 Confirm each input with ✓.

5 Back to the Device Settings menu: tap .

12.2.6.5 Hotspot
Enable a hotspot in order to be able to transmit readings to software / industry
software.
The interface must also be available in the software / industry software.

Call up function: | Device Settings | Hotspot

1

2 By tapping the selection field, enable ( )/disable ( ) Hotspot.

3 Back to the Device Settings menu: tap .

47
12 Using the product

Edit hotspot name and password

1 Tap Hotspot settings.

2 Select Wireless LAN Hotspot.

3 Tap Set up Wireless LAN Hotspot.

4 Edit network name and password.

5 Tap Save.

6 Back to the Device Settings menu: tap .

12.2.6.6 Rechargeable battery management

1
Call up function: | Device Settings | Rechargeable battery
management

2 Select between the standby options by tapping the selection field.

3 Back to the Device Settings menu: tap .

12.2.6.7 Display brightness

Call up function: | Device Settings | Display brightness
1

2 Adjust the display brightness using the slide control.

3 Back to the Device Settings menu: tap .

12.2.6.8 Manage e-mail accounts

1
Call up function: | Device Settings | Manage e-mail accounts.

2 An e-mail account can be added by clicking on the plus icon.

3 Back to the Device Settings menu: tap .

12.2.6.9 CO/NO sensor protect

Limit values can be set to protect the CO/NO sensors against overload. Sensor
protect is enabled if these are exceeded:
• Fresh air dilution if exceeded (only for instruments with the "Dilution" option)

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 12 Using the product

• Shutdown if exceeded again

When dilution is enabled, the CO and CO undiluted values are
displayed in a blue font. A “*” is shown on the printout after the name of
both values to indicate dilution.

1
Call up function: | Device Settings | Sensor Protect

 CO input screen: Set Sensor Setting is opened.

2 Enter the alarm limit value via the keypad.

3 Confirm input with .

The limit values must be set to 0 ppm to disable sensor protect.

12.2.6.10 NO2 addition

1
Call up function: | Device Settings | NO2 addition

2 Enter the addition value using the keyboard.

3 Confirm the input with OK.

4 Back to the Device Settings menu: tap .

12.2.6.11 O2 reference
The O2 reference value of the current fuel can be set.
1
Call up function: | Device settings | O2 reference

 O2 reference current fuel input screen is opened.

2 Enter the value via the keypad.

3 Confirm input with .

4 Tap [OK].

12.2.6.12 Alarm limits

Alarm limits can be set for the CO Ambient measurement type. An audible
alarm signal is triggered when the alarm limit is reached.

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12 Using the product

1
Call up function: | Device Settings | Alarm limits

 Alarm limits input screen is opened.

2 Tap directly on the value in the relevant input field.

 Keypad appears.

3 Enter the value via the keypad.

4 Confirm each input with ✓.

5 Tap [OK].

12.2.7 Sensor diagnosis

Overview of the sensors fitted and their condition.

1
Call up function: | Sensor Diagnosis

12.2.8 Error list

Call up error reports.
1
Call up function: | Error list

12.2.9 Device information

Call up device information.
1
Call up function: | Device information

12.2.10 Server information

Information about the available server.
1
Call up function: | Server information

12.2.11 E-mail
Setting up an e-mail account
An e-mail account has to be set up in order to be able to send reports
as e-mails. A Wireless LAN connection must be available to set the
account up.

1
Call up function: | E-Mail

50
 12 Using the product

2 Enter e-mail address.

3 Enter password.

4 Set account options, such as synchronization interval

5 Entry of account name (optional) and name which appears with the
sent e-mails.

 The inbox of the e-mail account is opened.

If the system does not accept the e-mail address and password
combination, but you are certain it is correct, check the following
possible solutions:
• Open e-mail client, e.g. gmail, on a PC and check e-mail reception.
Your provider may have sent you a security e-mail that you need to
acknowledge before the e-mail account can be accepted on the
testo 300 NEXT LEVEL.
• Enable IMAP account
To do this, call up your e-mail account on the PC. You will find the
setting for the common e-mail providers, e.g. gmx, under settings -
POP/IMAP. Account-specific information about the enabling of the
IMAP account is supplied by the relevant provider. Find out about
this from the relevant provider or on the Internet.
• Manual set-up of the e-mail account
1. Call up function: | E-Mail.
2. Enter e-mail address.
3. Select Manual set-up.
4. Select Private account type (IMAP) (recommended).
5. Enter password.
6. Enter/change server, port and security type.
This information is e-mail account specific and is supplied
by your e-mail account provider. Find out about this from
your account provider or on the Internet.
7. [Next]
8. Enter/change SMTP server, port and security type.
This information is e-mail account specific and is supplied
by your e-mail account provider. Find out about this from
your account provider or on the Internet.
9. [Next]
10. Set account options, such as synchronization interval.

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12 Using the product

11. [Next]
12. Entry of account name (optional) and name which appears
with the sent e-mails.
13. [Next]

 The inbox of the e-mail account is opened.

Call up e-mail account

1
Call up function: | E-Mail

 Inbox menu is opened.

2 Create e-mail: tap .

 Compose menu and the keypad is opened.

3 Enter the e-mail address via the keypad.

4 Fill in subject and create text.

If required, additional files can be attached to the e-mail using the paper
clip symbol.

5 Send e-mail: tap .

 E-mail is sent.

12.2.12 My Apps
Additional applications
1
Call up function: | My Apps

 Available Apps are displayed.

Symbol Name

Alarm clock

Gallery

Browser

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 12 Using the product

Symbol Name

Calendar

Calculator

Quick Support

12.2.13 Help
12.2.13.1 Device registration
1 Call up function: | Help | Device Registration
Testo would like to offer you the best possible customer service. Register your
instrument so that, when you call, our employees in Customer Service have all
the information they need available at all times, so that they can quickly provide
you with further assistance.
Register at: https://testo.com/register
You will find the information you need for registration on the sticker on the back
of the instrument.
Follow the instructions on the display.
Registration gives you the following advantages:
• 1 year's additional warranty for free
• Always being up to date with the latest from Testo

12.2.13.2 Tutorial

1 Call up function: | Help | Tutorial

The tutorial provides you with an overview of and an introduction to the

operation and functions of the instrument.

12.2.13.3 Setup Wizard

1 Call up function: | Help | Setup Wizard

2 The following settings can be made:

Function Section
Country version and language 8.2.6.1
WLAN 8.2.6.2

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12 Using the product

Function Section
Date/time 8.2.6.3
Contact information 8.2.6.4 (own company data)
Registration 8.2.13.1 (instrument registration)

3 Next >

 Setup is complete.

4 If necessary, tap Start tutorial or End setup.

12.2.13.4 Wireless firmware update

Make sure that Enable update for connected instruments under
Help and Information I Instrument information is always activated.

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 12 Using the product

 As soon as a new update is available,

a notification will appear in the display.

1 Tap Start update.

 The update is carried out.

1.1 Tap Later.

 The notification will appear again upon the next connection.

The Bluetooth connection must not be interrupted during the instrument

update. The update must be carried out completely and takes approx. 5
to 10 minutes depending on the smartphone used.

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12 Using the product

 After the update, the measuring

instrument will reboot. The firmware
can be checked in the instrument
menu or via the app. It is
recommended to restart the testo
Smart App after performing the
instrument update.

For wireless firmware updates, a battery power of >10% must be

ensured on the measuring instrument for an update to be carried out
completely.

12.2.13.5 Update via USB

Testo recommends updating the firmware only when the charge
capacity is full.

You will find the current instrument software (firmware) on the Testo homepage
www.testo.com under the product-specific downloads.
1 Call up function: | Help | Update via USB

2 Confirm info with OK.

 Firmware update is started.

3 Insert the connecting cable (0449 0134) into the USB port on the
measuring instrument, then connect it to the PC.

 Your PC identifies the measuring instrument as a removable medium.

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 12 Using the product

4 Copy the new instrument software file (t300.zip) to the identified

removable medium.
Length of the copying process: approx. 10 – 15 minutes

5 Disconnect the connecting cable from the measuring instrument.

Once the instrument software has been updated (duration approx. 1.5
 hrs), the measuring instrument will automatically reboot and is ready for
use again.

57
13 Performing the measurement

13 Performing the measurement

13.1 Prepare for measurement
1 Check the condensate container fill level and if necessary empty
container, see Section 10.5 Empty condensate trap.

2 Check the particle filter of the flue gas probe for contamination and
replace it in good time. If necessary, see Section 10.10 Check/replace
particle filter.

13.2 Zeroing phases

Measuring the combustion air temperature (AT)
If no external combustion air temperature probe or testo 915i Smart Probe is
connected, the combustion air temperature is measured via the integrated
temperature probe.
Gas zeroing
The gas sensors are automatically zeroed after the instrument is switched on.
testo 300 NEXT LEVEL without probe zeroing option in the flue
gas:
The flue gas probe must be in fresh air during the zeroing phase (30
seconds)!
testo 300 NEXT LEVEL with probe zeroing option in the flue gas:
The flue gas probe may already be in the flue gas duct during the
zeroing phase (30 seconds).
> Start zeroing of the gas sensors manually: | Zeroing Gas Sensors
Draught/pressure zeroing
The pressure sensors are zeroed when a pressure measuring function is called
up.
testo 300 NEXT LEVEL without probe zeroing option in the flue
gas:
The flue gas probe must be in fresh air during the zeroing phase! The
instrument must not be pressurized during zeroing!
testo 300 NEXT LEVEL with probe zeroing option in the flue gas:
The flue gas probe may already be in the flue gas duct during the
zeroing phase. The pressure socket of the instrument must be free
(depressurized, not closed).

58
 13 Performing the measurement

13.3 Carry out gas path check

Regularly check the measurement system (measuring instrument + flue
gas probe) for leaks.

In particular, too high an O2 value may be an indicator of a leaking

measurement system.
> | Gas path check.

13.4 Use of flue gas probe

Check thermocouple before use
> The thermocouple of the flue gas
probe must not be touching the probe
cage.
Bend the thermocouple back if
necessary.
Align flue gas probe
> The thermocouple must be freely
exposed to the flue gas flow.
Align the probe by turning it as
required.

Search for corestream

 The tip of the probe is in the corestream of the flue gas.

1 Select Corestream.

2
Start corestream search: tap .

3 Perform zeroing. Please follow the instructions.

59
13 Performing the measurement

4 Align the flue gas probe in the flue

gas duct so that the probe tip is in
the corestream (area of the highest
flue gas temperature Max FT).

 Grey value/grey pointer: Display of current flue gas temperature

Orange value/orange pointer: Display of maximum flue gas temperature

> Reset values/pointer: .

5 End corestream search: tap .

13.5 Overview of measurement types ( )

Measurement types
Flue gas
Draught
BImSchV
CO undiluted
Smoke No.
Differential pressure

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 13 Performing the measurement

Measurement types
Differential temp.
O2 Air
Gas flow
Oil flow
CO ambient
Tightness test 1
Tightness test 2
Let by test
4 Pa measurement

13.5.1 Flue gas

In order to maintain the measuring accuracy of the instrument, the
correct fuel must be selected or configured.
Tap (Fuels)
> Select fuel.

To achieve usable measurement results, the test time of a flue gas

measurement should be at least 3 minutes and the measuring
instrument should display stable readings.

If a separate CO undiluted measurement has not yet been carried out,

this value is calculated using the readings from the flue gas probe and
continuously updated.

For this type of measurement, the Averaging option is also available.

See Averaging section.

Up to four Smart Probes can be used simultaneously during flue gas

measurement. This enables parallel measurement of the combustion air
temperature, the differential temperature and the differential pressure.
The following Smart Probes can be connected:
testo 915i (0563 3915), testo 510i (0560 1510), testo 115i
(0560 2115 02)

1 Call up function: | Flue Gas

61
13 Performing the measurement

2 Start measurement: tap .

 Zeroing takes place.

 Readings are displayed.

If the Draught measurement parameter is enabled in the reading

display, a draught measurement is automatically started in parallel to
the flue gas measurement. In the List measurement data view, the
parallel draught measurement can be stopped/restarted. This draught
measurement is performed separately to a measurement of the
Draught measurement type.

For the draught measurement, the minus connection for differential

pressure measurement must be free (ambient pressure, not closed).

3 Tap on the draught reading display or next to it.

4 End measurement: tap .

Automatic display after connection of one or more Smart Probe testo 115i
or testo 915i during flue gas measurement
If several temperature probes are connected in total (external probes and/or
testo 115i or testo 915i), the temperature probes are used for flue gas
measurement according to the following procedure.
The AT probe = external cable probe always has first priority.

62
 13 Performing the measurement

Connected cable probe Number of connected Smart

Display and use of the
(maximum 1 possible) Probes
temperature probe in testo
(testo 115i and/or testo
300 NEXT LEVEL
915i)
t115i: additional
temperature channel T
No 1
t915i: AT probe for the AT
measurement
Cable probes: AT probe for
Yes -
the AT measurement
Cable probes: AT probe for
the AT measurement
Yes 1
t115i/ t915i: additional
temperature channel T
Internal temperature sensor
t300 NEXT LEVEL: AT
probe for the AT
No 2
measurement
t115i/t915i: additional
temperature channel dT
Cable probes: AT probe for
the AT measurement
Yes 2
t115i/t915i: additional
temperature channel dT
A) min. one t915i connected
t915i: AT probe for the AT
measurement
t115i/t915i: additional
temperature channel dT

No 3 B) no t915i connected
Internal temperature sensor
t300 NEXT LEVEL: AT
probe for the AT
measurement
t115i: additional
temperature channel dT
and temperature channel T
Cable probes: AT probe for
the AT measurement
Yes 3 t115i/t915i: additional
temperature channel dT
and temperature channel T
Internal temperature sensor
t300 NEXT LEVEL: AT
probe for the AT
No 4
measurement
t115i/t915i: 2 additional
temperature channels dT

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13 Performing the measurement

Connected cable probe Number of connected Smart

Display and use of the
(maximum 1 possible) Probes
temperature probe in testo
(testo 115i and/or testo
300 NEXT LEVEL
915i)
Cable probes: AT probe for
the AT measurement
Yes 4
t115i/t915i: 2 additional
temperature channels dT

13.5.2 Draught
For this type of measurement, the Mean value calculation option is
also available. See Mean value calculation section.

 A flue gas probe must be connected.

1 Call up function: | Draught

The minus connection for differential pressure measurements must be

clear (ambient pressure, not closed).

2 Start measurement: tap .

 Zeroing takes place. Please follow the instructions.

 Reading is displayed.

3 End measurement: tap .

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 13 Performing the measurement

13.5.3 CO undiluted
 A multi-hole probe (0554 5762) must be connected.
1 Call up function: | CO undiluted

2 Start measurement: tap .

 Reading is displayed.

3 End measurement: tap .

13.5.4 Smoke number

The Smoke No. and Oil depos. parameters are only available for oil
fuels. The values calculated by a smoke tester can be entered.

Edit values

All values that can be modified have a dotted underlining.

1 Call up function: | Smoke No.

2 Tap required value.

 Keypad appears.

3 Enter value.

4 Confirm entry: tap ✓.

5 Reset readings: tap .

13.5.5 Differential pressure

For this type of measurement, the Averaging option is also available.
See Averaging section.

The differential pressure measurement can also be performed using the

Smart Probe testo 510i (0560 1510).

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13 Performing the measurement

Up to 4 testo 510i Smart Probes can be connected.

WARNING
Dangerous mixture of gases!
Danger of explosion!
- Make sure there are no leaks between the sampling point and the
measuring instrument.
- Do not smoke or use naked flames during the measurement.

 The gas pressure kit (0554 1203) must be connected. Alternatively, the
Smart Probe testo 510i (0560 1510) can be used.

 For an instrument with no dilution option: The minus connection for

differential pressure measurement must be depressurized at the start of
the measurement (ambient pressure, instrument not connected to
system being checked), since the pressure sensor is zeroed.

1 Call up function: | Differential pressure

2 Tap Differential pressure.

3 Start measurement. Tap .

 Zeroing the pressure sensor.

 Reading is displayed.

4 End measurement: tap .

13.5.6 Differential temp.

For this type of measurement, the Averaging option is also available.
See Averaging section.

The measurement can also be carried out using Smart Probes.

The following Smart Probes can be connected:
testo 915i (0563 3915), testo 115i (0560 2115 02)
A differential temperature measurement can also be carried out with
just one Smart Probe testo 915i.
The measuring values (T1 and T2) for determining the differential
temperature can be recorded by pressing the button on the Smart
Probes testo 915i (<1 second).

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 13 Performing the measurement

 Two external temperature probes must be connected. Alternatively,

wireless Smart Probes such as the testo 115i or testo 915i can be
used. However, a maximum of just four Smart Probes can be used at
the same time.

1 Call up function: | Differential temp.

2 Start measurement: tap .

 The measured values and the calculated differential temperature

Δt (T1 - T2) are displayed.

3 End measurement: tap .

Automatic display after connection of several Smart Probe testo 115i or

testo 915i during differential temperature measurement
If several temperature probes are connected in total (external probes and/or
testo 115i or testo 915i), the temperature probes are used for differential
temperature measurement according to the following procedure.
Connected cable probe Number of connected Smart Display and use of the
(maximum 1 possible) Probes temperature probe by
(testo 115i and/or temperature channel
testo 915i)
Temperature channel T1:
No 1 t115i/915i
dT is displayed.
Temperature channel T1:
Cable probe (ext2):
Yes -
T2 and dT are displayed as
"---".
Temperature channel T1:
Cable probe (ext2):
Yes 1 Temperature channel T2:
t115i/915i:
dT is displayed.
Temperature channel T1:
t115i/915i
2
No Temperature channel T2:
t115i/915i:
dT is displayed.

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13 Performing the measurement

Connected cable probe Number of connected Smart Display and use of the
(maximum 1 possible) Probes temperature probe by
(testo 115i and/or temperature channel
testo 915i)
Temperature channel T1:
Cable probe (ext2):
Temperature channel T2:
t115i/915i:
Yes 2 dT is displayed.
Temperature channel T3:
t115i/915i:
T4 and dT are not
displayed.
Temperature channel T1:
t115i/915i
Temperature channel T2:
t115i/915i:
No 3 dT is displayed.
Temperature channel T3:
t115i/915i:
T4 and dT are not
displayed.
Temperature channel T1:
Cable probe (ext2):
Temperature channel T2:
t115i/915i
dT is displayed.
Yes 3
Temperature channel T3:
t115i/915i
Temperature channel T4:
t115i/915i
dT is displayed.
Temperature channel T1:
t115i/915i
Temperature channel T2:
t115i/915i
dT is displayed.
No 4
Temperature channel T3:
t115i/915i
Temperature channel T4:
t115i/915i
dT is displayed.

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 13 Performing the measurement

Connected cable probe Number of connected Smart Display and use of the
(maximum 1 possible) Probes temperature probe by
(testo 115i and/or temperature channel
testo 915i)
Temperature channel T1:
Cable probe (ext2):
Temperature channel T2:
t115i/915i
dT is displayed.
Temperature channel T3:
Yes 4
t115i/915i
Temperature channel T4:
t115i/915i
dT is displayed.
Temperature channel T5:
t115i/915i

13.5.7 O2 supply air

 An O2 dual wall clearance probe (0632 1260) must be connected.
1 Call up function: | O2 supply air

2 Start measurement: tap .

 Reading is displayed.

4 End measurement: tap .

13.5.8 Gas flow

The function is only available if the chosen fuel is a gas.

The gas burner capacity is calculated by means of the gas amount consumed.
To this end, a gas amount is input and its consumption read out at the gas
meter.
1 Call up function: | Gas Flow

2 Set the gas amount to watch for at the gas meter.

3 Set the calorific value of the burnt gas.

4 Start measurement: tap .

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13 Performing the measurement

 The test time is displayed.

5 When the set gas amount is reached: tap .

 The calculated gas flow and the gas burner capacity (in KW) are
displayed.
Edit values

All values that can be modified have a dotted underlining.

13.5.9 Oil flow rate

The function is only available if the chosen fuel is an oil.

This function is used to calculate the capacity of the burner from the set oil
pressure and the oil flow rate of the oil nozzle.
1 Call up function: | Oil flow rate

2 Set oil flow rate of the oil nozzle and oil pressure.

 The calculated oil burner capacity is displayed (in KW).

Edit values

All values that can be modified have a dotted underlining.

13.5.10 CO ambient
• Cigarette smoke influences the measurement by more than 50 ppm.
The breath of a smoker influences the measurement by about 5
ppm.
• When using an ambient CO probe, note that:
The direction of flow of the gas has an effect on the accuracy of
measurement. Frontal flow onto the sensor leads to higher
readings. The best measurement results are achieved when the
probe is moved gently backwards and forwards.
• When using the ambient CO probe and the flue gas probe, note
that:
The probe must be in the fresh air (CO-free) during the zeroing
phase.

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 13 Performing the measurement

For this type of measurement, the Mean value calculation option is

also available. See Mean value calculation section.

 An ambient CO probe (0632 1272) must be connected.

1 Call up function: | CO Ambient

2 Start measurement: tap .

 Reading is displayed.

3 End measurement: tap .

13.5.11 Tightness test 1

The tightness test 1 (using air or inert gas such as CO2 or N2) is a tightness test
for pipes, including fittings, but without gas appliances and the relevant
regulating and safety devices. The tightness test 1 is carried out after a load test
has been successfully completed on newly laid gas pipes, or after renovation of
existing gas pipes, and is used for the acceptance of these pipes. It shows up
even the smallest leaks in gas pipes.
According to DVGW TRGI 2018 and ÖVGW G10, the stabilization time
and test time depend on the pipe volume.
- Pipe volume < 100 l: Adjustment time 10 min, test time 10 min.
- Pipe volume > 100 l to < 200 l: Adjustment time 30 min, test time
20 min.
- Pipe volume > 200 l: Adjustment time 60 min, test time 30 min.

> Connect the connector plug of the hose pressure connection kit
(0554 1203) to the pressure test kit (0554 1213). Insert the pressure
adapter into the flue gas socket and lock by slightly turning it clockwise
(bayonet fitting).

Carrying out the measurement

 The pressure socket of the instrument must be free (depressurized, not

closed).

 Pressure zeroing has been carried out.

1 Call up function: | Tightness test 1.

2 Set parameters or enter values.

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13 Performing the measurement

All values that can be modified have a dotted underlining.

3 Pressurize the system.

Once the pressure has built up, a stabilization time specified by DVGW-
TRGI 2018 should be observed to ensure that any possible pressure
fluctuations are not recorded in the measurement as well. The relevant
standard provides more detailed information.

4 Start stabilization time: tap . If applicable, follow instructions.

 Reading is displayed.

 Stabilization time is finished.

End stabilization time early: tap .

 Measuring time starts.

 The readings are automatically saved and displayed after the

measurement has been completed.

5 The measuring value result can be assessed.

6 Conclude measurement: tap Next.

7 If applicable, repeat measurement: tap .

13.5.12 Serviceability
This measurement is carried out to test the serviceability of an existing gas pipe
system (in contrast to the load test and tightness test 1) and is used to check the
actual condition of the pipes. The pipe system may be in operation or disused.
Adhere to DVGW-TRGI 2018, worksheet G624!
Absolute pressure (parameter of the measuring location) must be
entered to obtain correct readings. If this is not known, it is advisable to
use the value 966 hPa (corresponds to 1013 hPa barometric, 400 m
above sea level).

The testo 300 NEXT LEVEL is not certified according to DVGW G5952;
therefore, no serviceability test according to DVGW-TRGI 2018 may be
carried out with this instrument. We recommend testo 324 for this

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 13 Performing the measurement

measurement, which has been tested and certified in line with DVGW
G5952 by DVGW Karlsruhe and also according to the ÖVGW Guideline
1/2.

> Insert the connector plug of the hose pressure connection kit (0554
1203) into the flue gas socket and lock it in place by turning it slightly
clockwise (bayonet fitting).

Carrying out the measurement

 The pressure socket of the instrument must be free (depressurized, not

closed).

 Pressure zeroing has been carried out.

1 Call up function: | Tightness test 2

2 Set parameters or enter values.

All values that can be modified have a dotted underlining.

Three circle diameters and three pipe lengths can be entered, which
are then used to calculate three partial volumes. The pipe volume is
calculated by adding these three partial volumes.
3 Pressurize the system.

4 Start stabilization time. Tap . If applicable, follow instructions.

 Reading is displayed.

 Stabilization time is finished.

End stabilization time early: tap .

5 End measurement: tap .

 Measuring time starts.

 The readings are automatically saved and displayed after the

measurement has been completed.

6 The measuring value result can be assessed.

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13 Performing the measurement

7 Conclude measurement: Tap Next.

8 If applicable, repeat measurement: tap .

13.5.13 Let by test

> Insert the connector plug of the hose connection kit (0554 1203) into
the flue gas socket and lock it in place by turning it slightly clockwise
(bayonet fitting).

Carrying out the measurement

 The pressure socket of the instrument must be free (depressurized, not

closed).

 Pressure zeroing has been carried out.

1 Call up function: | Let By Test.

2 Set parameters or enter values.

All values that can be modified have a dotted underlining.

3 Start stabilization time: tap . If applicable, follow instructions.

 Reading is displayed.

 Stabilization time is finished.

End stabilization time early: tap .

 Measuring time starts.

 The readings are automatically saved and displayed after the

measurement has been completed.

4 The measuring value result can be assessed.

5 Conclude measurement: tap Next.

6 If applicable, repeat measurement: tap .

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 13 Performing the measurement

13.5.14 4 Pa measurement
The 4 Pa measurement is only available with instruments that have the
dilution option available.

1 Call up function: | 4 Pa measurement

2 Set parameters or enter values.

All values that can be modified have a dotted underlining.

3 Connect adapter 0554 1203, hose connection kit and capillary hoses
0554 1215 as shown in the illustration.

4 Tap Next.

 Hose test is started.

5 Tap Next.

 Measurement starts.

 Readings and measuring time are displayed.

Follow the notes in the display.

 The readings are automatically saved and displayed after the

measurement has been completed.

6 End measurement early: tap .

Guidelines for the qualification test for differential pressure measuring

instruments for the measurement of underpressures in rooms where firing
installations are set up
These guidelines were created by the ZIV (Guild of Master Chimney Sweeps) in
collaboration with differential pressure measuring instrument manufacturers, the
TÜV SÜD Industrie Service GmbH test centre, firing and heat technology, and
the DVGW (German Technical and Scientific Association for Gas and Water).
Areas of application and purpose:
Firing installations which are dependent on indoor air must not be set up in
rooms with air extraction equipment. However, insofar as no dangerous
underpressure can arise while the firing installations are in operation,

75
13 Performing the measurement

derogations are possible. An underpressure of more than 4 Pa should be

regarded as dangerous when operating firing installations which are dependent
on indoor air. When operating tested firing installations which are not dependent
on indoor air for solid fuels, as a rule an underpressure of more than 8 Pa is not
permissible (see proof of usability e.g. general building approval for the firing
installation). These test guidelines apply to differential pressure measuring
instruments for determining the underpressure in rooms where firing installations
are set up and is aimed at the manufacturers of these kinds of measuring
instruments. They set out requirements for construction and minimum
requirements for the performance characteristics of relevant measurement and
inspection equipment in the area of underpressure measurement, along with
specifications for carrying out qualification tests.
Description of typical measuring principles:
With an instrument that has been tested according to these guidelines, it is
possible to check an underpressure limit value of 4 Pa, or of 8 Pa for firing
installations which are not dependent on indoor air, in the equipment room, and
to show the time progression over a period of at least 3 minutes in a diagram on
the display, or to print it out, and evaluate it. Two flexible capillary hoses of the
same length enable the differential pressure between the equipment room and a
reference point that is pneumatically disconnected from the combustion air
network (outside air, stairwell) to be recorded and conveyed to a pressure
sensor.
The capillaries can be routed both outside through the window sealing and to
the stairwell through the door rebate or the keyhole. The second capillary hose
remains in full in the equipment room.
Procedure for an underpressure measurement in equipment rooms:
Firing installations which are dependent on indoor air must not be set up in
rooms with air extraction equipment. However, insofar as no dangerous
underpressure can arise while the firing installations are in operation,
derogations are possible. An underpressure of more than 4 Pa should be
regarded as dangerous when operating firing installations which are dependent
on indoor air. When operating tested firing installations which are not dependent
on indoor air for solid fuels, as a rule an underpressure of more than 8 Pa is not
permissible (see proof of usability e.g. general building approval for the firing
installation).
The proof can be provided through different measures. These for instance
include the installation of a window tilt switch, the installation of an
underpressure monitor or proof by means of measuring technology that with
simultaneous operation of the fire installation(s) and indoor air extraction
system(s), no dangerous underpressure can arise.
The question as to which measure may give the desired result essentially
depends on the local conditions. These are for instance the leaktightness of the
building shell, the size of the usage unit, the presence or leaktightness of the
communicating doors and the quantity of air which is extracted from the usage
unit by the indoor air extraction systems.

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 13 Performing the measurement

It can be assumed that, with effective fume hood systems, at least 400 m3/h of
air are extracted (with exhaust air driers the quantity of air is not significantly
below this, very powerful fume hood systems extract over 1000 m3/h of air).
With very high air extraction performances, an underpressure measurement is
frequently not expedient in apartments or comparable usage units.
As a rule, the solution here can simply be an opening to the outside, so for
example a tilted window with a window tilt switch. In a case of this kind, the
measurement only makes sense if the owner/operator of the firing installation is
absolutely intent on having the proof of the underpressure being too high.
The area of application of underpressure measurement in equipment rooms is
therefore primarily where the power of the indoor air extraction systems is
estimated to be low or there are particular physical conditions which suggest
that the underpressure does not exceed the permissible value (4 or 8 Pa) when
the firing installation(s) and indoor air extraction system(s) are operated
together.
The check that no dangerous underpressure can arise should be carried out
using pressure measuring instruments that have undergone qualification testing
for the "measurement of underpressures in rooms where firing installations are
set up".
The measurement is carried out according to the following process outline:
1. Close all the usage unit's windows and doors. If there are blinds present on
the windows and external doors, these should also be closed. Switch
differential pressure measuring instrument on and wait for the zero point to
be determined, connect capillary hoses to the measuring instrument
(reference = (-) connection, equipment room = (+) connection), open
windows, and if applicable blinds, and lay external capillary hose (for
reference pressure), check zero point on the reading display, start pressure
progression recording, wait approx. 30 seconds with open window or
external door to register zero line.
2. Start up firing installation(s) and set to maximum power. For manually loaded
firing installations for solid fuels, full load operation must be achieved. All
available air extraction equipment should be started up. The process must
involve the measurement recording the most unfavourable condition, that is
the evaluation should be carried out with the air extraction system(s) at the
highest level of power. In cases where the ventilation equipment is not
located in the same room as the firing installation, all doors and openings
between the room where the firing installation is set up and the ventilation
equipment are to be kept open. The zero point should not change after
starting up the firing installation and air extraction equipment with the
window or external door of the equipment room open.
3. Close door/window, wait approx. 30 seconds, check underpressure, check
clean extraction of the flue gases. If a blind is present on the
window/external door of the equipment room, this should be closed and
opened at the same time in each case.

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13 Performing the measurement

4. Open door/window, wait approx. 30 seconds, zero line must be reached

again.
5. Close door/window, wait approx. 30 seconds, check underpressure, check
clean extraction of the flue gases.
6. Open door/window, wait approx. 30 seconds, zero line must be reached
again.
7. Close door/window, wait approx. 30 seconds, check underpressure, check
clean extraction of the flue gases.
After the measurement, the result can be printed out and evaluated. If the
underpressure in the room where the firing installation(s) is/are set up is
constantly below 4 Pa, or with tested firing installations for solid fuels that are
not dependent on indoor air below the maximum permissible underpressure
specified in the proof of usability (currently 8 Pa in principle), then the safe
simultaneous operation of the firing installation and air extraction system(s) is
possible.
Careful execution of the measurement in accordance with the steps listed above
enables a correct evaluation and rating of the safe operation of the firing
installation(s) and indoor air extraction system(s).
The measurement result represents the evaluation of the current status, taking
into account the devices available for the test and influencing the result
(combustion plants and air extraction system(s)) and the condition of the
building (e.g. windows and doors). A new evaluation is required when there is a
change to the firing installation, to any other devices that have an influence or to
the building.
Repeat checks:
Flawless operation of the instrument, the fine pressure probe and the capillary
hoses must be determined by regular checks once every six months at a
technical test centre of the Guild of Master Chimney Sweeps.

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 13 Performing the measurement

13.6 Overview of options ( )

Options Description
Edit measurem. view Add (add), delete ( ) measurement
parameters,
change display sequences ( ) and units (click
on (Unit).
Zeroing Gas Sensors Manually zeroing gas sensors.
Menu is only available for measurements
with gas sensors.
Zeroing Smart Probes Zero the differential pressure Smart Probe.
The menu is only available for
measurements with the Smart Probe testo
510i.
Averaging | On Calculation of a mean value within a preset
time.

13.6.1 Edit view

1
Call up function: | Options | Edit View

 Edit View menu is opened.

2 Measurement parameter

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13 Performing the measurement

- Add: tap Add to open selection list of measurement parameters.

- Delete: tap on .
- Edit unit: tap on the measurement parameter you want to edit. Tap
on the required measurement unit in the selection list that has been
opened.
- Change position in the list: Press and hold and drag to the
required position.
- Accept changes: tap Confirm.
Selection list (example: Country version Germany)
The overview of measurement parameters (available selection depends on the
chosen measurement type, fuel set and the sensors available in the measuring
instrument):

Display Measurement parameter

FT Flue gas temperature

AT Combustion air temperature

Itemp Instrument temperature

Pump Pump performance

O2 Oxygen

CO2 Carbon dioxide

qAnet Flue gas loss without consideration of the calorific value range

Effn Efficiency without consideration of the heat value range

qAgr. Flue gas loss with consideration of the calorific value range

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 13 Performing the measurement

Display Measurement parameter

Effg Efficiency with consideration of the calorific value range

Draught Flue draught

ΔP Differential pressure

CO Carbon monoxide

uCO Undiluted carbon monoxide

NO Nitrogen monoxide

NOx Nitrogen oxides

λ Fuel-air ratio

AmbCO Ambient carbon monoxide

O2ref Oxygen reference

ΔT Differential temperature

Dew Pt Flue gas dewpoint temperature

Smoke 1

Smoke 2

Smoke 3

Smokenum
ber Ø

Only those measurement parameters and units that are enabled in the
reading display appear in the reading display, in the saved
measurement protocols and on the report printouts.

The settings only apply to the measurement type currently enabled.

13.6.2 Zeroing Gas Sensors

Zeroing of the gas sensors can be started manually.
> | Zeroing Gas Sensors

 The gas sensors are zeroed.

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13 Performing the measurement

testo 300 NEXT LEVEL without probe zeroing option in the flue
gas:
The flue gas probe must be in fresh air during the zeroing phase (30
seconds)!
testo 300 NEXT LEVEL with probe zeroing option in the flue gas:
The flue gas probe may already be in the flue gas duct during the
zeroing phase (30 seconds).

13.6.3 Mean value calculation

The mean value calculation option is only available in the country
versions x, y, z...

The mean value calculation option can only be set for the following
measurement types: Flue gas, Draught, Differential pressure,
Differential temperature and CO Ambient.

1 Select required measurement type.

2
Call up function: | Options | Mean value calculation | On

 The list for mean value calculation is opened.

 The start button changes to .

3 Determine the measuring rate (1 sec - 120 sec). The required value can
be entered directly in the field on the first two lines of the display.

4 Confirm with .

5 Determine the measuring time (30 sec - 90 min). The required value
can be entered in the field.

6 Confirm with .

7 Start mean value calculation with .

• Stabilization time begins. It can be terminated manually by selecting

 Next.
• After a maximum of 3 minutes, the stabilization time ends and the
measurement starts automatically.
• The system records the readings in the set measuring cycle.

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 13 Performing the measurement

• During the measurement, the readings and the calculated values

are displayed.
• End measurement early: .
• Readings are automatically saved.
• The measurement result is displayed.

8 Carry out another measurement: .

13.7 Overview of protocols ( )

Protocols Feature
Print values Print out measuring values via Bluetooth®.

Save Save measuring values, including selected

customers/measuring sites. Saved measuring
values can be retrieved in the main menu.
Finish protocol Create, save and send measurement report,
including
- Own company data
- Format and print
- Customer data
- Comments and pictures
- Select measurements
- Signature
Saved reports can be retrieved in the main menu.

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13 Performing the measurement

Protocols Feature
Share Transfer to external software
- via QR Code
- share TJF file

13.7.1 Print data

The current readings are printed via a Bluetooth® printer (accessories: Testo
printer 0554 0621).
Carry out print text settings
Print text settings can be carried out and the reading printout can be
supplemented with individual creator information (header: company address;
footer: name of technician), see Section 8.2.5.4 Own company address.
Print current readings

 The printer is switched on and within wireless range.

1 tap .

 Protocols menu is opened.

2 Tap Print values.

 The protocol is created and sent to the printer.

 The protocol is printed.

Bluetooth® is always activated on the testo 300 NEXT LEVEL.

13.7.2 Save
The measurement data from the last measurement carried out of each
measurement type is saved on the measuring instrument.
Measurements that have been carried out can be saved to back up the
measurement data and for the subsequent creation of a report:
1 tap .

 Protocols menu is opened.

2 Tap Save.

 The measurement protocol is saved.

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 13 Performing the measurement

Only saved readings can be further processed at a later stage for a

report.

The readings are automatically saved for the following measurement

types:
• Tightness test 1
• Tightness test 2
• Let by test
• 4 Pa measurement (DE country version)
• First German Federal Immission Control Ordinance (BImSchV) (DE
country version)
• Averaging (IT country version)

13.7.3 Finish protocol

1 tap .

 Protocols menu is opened.

2 Tap Finish protocol.

 Options for Protocols are opened.

3 Enter/select log data:

Category Description
Format and print Select output format(s):
- CSV (comma separated text file,
e.g. for Microsoft® Excel),
- PDF
- QR (global interface for third party
software)
- QR_ZIV (interface complying with
the regulations of the ‘Federal
Association of the Chimney
Sweeps in Germany’)
- ZIV (XML file, complying with the
regulations of the Federal
Association of Chimney Sweeps in
Germany).
Customer data Enter contact details
Comments and pictures Enter comments and add pictures.

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13 Performing the measurement

Select measurements All saved measurements are displayed

in one of the following time categories,
depending on the creation date:
Today, Yesterday or Older.
The measurements selected to create
the report are identified with .
Recently saved measurements for
these customers are automatically
identified.
To display saved readings to check
them:
 .
To delete individual measurement:
 .
To delete all measurements of a time
category:
 tap next to the time category
name.
To select/deselect a measurement for
the report:
 .
Signature Tap Sign Report and sign.
Options:
Abort, Reset and Save

4
Print values: tap .

To save readings: tap .

Save and send report: tap .

Generate QR code: tap .

86
 14 Maintenance

14 Maintenance
Fr d

14.1 Service
Testo recommends an annual check of the testo 300 NEXT LEVEL; this
can be carried out by a Testo-authorised service centre. Please contact
Testo at http://www.testo.com for more information.
Fr d

14.2 Calibration
The measuring instrument is supplied with a calibration protocol as
standard. To maintain the specified accuracy of measurement results,
Testo recommends an annual check of the testo 300 NEXT LEVEL by a
Testo-authorised service centre.
Please contact Testo at http://www.testo.com for more information.

14.3 Check instrument status

14.3.1 Sensor diagnosis
The status of the sensors can be displayed.
To replace expended sensors, see Section "Replace sensors".
Call up function: | Sensor Diagnosis

 Sensor diagnosis is displayed.

A sensor is able to recover. It is therefore possible for the sensor status

display to change from not OK to OK.

14.3.2 Error list

Instrument errors that have not yet been rectified can be displayed.
Call up function: | Error list

 Error list is displayed if there are errors present.

14.4 Clean the measuring instrument

> If the housing of the measuring instrument is dirty, clean it with a damp
cloth.

Use distilled water or a weak solvent to clean the flue gas analyzer.

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14 Maintenance

IMPORTANT
Leaking solvents and degreasers!
Damage to the instrument and sensors!
- Do not store solvents and degreasers, such as isopropanol, in the case.

IMPORTANT
Strong or harsh alcohol or brake cleaner!
Damage to the instrument!
- Do not use any strong or harsh alcohol or brake cleaner.

14.5 Drain condensate container

The fill level of the condensate container can be read from the markings. Hold
the instrument horizontally or vertically to check the fill level.

CAUTION
Weak mix of acids in the condensate!
Minor injuries!
- Avoid skin contact.
- Make sure that the condensate does not run over the housing.

CAUTION
Condensate entering the gas path!
Damage to sensors and flue gas pump!
- Do not empty condensate container while the flue gas pump is in
operation.

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 14 Maintenance

1 Open the condensate outlet on the

condensate container.

2 Let the condensate run out into a

sink

3 - Wipe off any drops still on the condensate outlet with a cloth and close
the condensate outlet.

The condensate outlet must be completely closed, otherwise incorrect

measurements could occur due to infiltration of external air.

14.6 Open the measuring instrument

Only open the measuring instrument when this is required for maintenance
purposes (replacing gas sensors).

 The measuring instrument must not be connected to a mains socket via

the mains unit. The measuring instrument must be switched off.

When opening/assembling the instrument, take care not to lose any

screws that have been removed. It is advisable to place a cloth on the
work surface.

1 Place the instrument on its front so that the back is facing upwards.

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14 Maintenance

2 Using a torx screwdriver (size T 10),

remove both housing screws on the
top of the instrument.

ATTENTION
The instrument may be damaged by incorrect removal of the housing
screws!
- Only remove the two housing screws on the top of the instrument. The
other four screws must be left as they are.

3 Unlock the operating module in the

direction of the arrow.

4 Remove the operating module.

5 Place the instrument on its front again.

6 Remove the remaining four screws on the back of the instrument.

7 Lift off the back of the instrument.

Assembly
Perform in reverse order to assemble. Please note:
- Lay hoses and lines in the guides intended for this purpose.
- Make sure that hoses and lines do not get jammed.

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 14 Maintenance

14.7 Replace sensors

A slot bridge (0192 1552) must be inserted in slots which are not
equipped with a sensor. Used sensors must be disposed of as
hazardous waste!
Available slots:

1 CO sensor or COlow sensor 3 O2 sensor

2 NO sensor or NOlow sensor

When retrofitting a sensor, the associated measurement parameter/unit

must be enabled in the reading display.

14.7.1 Replace O2 sensor

 Measuring instrument is open, see Section Open measuring
instrument.

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14 Maintenance

1 Unlock retaining bracket and open

out.

2 Remove faulty sensor from the slot.

3 Insert new sensor in the slot.

Make sure that the socket on the
sensor circuit board is correctly
connected to the contact plug.

4 Close the retaining bracket with an audible "click".

5 Close the measuring instrument.

After replacing an O2 sensor, wait for an acclimatization time of 15 min

to elapse before using the instrument.

When replacing an O2 sensor and when there is an interruption of the

power supply for more than 10 hours, we recommend an
acclimatization time of 1 hour for compliance with measuring accuracy.

14.7.2 Change CO, CO H2 and NO sensor

 Measuring instrument is open, see Section Open measuring
instrument.

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 14 Maintenance

1 Remove faulty sensor and hose

connections from the slot.

2 Remove hose connections from the

faulty sensor/bridge.

For NO sensor: Remove auxiliary circuit board.

Do not remove the auxiliary circuit board of the NO sensor until
immediately before installation. Do not leave the sensor without
auxiliary circuit board for longer than 15 minutes.

3 Fit the hose connections onto the new sensor.

4 Fit new sensor into the slot and at the same time fit the hose
connections onto the gas path connections.
Make sure that the socket on the sensor circuit board is
correctly connected to the contact plug.

5 Close the measuring instrument.

14.8 Clean modular flue gas probe

 Disconnect flue gas probe from the measuring instrument.
1 Release probe catch by pressing the key on the probe handle and
remove probe module.

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14 Maintenance

2 Blow compressed air through flue gas

ducts of the probe module and probe
handle (see illustration). Do not use a
brush!

3 Fit probe module onto the probe handle and click into place.

14.9 Replace the probe module

 Disconnect the flue gas probe from the measuring instrument.
1 Press the key on the top of the probe
handle and remove the probe module.

2 Fit new probe module and click into place.

14.10 Check/replace particle filter

Check particle filter
• Particle filters of the modular flue gas probe must be checked regularly for
contamination: check visually by looking through the window of the filter
chamber.
• If there is visible contamination or inadequate pump flow, replace the filter.
Replace particle filter

The filter chamber may contain condensate. This is not a malfunction

and will not cause incorrect readings.

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 14 Maintenance

1 Open filter chamber: turn slightly

anti-clockwise.

2 Remove filter chamber.

3 Remove filter plate and replace it

with a new one (0554 3385).

4 Attach the filter chamber and lock it:

turn slightly clockwise.

14.11 Replace thermocouple

1 Release probe catch by pressing the key on the probe handle and
remove probe module.

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14 Maintenance

2 Remove thermocouple plug-in head

from the socket using a screwdriver
and pull thermocouple out of the probe
shaft.

3 Insert new thermocouple into the probe shaft until the plug-in head
clicks into place.

4 Fit probe module onto the probe handle and click into place.

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 15 Technical data

15 Technical data
Technical data for testo 300 NEXT LEVEL
Feature Value
Temperature measuring instrument -40 to +1200 °C
Draught measurement -9.99 to +40 hPa
Pressure measurement -100 to 200 hPa
O2 measurement 0 to 21 vol.%
CO measurement 0 to 4,000 ppm
Option: CO measurement 0 to 8,000 ppm
(H2-compensated)
Option: CO measurement 0 to 500 ppm
(H2-compensated: COlow sensor)
Option: CO measurement with activated 0 to 15,000 ppm
fresh air dilution/measuring range
extension
Option: CO measurement 0 to 30,000 ppm
(H2-compensated) with activated fresh
air dilution/measuring range extension
1st BimSchV, measurement 20,000
ppm
Option: NO measurement 0 to 3,000 ppm
Option: NO Measurement with NOlow 0 to 300 ppm
sensor
Efficiency testing (Eta) 0 to 120%
Flue gas losses 0 to 99.9%
CO2 determination (calculation from O2) Display range 0 to CO2 max.
Ambient CO measurement (internal/flue 0 to 2,000 ppm
gas probe)
Ambient CO measurement (external with 0 to 500 ppm
CO probe)
Service life O2 sensor Up to 72 months depending on load
Service life CO sensor Up to 72 months depending on load
Service life NO sensor Up to 72 months depending on load
Service life COlow sensor Up to 72 months depending on load
Service life NOlow sensor Up to 72 months depending on load
General technical data

Feature Value
Storage temperature -20 to +50°C
Operating temperature -5 to +45°C
Charging temperature -0 to +45°C

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15 Technical data

Feature Value
Energy storage unit 3.6 V/3.5 Ah
Mains unit 5V/1A
Humidity application range 15 to 90% RH, non-condensing
Power supply Energy storage unit, USB mains
unit
Energy storage unit service life 10 hrs
Lifetime energy storage > 1000 charging cycles / approx. 5
years
Protection class IP 40
Memory 1 million measuring values
Display 5.0" touch display,
HD 1280x720 pixels
Weight Approx. 800 g
Dimensions L: 244 mm (including probe
connection)
H: 59 mm
W: 98 mm.
Certification TÜV-tested according to 1st German
Federal Immission Control Ordinance
(BImSchV) EN 50379, Parts 1-3
Technical data for testo 915i

Feature Value
Battery type 3 x micro batteries AAA
Battery life 150 h at +25 °C and measurement cycle 1 s
Data transmission Bluetooth®
Wireless range Up to 100 m with no obstructions
Operating temperature -20 to +50 °C
Storage temperature -20 to +60 °C
Protection class IP 40
Measuring range -50 to +400 °C
Accuracy ±1.0 °C
Solution 0.1 °C
Dimensions Handle: 129 x 31 x 31 mm
Probe: length 99 mm/diameter 4 mm
Power indicator 3-colour LED (orange/red/green)
Measurement/connection 1s
cycle
Auto Off After 10 minutes without Bluetooth® connection

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 15 Technical data

Technical data for testo 510i

Feature Value
Battery type 3 x micro batteries AAA
Battery life 150 h at +25 °C and measurement cycle 2 s
Data transmission Bluetooth®
Wireless range Up to 100 m with no obstructions
Operating temperature -20 to +50 °C
Storage temperature -20 to +60 °C
Measuring range -150 to +150 hPa
Accuracy ±0.05 hPa (0 to +1 hPa)
±0.2 hPa + 1.5% of m.v. (+1 to +150 hPa)
Solution 0.01 hPa
Dimensions 148 x 36 x 23 mm
Function indicator 3-colour LED (orange/red/green)
Measurement/connection 2s
cycle
Auto Off After 10 minutes without Bluetooth® connection
Technical data for testo 115i

Feature Value
Battery type 3 x micro batteries AAA
Battery life 150 h at +25 °C and measurement cycle 1 s
Data transmission Bluetooth®
Wireless range Up to 100 m with no obstructions
Operating temperature -20 to +50 °C
Storage temperature -20 to +60 °C
Measuring range -40 to +150 °C
Accuracy ±1.3 °C
Solution 0.1 °C
Dimensions 183 mm x 90 mm x 30 mm
Power indicator 3-colour LED (orange/red/green)
Measurement/connection 1s
cycle
Auto Off After 10 minutes without Bluetooth® connection
Technical data for Bluetooth® Connector

Feature Value
Storage temperature -5 to +45 °C
Operating temperature -5 to +45 °C
Humidity application range 15 to 90 %RH, non-condensing

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16 Contact and support

Feature Value
Operating altitude <= 2,000 m
Level of contamination PD 2
Mains unit 5 VDC/ 6 mA
Voltage tolerance ±10%
Protection class IP 40
Weight Approx. 6.5 g
Dimensions L: 23 mm
H: 27 mm
W: 18 mm

16 Contact and support

If you have any questions or need further information, please contact your
dealer or Testo Customer Service. For contact details, please visit
www.testo.com/service-contact.

100
Testo SE & Co. KGaA
Celsiusstr. 1
D-79822 Titisee-Neustadt
Germany
Phone: +49 7653 681-0
E-mail: info@testo.de
www.testo.com

0970 3010 en 09 - 04.2023