testo 300 / testo 300 LL NEXT LEVEL – flue gas analyzer
0633 3002 / 0633 3004

Instruction manual

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Contents

Contents
1
About this document ...........................................................................5
1.1
Symbols .................................................................................................5
1.2
Warning notices......................................................................................52
General safety instructions .................................................................63
Product-specific safety instructions ..................................................84
Disposal ................................................................................................95
Products with wireless technology ..................................................10
6
Storage ................................................................................................ 10
7
Authorisations and certification .......................................................10
8
EU declaration of conformity ............................................................ 10
9Specifications .....................................................................................11
10
Product description ...........................................................................13
10.1
Front view............................................................................................. 13
10.2
Rear view ............................................................................................. 14
10.3
Connections ......................................................................................... 15
11
Compact flue gas probe ....................................................................15
11.1
Modular flue gas probe .........................................................................16
12
First steps ........................................................................................... 17
12.1
Commissioning .....................................................................................17
12.2
Mains unit/energy storage unit ............................................................. 1712.2.1.1 Charge energy storage unit ..................................................................1712.2.1.2 Mains operation ....................................................................................18
12.3
Touchscreen operating concept ........................................................... 18
12.4
Keypad .................................................................................................19
12.5
Switching the instrument on and off .....................................................20
12.6
Connect probes ....................................................................................21
12.7
Connecting Smart Probes and testo Smart App ...................................2212.7.1 Attaching the testo Bluetooth® Connector (0554 3004) ........................ 2212.7.2 Smart Probes compatible with the instrument ......................................24
12.7.3 Establishing a connection with the testo Smart App ............................. 24
12.7.3.1 App user interface ................................................................................25
12.7.3.2 Measurement menu – testo 300 Second Screeen ............................... 25
12.7.4 Connecting for the first time .................................................................26
12.7.5 Carrying out the measurement ............................................................. 27
12.7.6 Settings – language..............................................................................27
12.7.7 Help and Information ............................................................................28
12.7.7.1 Instrument information..........................................................................28
12.7.7.2 Tutorial .................................................................................................28

Contents
12.7.7.3 Exclusion of liability .............................................................................. 28
13
Using the product .............................................................................. 29
13.1
User interface ...................................................................................... 29
13.1.1 List reading display type ...................................................................... 30
13.1.2 Graphics reading display type.............................................................. 31
13.1.3 Corestream reading display type ......................................................... 32
13.2
Overview of main menu () ............................................................ 33
13.2.1.1 Customer / Measuring site ................................................................... 35
13.2.2 Protocols .............................................................................................. 37
13.2.3 Saved reports ...................................................................................... 39
13.2.4 Second Screen .................................................................................... 41
13.2.5 Gas path check .................................................................................... 41
13.2.6 Device settings .................................................................................... 41
13.2.6.1 Country version and language ............................................................. 41
13.2.6.2 Wireless LAN ....................................................................................... 43
13.2.6.3 Date/Time ............................................................................................ 44
13.2.6.4 Own company address ........................................................................ 46
13.2.6.5 Hotspot ................................................................................................ 46
13.2.6.6 Rechargeable battery management..................................................... 47
13.2.6.7 Display brightness ............................................................................... 47
13.2.6.8 Manage e-mail accounts ...................................................................... 47
13.2.6.9 CO/NO sensor protect ......................................................................... 48
13.2.6.10
NO2 addition ............................................................................... 48
13.2.6.11
O2 reference ................................................................................ 48
13.2.6.12
Alarm limits .................................................................................. 49
13.2.7 Sensor diagnosis ................................................................................. 49
13.2.8 Error list ............................................................................................... 49
13.2.9 Device information ............................................................................... 49
13.2.10 Server information ............................................................................... 49
13.2.11 E-mail .................................................................................................. 50
13.2.12 My Apps ............................................................................................... 52
13.2.13 Help ..................................................................................................... 53
13.2.13.1
Device registration ....................................................................... 53
13.2.13.2
Tutorial ........................................................................................ 53
13.2.13.3
Setup Wizard ............................................................................... 53
13.2.13.4
Wireless firmware update ............................................................ 54
13.2.13.5
Update via USB ........................................................................... 56

Contents
1414.1
14.1.114.1.214.1.3

Performing the measurement............................................................ 57
Prepare for measurement ....................................................................57
Zeroing phases.....................................................................................57
Carry out gas path check .....................................................................58
Use of flue gas probe ...........................................................................58

14.2
Overview of measurement types () .............................................60
14.2.1 Flue gas ............................................................................................... 61
14.2.2 Draught ................................................................................................ 64
14.2.3 1st BImSchV ........................................................................................ 65
14.2.4 44th BImSchV ......................................................................................67
14.2.5 Solid fuel measurement........................................................................70
14.2.6 CO undiluted ........................................................................................ 71
14.2.7 Smoke number .....................................................................................71
14.2.8 Differential pressure .............................................................................72
14.2.9 Differential temp. ..................................................................................73
14.2.10 O2 supply air ......................................................................................... 75
14.2.11 Gas flow ............................................................................................... 75
14.2.12 Oil flow rate .......................................................................................... 76
14.2.13 CO ambient .......................................................................................... 76
14.2.14 Tightness test 1 ....................................................................................77
14.2.15 Serviceability ........................................................................................ 78
14.2.16 Let by test ............................................................................................. 80
14.2.17 4 Pa measurement ...............................................................................81
14.3
Overview of options () .................................................................85
14.3.1.1 Edit view ............................................................................................... 86
14.3.2 Zeroing Gas Sensors ...........................................................................88
14.3.3 Mean value calculation .........................................................................88
14.4
14.4.114.4.214.4.3
15
15.1
15.2
15.3
15.3.1

Overview of protocols () ............................................................... 90
Print data .............................................................................................. 91
Save .....................................................................................................91
Finish protocol ......................................................................................92
Maintenance........................................................................................ 94
Service .................................................................................................94
Calibration ............................................................................................ 94
Check instrument status .......................................................................94
Sensor diagnosis ..................................................................................94

Contents
15.3.2
15.4
15.5
15.6
15.7
15.8
15.8.1
15.9
15.10
15.11
15.12
16
16.1

Error list ............................................................................................... 94
Clean the measuring instrument .......................................................... 95
Drain condensate container ................................................................. 95
Open the measuring instrument........................................................... 97
Replace sensors .................................................................................. 98
Replace O2 sensor .............................................................................. 99
Change CO, CO H2 and NO sensor .................................................. 100
Clean modular flue gas probe ............................................................ 101
Replace the probe module ................................................................. 102
Check/replace particle filter ............................................................... 102
Replace thermocouple ....................................................................... 103
Technical data .................................................................................. 104
Contact and support .......................................................................... 107

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 orderto prevent injury and damage to the product.

1.1

Symbols

Display

Explanation
Note: basic or further information

1
2
…

✓

1.2

Action: several steps, the sequence must be followed.

Result of an action
Requirement

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.
ATTENTION
Indicates possible damage to equipment.

5

2 General safety instructions

2 General safety instructions•

Only operate the product properly, for its intended purpose, and within theparameters 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 andmoisture.

•

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 whencarrying 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 whenusing Testo products with magnetsoHandle instruments or accessories containing a magnet with care andkeep 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 themeasuring range of the sensor technology. Do not expose handles andsupply lines to temperatures above 45°C (113°F), unless they are explicitly
approved for higher temperatures.

6

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 waterand 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 producthas 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 takenout of service and secured against inadvertent use. This is the case if the
product:o
is obviously damagedohas fractures on the housingohas faulty measuring cablesohas leaking batteriesono longer performs the required measurementsohas been stored for too long in unfavourable conditionsohas been exposed to mechanical stresses in transit

7

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 themeasuring 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 thecondensate.

•

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 andthe 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.

8

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
Powder 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 ofwater (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

9

5 Products with wireless technology

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:•

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 productauthorization.
The use of the wireless module is subject to the regulations andstipulations 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 theseregulations and prerequisites for use and acknowledges that the resale, export, import, etc., in particular in, to or from countries without
wireless authorization, is their responsibility.

8 EU declaration of conformity
Testo SE & Co. KGaA hereby declares that the testo 300 / testo 300 LL (0633
3002 / 0633 3004) comply with Directive 2014/53/EU.
The full text of the EU Declaration of Conformity can be found on the following
website: https://www.testo.com/eu-conformity.

10

9 Specifications

9 Specifications
The testo 300 NEXT LEVEL is a measuring instrument which enables theprofessional 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 forcompliance with the applicable limit values.
The instrument has been verified as a short-term measuring instrument andshould 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 toensure 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 accordancewith 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 usedfilter.
The testo 300 NEXT LEVEL is a measuring instrument which enables theprofessional flue gas analysis of combustion systems, such as•

small combustion plants (oil, gas, wood, coal)
The solid fuel measurement adapter (0600 9765) is required formeasurements on solid fuel systems. The adapter protects themeasuring instrument from harmful substances (dust, organic
compounds, etc.).

•

low-temperature and condensing boilers•.

gas heaters.

11

9 Specifications
Using the instrument, these systems can be adjusted and checked forcompliance with the applicable limit values.
The instrument has been verified as a short-term measuring instrument andshould not be used as a safety (alarm) device.
The following tasks can also be carried out using the instrument:•

Regulating the O2, CO and CO2, NO, NOx values in combustion plants toensure 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 accordancewith 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 usedfilter.

12

10 Product description

10 Product description
10.1 Front view

1 USB interface/mains connection
2 Gas outlet
3 On/Off button

4 User interface
5 Condensate container
6 Connections

13

10 Product description

10.2 Rear view

1 Attachment point for carrying
strap

2 Magnets

Explanation of icons
IMPORTANT
Magnetic field
Damage to other devices!
- Keep a safe distance away from products that could bedamaged 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
China RoHS

14

11 Compact flue gas probe10.3 Connections

1 Probe connections for additional
probes and testo Bluetooth®
Connector
2 Integrated ambient air probe

3 Flue gas socket

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.

11 Compact flue gas probe

1 Removable filter chamber withwindow and particle filter
2 Probe handle

3 Connector plug for measuring
instrument
4 Connection cable15

11 Compact flue gas probe

11.1 Modular flue gas probe

Removable filter chamber withwindow and particle filter
2 Lock release

Connector plug for measuring
instrument
5 Probe handle

1

4

3 Probe module

6 Connection cable

Removable filter chamber withwindow and particle filter
2 Lock release

Connector plug for measuring
instrument
5 Probe handle

1

4

3 Probe module

6 Connection cable1612 First steps

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

12.2 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 andusing 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•

12.2.1.1

Charge level of 50 to 80%

Charge energy storage unit

1 Connect the instrument plug of the mains unit to the mains unit socketon the measuring instrument.
2 Connect the mains plug of the mains unit to a mains socket.
charging process starts. LED in The
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 timeat room temperature is approx. 5-6 hrs.

17

12 First steps

12.2.1.2

Mains operation

1 Connect the instrument plug of the mains unit to the mains unit socketon 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.
instrument is switched off and an energy storage unit is inserted, Ifthethecharging
process will start automatically. Switching the measuring
instrument on stops the charging of the energy storage unit and themeasuring 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.

12.3 Touchscreen operating concept
Familiarize yourself with the touchscreen operating concept before you use themeasuring instrument.
Actions are mostly carried out by:
Description
Tapping
To open applications, select menu symbols,press buttons on the display or enter characterswith the keypad, in each case tap these with afinger.

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.

18

12 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 themeasurement parameters.

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

✓ Input field is enabled (flashing cursor)
1 Enter value: tap the required valueon the display (figures, numericalvalue, unit, characters).

2

Confirm entry: Press.

3 Repeat steps as required.

19

12 First steps

12.5 Switching the instrument on and off
Current
statusActionFunction

Instrument
off

Press the button fora long time (> 3 s)

Instrument is switched on.

When the measuring instrument is started for the first time, the setup
wizard guides you through the following setting parameters step bystep:- 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 importantfunctions of the measuring instrument using examples.
Instrumenton

Press the button
briefly (< 1 s)

Instrumenton

Press the button fora long time (>1 s)

Instrument is switched to standby mode.
The instrument is re-activated when the
button is pressed again.
Selection: [OK] Instrument is switched
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 powersave mode. After pressing the key, a restart takes place after thezeroing phase.

Unsaved readings are lost when the measuring instrument is switched
off.

20

12 First steps

12.6 Connect probes
Flue gas probes✓ Instrument is switched on.
1 Insert the connector plug into the fluegas socket and lock it in place byturning it slightly clockwise (bayonetlock).

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 theprobe 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.".
21

12 First steps

12.7 Connecting Smart Probes and testo
Smart AppThe testo 300 NEXT LEVEL has the option of establishing a Bluetooth ®
connection with wireless probes via the testo Bluetooth® Connector as well as aconnection 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.

12.7.1 Attaching the testo Bluetooth® Connector(0554 3004)
Once the testo Bluetooth® Connector is plugged in, all the warning andsafety 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 NEXTLEVEL.

connected, a testo Bluetooth Connector icon appears in the Whentesto 300 NEXT LEVEL status display.
®

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

22

12 First steps

2 Press the ON button on the Smart
Probe.

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

the Smart Probe is connected Oncewith the testo 300 NEXT LEVEL, thisreading appears on the display. The
product name and the product ID (lastthree 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 thetesto Bluetooth® Connector. The testo Bluetooth® Connector thenreceives 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.

23

12 First steps

12.7.2 Smart Probes compatible with the
instrument
Order number

Designation

0560 2115 02

testo 115i - clamp thermometer with smartphone
operation
testo 510i - differential pressure measuring instrumentwith smartphone operation
testo 915i - temperature probe with smartphone
operation

0560 1510
0563 3915

12.7.3 Establishing a connection with the testo
Smart AppIn order to establish a connection, you need a tablet or smartphone withthe 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:

24•

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.

12 First steps

12.7.3.1

App user interface

Element

Element

1 Main menu
3 Instrument status bar
5 Current testo 300 NEXT LEVEL
instrument status
7 Create measurement report

2 Readings from testo 300 NEXT
LEVEL
4 Configuration
6 Fuel selected in testo 300 NEXT
LEVEL
8 Remote measurement start/stopon testo 300 NEXT LEVEL

9 Remote save of measurement on
testo 300 NEXT LEVEL

12.7.3.2

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 andcarry 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.
2512 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 ortablet and the measurement can be controlled from both devices.

12.7.4 Connecting for the first time1

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 automaticallyrecognised by the testo Smart App and the connection is established.
4 Click on Apply Configuration.

 The connection is automatically established.
26

12 First steps

12.7.5 Carrying out the measurement
1 Open the testo Smart App.
2

Click on Measure.

3 Click on the testo 300 Second Screen measurement program.
connection to the testo 300 NEXT LEVEL is automatically Theestablished (this may take a few seconds).
Once the connection has been established between the App andtesto 300 NEXT LEVEL, the App will be in Second Screen mode. This
represented by a yellow frame in the App. This means that allmeasurement data from the testo 300 NEXT LEVEL is mirrored on theApp. 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 theconnection is being established.
To establish a connection, the Smart App connection must be activatedon the testo 300 NEXT LEVEL.
To establish a connection, the WLAN must be activated on thesmartphone/tablet.

12.7.6 Settings – language
1

Click on Settings.

 The Settings menu opens.
2 Click on Language.

 A window with different languages opens.
27

12 First steps

3 Click on the required language.

 The required language is set.
12.7.7 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.

12.7.7.1

Instrument information

1

Click on Help and Information.

 The Help and Information menu opens.
2 Click on Instrument information.
current App version, Google Analytics instance ID, refrigerant Theversion 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.

12.7.7.2
1

Tutorial
Click on Help and Information.

 The Help and Information menu opens.
2 Click on Tutorial.
tutorial shows you the most important steps prior to Thecommissioning.

12.7.7.3

Exclusion of liability

1

Click on Help and Information.

 The Help and Information menu opens.
2 Click on Exclusion of liability.

28

13 Using the productdata protection information and licence usage information is The
displayed.

13 Using the product13.1 User interface

1
2

Measuring applications
Status bar

3Main menu

4Open Fuels selection list

5

Select Customer/Measuring site
Select reading display type:• List

6

•

Chart

•

Corestream

78
9

Edit measurement data
Start measurement
Pause measurement
Stop measurement
Options29

13 Using the product
Further symbols on the user interface (without numbering)
Retry measurement
One level back
One level back
One level backCancel process
Print values
Save report
Save and send report
Generate QR code

13.1.1 List reading display typeThe measurement parameters/units and the number and order of themeasurement 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 andon the report printouts.
The settings only apply to the measurement type currently enabled.

30

13 Using the product13.1.2 Graphics reading display typeIn 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 onin order to open selection list for measurement
parameters/units.
3 Select desired measurement data / units.

 Selection is accepted automatically.

31

13 Using the product13.1.3 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 fluegas temperature Max FT).
- Grey value/grey pointer: Displayof current flue gas temperature- Orange value/orange pointer:
Display of maximum flue gas
temperature- Reset values/pointer:32

13 Using the product13.2 Overview of main menu ()

Main menu

Description

Customer/Measuring site

Create, edit and delete customer and system
information.
Call up, delete and send measurements thathave been performed (various formats
possible).
Call up and delete measurement report.

Protocols

Saved reports
Second Screen
Gas path check

Connection to the testo Smart App can be
activated or deactivated.
For flawless operation of the measuring
instrument, regular tightness testing of
measurement systems (measuring
instrument + flue gas probe) is
recommended.

33

13 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
Overview of the sensors fitted and theircondition.
Call up error reports
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
Information about the available server

Sensor Diagnosis
Error List
Device information

Server information
E-Mail34

Set up e-mail account and the e-mailaccount 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.

13 Using the product

Main menu

Description

My Apps

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

Help

13.2.1.1

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:

1 Search2

3

View/edit existing data about
Customer / Measuring site

Create new Customer / Measuring
site

35

13 Using the productSearch
1 Tap Search operating field.

 Text cursor flashes.
2 Enter search test using the text editor.
Via the search text, only the Customer / Measuring site isdisplayed 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 mustbe filled in.
5 Save.

 Customer is created.
In order to be able to select a customer, at least one measuring sitemust be created and selected!
Create new measuring site

✓ A customer is created.
1 Tap Measuring site button.
2 Tap + New measuring site operating field.

36

13 Using the product Measuring site parameters menu is opened.
3 Enter data.
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.

13.2.2 Protocols
1 Call up function:| Protocols

 Protocols menu is displayed.
2 Select customer.
3 Open measuring site.
37

13 Using the product4 Measurements for the selectedcustomer/measuring site can beviewedand 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. forMicrosoft® Excel)
- PDF
- QR
- QR_ZIV- ZIV 2.00 (XML file, complying with theregulations 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.

38

13 Using the productCategory

Description

Select measurements

All saved measurements are displayed in one of
the following time categories, depending on thecreation 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
orBack 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.

13.2.3 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.
OI File Manager folder is opened and the available reports are The
displayed.
Open report
1 Tap required report.

 Report is displayed as a PDF.
Delete report(s)1 Touch required report for >2 sec.

39

13 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 tapping3

Tapsymbol.

4 Tap Send.
5 Send report by e-mail.
Sort report(s)1Tapsymbol.

2 Tap Settings.
3 Disable in ascending order under sort settings.

 The latest reports are displayed first.
40

13 Using the product13.2.4 Second Screen
In the Second Screen menu item, the Smart App connection can be activated ordeactivated. This is also where the connection PIN required for the initialconnection is stored.
To connect the testo 300 NEXT LEVEL to your smartphone or tablet, theSecond 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.

13.2.5 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.
pump flow is displayed. If the flow rate is less than 0.02 l/min, the 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.

13.2.6 Device settings
13.2.6.1

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.

41

13 Using the productThe country version configuration affects the user interface languages that canbe enabled.
1 Call up function:
language| Device Settings | Country version and

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 bycancelling. The display goes back to Device Settings.
selected country version is configured (this may take a few
 The
minutes). The Device Settings menu is then displayed.

 Restart the measuring instrument to complete its configuration.

42

13 Using the productSet language✓

Country & language settings menu

1 Tap Language selection field.
available languages for the selected country version are Thedisplayed.
2 Select Language and tap.

 The instrument is reconfigured to the selected language.
1 Back to the main menu: tap

13.2.6.2

and.

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.
of all available Wireless LAN routers or Wireless LAN hotspots
 Displayin 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 WirelessLAN.

 Connection is set up and shown by Connected.

43

13 Using the product

Further entries via

buttonCategory

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.

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.

13.2.6.3

Date/TimeYou can set the date, time and time zone in the Date/Time menu. You canchoose 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.

setting options are displayed. Depending on your
 Various
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 (2 Back to the Device Settings menu: Tap
44) / AM/PM ( )||.

13 Using the productSet Date/Time manually
1 Tap Date/Time.
2 Tap Autom. Date/Time.

3 Select Off.

Date/Time is disabled. The pop-up window closes
 Autom.
automatically.
4 Tap Set Date.
5 Select date via the calendar and confirm with OK.
6 Tap Set Time.
7 Tap hour and set.

45

13 Using the product8 Tap minute, set and confirm with OK.
9 Back to the Device Settings menu: tap

|

|

.

|

|

.

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

13.2.6.4

Own company addressEnter 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

13.2.6.5.

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.

1

46

Call up function:| Device Settings | Hotspot

13 Using the product2 By tapping the selection field, enable ()/disable (3 Back to the Device Settings menu: tap.

) Hotspot.

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

13.2.6.6
1.

Rechargeable battery management

Call up function:
management| Device Settings | Rechargeable battery

2 Select between the standby options by tapping the selection field.
3 Back to the Device Settings menu: tap

13.2.6.7
1.

Display brightness

Call up function:| Device Settings | Display brightness

2 Adjust the display brightness using the slide control.
3 Back to the Device Settings menu: tap

13.2.6.8
1.

Manage e-mail accounts

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.

47

13 Using the product13.2.6.9

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)•

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 ofboth 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.

13.2.6.10 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.

13.2.6.11 O2 reference
The O2 reference value of the current fuel can be set.
1

Call up function:| Device settings | O2 reference O reference current fuel input screen is opened.
2

2 Enter the value via the keypad.
3 Confirm input with48.

13 Using the product4 Tap [OK].

13.2.6.12 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.
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].

13.2.7 Sensor diagnosis
Overview of the sensors fitted and their condition.
1

Call up function:| Sensor Diagnosis

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

13.2.9 Device information
Call up device information.
1

Call up function:| Device information

13.2.10 Server information
Information about the available server.
1
Call up function:| Server information49

13 Using the product13.2.11 E-mailSetting up an e-mail accountAn 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 theaccount up.
1

Call up function:| E-Mail

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 thesent 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:

50•

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 toacknowledge before the e-mail account can be accepted on the
testo 300 NEXT LEVEL.

•

Enable IMAP accountTo do this, call up your e-mail account on the PC. You will find thesetting 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 account1.

Call up function:

2.

Enter e-mail address.

3.
4.

Select Manual set-up.
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 suppliedby your e-mail account provider. Find out about this fromyour account provider or on the Internet.

| E-Mail.

13 Using the product7.

[Next]

8.

9.

Enter/change SMTP server, port and security type.
This information is e-mail account specific and is suppliedby your e-mail account provider. Find out about this fromyour account provider or on the Internet.
[Next]

10.

Set account options, such as synchronization interval.

11.

[Next]

12.

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

13.

 The inbox of the e-mail account is opened.
Call up e-mail account1

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.

51

13 Using the product13.2.12 My Apps
Additional applications
1
Call up function:| My Apps

 Available Apps are displayed.
SymbolName
Alarm clock
Gallery
Browser
CalendarCalculator
Quick Support

52

13 Using the product13.2.13 Help
13.2.13.1 Device registration
1 Call up function:| Help | Device Registration

Testo would like to offer you the best possible customer service. Register yourinstrument 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 backof 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

13.2.13.2 Tutorial
1 Call up function:| Help | Tutorial

The tutorial provides you with an overview of and an introduction to theoperation and functions of the instrument.

13.2.13.3 Setup Wizard
1 Call up function:| Help | Setup Wizard

2 The following settings can be made:Function

SectionCountry version and language

8.2.6.1

WLAN

8.2.6.2

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.
53

13 Using the product13.2.13.4 Wireless firmware update
Make sure that Enable update for connected instruments under
Help and Information I Instrument information is always activated.

✓ 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.
54

13 Using the product 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.
the update, the measuring After
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.

55

13 Using the product13.2.13.5 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 themeasuring instrument, then connect it to the PC.

 Your PC identifies the measuring instrument as a removable medium.
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.
the instrument software has been updated (duration approx. 1.5
 Oncehrs), the measuring instrument will automatically reboot and is ready for
use again.

56

14 Performing the measurement

14 Performing the measurement
14.1 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 andreplace it in good time. If necessary, see Section 10.10 Check/replaceparticle filter.

14.1.1 Zeroing phases
Measuring the combustion air temperature (AT)
If no external combustion air temperature probe or testo 915i Smart Probe isconnected, 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 fluegas:
The flue gas probe must be in fresh air during the zeroing phase (30seconds)!
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 thezeroing 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 calledup.
testo 300 NEXT LEVEL without probe zeroing option in the fluegas:
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 thezeroing phase. The pressure socket of the instrument must be free
(depressurized, not closed).

57

14 Performing the measurement

14.1.2 Carry out gas path check
Regularly check the measurement system (measuring instrument + fluegas probe) for leaks.
In particular, too high an O2 value may be an indicator of a leaking
measurement system.
>| Gas path check.

14.1.3 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 ifnecessary.
Align flue gas probe> The thermocouple must be freely
exposed to the flue gas flow.
Align the probe by turning it asrequired.

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.

58

14 Performing the measurement

4 Align the flue gas probe in the fluegas 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.

59

14 Performing the measurement

14.2 Overview of measurement types (Measurement types
Flue gas
Draught
BImSchVCO undiluted
Smoke No.
Differential pressure
Differential temp.
O2 Air
Gas flow
Oil flow
CO ambient
Tightness test 1
Tightness test 2
Let by test
4 Pa measurement60)

14 Performing the measurement

14.2.1 Flue gas
In order to maintain the measuring accuracy of the instrument, thecorrect 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 andcontinuously 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

2 Start measurement: tap.

61

14 Performing the measurement

 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 tothe flue gas measurement. In the List measurement data view, theparallel draught measurement can be stopped/restarted. This draught
measurement is performed separately to a measurement of theDraught 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
4 End measurement: tap

ornext to it.

.

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.
Connected cable probe(maximum 1 possible)

No

Yes

Yes

No

62

Number of connected Smart
Display and use of theProbestemperature probe in testo(testo 115i and/or testo
300 NEXT LEVEL
915i)
t115i: additionaltemperature channel T
1
t915i: AT probe for the AT
measurement
Cable probes: AT probe for
the AT measurement
Cable probes: AT probe for
the AT measurement1
t115i/ t915i: additionaltemperature channel T
Internal temperature sensor
t300 NEXT LEVEL: AT
probe for the AT2measurementt115i/t915i: additionaltemperature channel dT

14 Performing the measurement

Connected cable probe(maximum 1 possible)

Yes

Number of connected Smart
Display and use of theProbestemperature probe in testo(testo 115i and/or testo
300 NEXT LEVEL
915i)
Cable probes: AT probe for
the AT measurement2
t115i/t915i: additionaltemperature channel dTA) min. one t915i connected
t915i: AT probe for the AT
measurementt115i/t915i: additionaltemperature channel dT

No

3

Yes

3

No

4

Yes

4

B) no t915i connectedInternal temperature sensor
t300 NEXT LEVEL: AT
probe for the AT
measurementt115i: additionaltemperature channel dTand temperature channel T
Cable probes: AT probe for
the AT measurementt115i/t915i: additionaltemperature channel dTand temperature channel T
Internal temperature sensor
t300 NEXT LEVEL: AT
probe for the AT
measurementt115i/t915i: 2 additionaltemperature channels dT
Cable probes: AT probe for
the AT measurementt115i/t915i: 2 additionaltemperature channels dT63

14 Performing the measurement

14.2.2 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

64.

14 Performing the measurement

14.2.3 1st BImSchV•

Do not operate the product if there are signs of damage on the
housing, mains unit or connected cables.

•

The product must be checked for any visible damage before
commissioning.

•

Do not store any solvents (e.g. isopropanol) or items containing
solvents in the case, as the vapours can damage the sensors.

In the case of the 1st BImSchV, the Smart Probe testo 915i (0563
3915) can be connected allowing the combustion air temperature to bemeasured in parallel.
•

The measuring instrument has been tested according to the requirements of
VDI 4206 part 1.

•

The following fuels are approved for measurements according to the 1st
BImSchV:Fuel

CO2max[vol.%]O2base[%]

VAG

VLmin

A2

B

trmin

Natural
gas

11.9

3.0

8.36

9.12

0.66000.0090Fuel oil
EL

15.4

3.0

10.53

11.26

0.68000.0070

LPG

13.7

3.0

23.80

25.95

0.63000.0080Town gas

13.6

3.0

3.61

3.90

0.63000.0110Briquettes

18.9

8.0

5.08

5.20

0.83300.0000Lignite

19.8

8.0

4.01

4.09

0.95500.0000Hard coal

20.5

8.0

7.81

7.82

0.75800.0000Wood 15%w
Wood
pellets

20.3

13.0

3.87

3.93

0.68600.0096

20.3

13.0

4.07

4.13

0.62000.0081•For official measurements in accordance with the first German Federal
Immission Control Ordinance (BImSchV), the measuring instrument must be
checked every six months by a technical testing body of the Guild of Master
Chimney Sweeps or another testing body recognised by the authorities.
To achieve usable measurement results, the measurement period forflue gas should be approx. 3 minutes and the measuring instrument
should display stable measured values. Readiness for operation isachieved after a maximum of 10 minutes.

65

14 Performing the measurement
A qA mean value measurement can be carried out. For this purpose, the meanvalue is determined continuously over a period of 30 seconds, with themeasuring cycle taking 1 second. The current mean values at the correspondingtime of recording are displayed.
✓ A flue gas probe and a combustion air temperature probe or the Smart
Probe testo 915i must be connected.
1 Call up function:| 1st BImSchV

2 Start measurement: tap.

3 Zeroing is carried out.
4 Position the flue gas probe in the core flow (area of the highest flue gas
temperature). The display of the maximum measured flue gas
temperature in the core flow helps when positioning the flue gas probe.

 Measurement can be started as soon as the O reading is below 20%.
2

5 tap

.

qA readings (O , AT, VT) and the draught readings are Thedetermined (30 s).
2 The readings are automatically saved.

66

14 Performing the measurement

14.2.4 44th BImSchV•

Do not operate the product if there are signs of damage on the
housing, mains unit or connected cables.

•

The product must be checked for any visible damage before
commissioning.

•

Do not store any solvents (e.g. isopropanol) or items containing
solvents in the case, as the vapours can damage the sensors.

In the case of the 44th BImSchV, the Smart Probe testo 915i (0563
3915) can be connected allowing the combustion air temperature to bemeasured in parallel.
•

The measuring instrument has been tested according to the requirements of
VDI 4206 part 1.

•

The following fuels are approved for measurements according to the 44th
BImSchV:Fuel•

CO2max[vol.%]

O2base
[%]

VAG

VLmin

A2

B

Natural gas

11.9

3.0

8.36

9.12

0.66000.0090Fuel oil EL

15.4

3.0

10.53

11.26

0.68000.0070

LPG

13.7

3.0

23.80

25.95

0.63000.0080Town gas

13.6

3.0

3.61

3.90

0.63000.0110trmin

For official measurements in accordance with the 44th BImSchV, themeasuring instrument must be checked every six months by a technicaltesting body of the Guild of Master Chimney Sweeps or another testing bodyrecognised by the authorities.
To achieve usable measurement results, the measurement period forflue gas should be approx. 3 minutes and the measuring instrument
should display stable measured values. Readiness for operation isachieved after a maximum of 10 minutes.

A qA mean value measurement can be carried out. For this purpose, the meanvalue is determined continuously over a period of 3 minutes, with the measuring
cycle taking 1 second. The current mean values at the corresponding time ofrecording are displayed.
✓ A flue gas probe and a combustion air temperature probe or the Smart
Probe testo 915i must be connected. An NO sensor must be installed.
1 Call up function:| 44th BImSchV

67

14 Performing the measurement

2 Start measurement: tap.

3 Zeroing is carried out.
4 Position the flue gas probe in the core flow (area of the highest flue gas
temperature). The display of the maximum measured flue gas
temperature in the core flow helps when positioning the flue gas probe.
(duration 3 min.) can be started as soon as of the O Measurement
reading is below 16%.
5 tap

2

.

qA readings (O , FT, AT), draught reading, CO mean value and The
NO mean value are calculated (3 minutes).
2

 The readings are automatically saved.
measuring result is displayed after the measuring phase has Thebeen completed.
If the O2 readings exceed 16% during the measurement, no meanvalues are displayed on the result screen.

68

14 Performing the measurement
Abbreviations according to DIN EN VDI 4206 part 1
FormulasymbolDesignation

CCO, B

Current CO concentration

CNOx, B

Current NOx concentration

RO

Reference oxygen content

OEM

Measured oxygen volume content in dry flue gas

qA

Flue gas losstA

Flue gas temperature in °C

FTCombustion air temperature in °C

UFexpanded uncertainty of flue gas loss

UCO, B

Expanded uncertainty of CO concentration converted toreference oxygen content

ECO, B

Result of CO concentration converted to reference oxygen
content

UNOx, B

Expanded uncertainty of NOx concentration converted toreference oxygen content

RNOx,B

Result of NOx concentration converted to reference
oxygen content

69

14 Performing the measurement

14.2.5 Solid fuel measurement
For performing solid fuel measurements complying with the 1st
BlmSchV, a testo 300 NEXT LEVEL is required with the following
equipment:

1•

CO sensor H2-compensated for measurements (measuring range
for 1st BImSchV measurement min. 20,000 ppm)•

Measuring range extension by fresh air dilution•

Solid fuel adapter and probe shaft with pre-filter 0600 9765

Call up function:

2 || Flue Gas| Options | Averaging | On

3 Zeroing is carried out.

 The list for averaging opens.
The start button changes to

4 Confirm with.

.

5 Enter measuring time (15 min). The required value can be entered in
the field.
6 Confirm with.

7 Insert the flue gas probe into the exhaust pipe and position it in the hot
spot.
8

1 Start averaging with.

 Stability time starts.
Press Continue to end the stability time manually.



After a maximum of 3 minutes, the stabilisation time ends andthe measurement starts automatically.
The system records the readings in the set measuring cycle.
During the measurement, the readings and the calculated
values are displayed.

70

14 Performing the measurement Readings are automatically saved.
measuring result is displayed after the measuring phase has Thebeen completed.
2 End measurement early:.

14.2.6 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.

14.2.7 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.

71

14 Performing the measurement

14.2.8 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).
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 themeasuring instrument.
- Do not smoke or use naked flames during the measurement.

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

✓ For an instrument with no dilution option: The minus connection fordifferential pressure measurement must be depressurized at the start ofthe measurement (ambient pressure, instrument not connected tosystem 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

72.

14 Performing the measurement

14.2.9 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 withjust 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).

✓ Two external temperature probes must be connected. Alternatively,

wireless Smart Probes such as the testo 115i or testo 915i can beused. 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.

measured values and the calculated differential temperature The
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(maximum 1 possible)

Number of connected
Smart Probes(testo 115i and/or
testo 915i)

No

1

Yes

-

Display and use of the temperatureprobe by temperature channel

Temperature channel T1: t115i/915i
dT is displayed.
Temperature channel T1: Cable probe(ext2):
T2 and dT are displayed as "---".

73

14 Performing the measurement

Connected cable probe(maximum 1 possible)

Number of connected
Smart Probes(testo 115i and/or
testo 915i)

Yes

1

No

2

Yes

2

No

3

Yes

3

No

4

Yes

4

74

Display and use of the temperatureprobe by temperature channel

Temperature channel T1: Cable probe(ext2):
Temperature channel T2: t115i/915i:
dT is displayed.
Temperature channel T1: t115i/915i
Temperature channel T2: t115i/915i:
dT is displayed.
Temperature channel T1: Cable probe(ext2):
Temperature channel T2: t115i/915i:
dT is displayed.
Temperature channel T3: t115i/915i:
T4 and dT are not displayed.
Temperature channel T1: t115i/915i
Temperature channel T2: t115i/915i:
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.
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.
Temperature channel T3: t115i/915i
Temperature channel T4: t115i/915i
dT is displayed.
Temperature channel T1: Cable probe(ext2):
Temperature channel T2: t115i/915i
dT is displayed.
Temperature channel T3: t115i/915i
Temperature channel T4: t115i/915i
dT is displayed.
Temperature channel T5: t115i/915i

14 Performing the measurement

14.2.10 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.

14.2.11 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.

 The test time is displayed.
5 When the set gas amount is reached: tap.

calculated gas flow and the gas burner capacity (in KW) are Thedisplayed.

75

14 Performing the measurement
Edit values
All values that can be modified have a dotted underlining.

14.2.12 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 oilpressure 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.

14.2.13 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 ofmeasurement. Frontal flow onto the sensor leads to higher
readings. The best measurement results are achieved when theprobe is moved gently backwards and forwards.

•

When using the ambient CO probe and the flue gas probe, notethat:
The probe must be in the fresh air (CO-free) during the zeroingphase.

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:

76| CO Ambient14 Performing the measurement

2 Start measurement: tap.

 Reading is displayed.
3 End measurement: tap.

14.2.14 Tightness test 1
The tightness test 1 (using air or inert gas such as CO2 or N2) is a tightness testfor 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 ofexisting 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, notclosed).

✓ Pressure zeroing has been carried out.
1 Call up function:| Tightness test 1.

2 Set parameters or enter values.
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 DVGWTRGI 2018 should be observed to ensure that any possible pressure77

14 Performing the measurement

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.
readings are automatically saved and displayed after the Themeasurement has been completed.
5 The measuring value result can be assessed.
6 Conclude measurement: tap Next.
7 If applicable, repeat measurement: tap.

14.2.15 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 theactual 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 beentered to obtain correct readings. If this is not known, it is advisable touse 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 thismeasurement, 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).

78

14 Performing the measurement
Carrying out the measurement✓ The pressure socket of the instrument must be free (depressurized, notclosed).

 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 iscalculated 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.
readings are automatically saved and displayed after the Themeasurement has been completed.
6 The measuring value result can be assessed.
7 Conclude measurement: Tap Next.
8 If applicable, repeat measurement: tap.

79

14 Performing the measurement

14.2.16 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, notclosed).

✓ 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.
readings are automatically saved and displayed after the Themeasurement has been completed.
4 The measuring value result can be assessed.
5 Conclude measurement: tap Next.
6 If applicable, repeat measurement: tap

80.

14 Performing the measurement

14.2.17 4 Pa measurement
The 4 Pa measurement is only available with instruments that have thedilution 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.
readings are automatically saved and displayed after the Themeasurement 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) incollaboration with differential pressure measuring instrument manufacturers, theTÜV SÜD Industrie Service GmbH test centre, firing and heat technology, andthe 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 inrooms with air extraction equipment. However, insofar as no dangerous
underpressure can arise while the firing installations are in operation,81

14 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 andinspection equipment in the area of underpressure measurement, along withspecifications for carrying out qualification tests.
Description of typical measuring principles:With an instrument that has been tested according to these guidelines, it ispossible 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, andto 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 thesame length enable the differential pressure between the equipment room and areference 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 hoseremains 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 inrooms 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 instanceinclude the installation of a window tilt switch, the installation of anunderpressure monitor or proof by means of measuring technology that withsimultaneous 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 essentiallydepends on the local conditions. These are for instance the leaktightness of thebuilding shell, the size of the usage unit, the presence or leaktightness of thecommunicating doors and the quantity of air which is extracted from the usage
unit by the indoor air extraction systems.
82

14 Performing the measurement
It can be assumed that, with effective fume hood systems, at least 400 m 3/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 m 3/h of air).
With very high air extraction performances, an underpressure measurement isfrequently 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, themeasurement only makes sense if the owner/operator of the firing installation isabsolutely intent on having the proof of the underpressure being too high.
The area of application of underpressure measurement in equipment rooms istherefore primarily where the power of the indoor air extraction systems is
estimated to be low or there are particular physical conditions which suggestthat 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 testingfor 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 tobe determined, connect capillary hoses to the measuring instrument(reference = (-) connection, equipment room = (+) connection), open
windows, and if applicable blinds, and lay external capillary hose (forreference pressure), check zero point on the reading display, start pressure
progression recording, wait approx. 30 seconds with open window orexternal 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. Allavailable air extraction equipment should be started up. The process must
involve the measurement recording the most unfavourable condition, that isthe evaluation should be carried out with the air extraction system(s) at thehighest 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 ventilationequipment are to be kept open. The zero point should not change after
starting up the firing installation and air extraction equipment with thewindow or external door of the equipment room open.
3. Close door/window, wait approx. 30 seconds, check underpressure, checkclean extraction of the flue gases. If a blind is present on thewindow/external door of the equipment room, this should be closed andopened at the same time in each case.

83

14 Performing the measurement
4. Open door/window, wait approx. 30 seconds, zero line must be reachedagain.
5. Close door/window, wait approx. 30 seconds, check underpressure, checkclean extraction of the flue gases.
6. Open door/window, wait approx. 30 seconds, zero line must be reachedagain.
7. Close door/window, wait approx. 30 seconds, check underpressure, checkclean extraction of the flue gases.
After the measurement, the result can be printed out and evaluated. If theunderpressure in the room where the firing installation(s) is/are set up isconstantly 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 thebuilding (e.g. windows and doors). A new evaluation is required when there is achange 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 atechnical test centre of the Guild of Master Chimney Sweeps.

84

14 Performing the measurement

14.3 Overview of options (Options
Edit measurem. view

Zeroing Gas Sensors)

Description
Add (add), delete ( ) measurement
parameters,change display sequences ( ) and units (clickon (Unit).
Manually zeroing gas sensors.
Menu is only available for measurementswith gas sensors.

Zeroing Smart Probes

Zero the differential pressure Smart Probe.
The menu is only available formeasurements with the Smart Probe testo
510i.

Averaging | On

Calculation of a mean value within a preset
time.

85

14 Performing the measurement

14.3.1.1
1

Edit viewCall up function:| Options | Edit View

 Edit View menu is opened.
2 Measurement parameter- Add: tap Add to open selection list of measurement parameters.
- Delete: tap on.
- Edit unit: tap on the measurement parameter you want to edit. Tapon the required measurement unit in the selection list that has been
opened.
- Change position in the list: Press and holdand drag to therequired position.
- Accept changes: tap Confirm.
Selection list (example: Country version Germany)
The overview of measurement parameters (available selection depends on thechosen 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

Oxygen86

14 Performing the measurement

Display

Measurement parameter

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

Effg

Efficiency with consideration of the calorific value range

Draught

Flue draught

ΔP

Differential pressure

CO

Carbon monoxideuCO

Undiluted carbon monoxide

NO

Nitrogen monoxide

NOx

Nitrogen oxides

λFuel-air ratio

AmbCO

Ambient carbon monoxide

O2ref

Oxygen reference

ΔT

Differential temperature

Dew PtFlue gas dewpoint temperature

Smoke 1
Smoke 2
Smoke 3
Smokenumber Ø
Only those measurement parameters and units that are enabled in thereading 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.

87

14 Performing the measurement

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

 The gas sensors are zeroed.
testo 300 NEXT LEVEL without probe zeroing option in the fluegas:
The flue gas probe must be in fresh air during the zeroing phase (30seconds)!
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 thezeroing phase (30 seconds).

14.3.3 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 canbe 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 with88.

14 Performing the measurement
time begins. It can be terminated manually by selecting • Stabilization
Next.
•

After a maximum of 3 minutes, the stabilization time ends and themeasurement starts automatically.

•

The system records the readings in the set measuring cycle.

•

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:.

89

14 Performing the measurement

14.4 Overview of protocols ()

Protocols
Print values

FeaturePrint out measuring values via Bluetooth®.

Save

Save measuring values, including selectedcustomers/measuring sites. Saved measuring
values can be retrieved in the main menu.
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.

Finish protocol

Share

90

Transfer to external software- via QR Code- share TJF file

14 Performing the measurement

14.4.1 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 besupplemented 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.

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

.

 Protocols menu is opened.
2 Tap Save.

 The measurement protocol is saved.
Only saved readings can be further processed at a later stage for areport.

91

14 Performing the measurement

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) (DEcountry version)•

Averaging (IT country version)

14.4.3 Finish protocol
1 tap

.

 Protocols menu is opened.
2 Tap Finish protocol.

 Options for Protocols are opened.
3 Enter/select log data:
Category
Format and print

Description

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 withthe regulations of the ‘Federal
Association of the Chimney
Sweeps in Germany’)- ZIV (XML file, complying with theregulations of the Federal
Association of Chimney Sweeps inGermany).
Customer data
Enter contact details
Comments and pictures Enter comments and add pictures.

92

14 Performing the measurement

Select measurements

All saved measurements are displayedin 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 forthese customers are automatically
identified.
To display saved readings to check
them:
➢
.
To delete individual measurement:➢.
To delete all measurements of a timecategory:➢tap
next to the time category
name.
To select/deselect a measurement for
the report:➢.
Tap Sign Report and sign.
Options:
Abort, Reset and Save

Signature

4
Print values: tap.

To save readings: tap.

Save and send report: tap
Generate QR code: tap

.
.

93

15 Maintenance

15 MaintenanceFr d

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

15.2 Calibration
The measuring instrument is supplied with a calibration protocol asstandard. 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.

15.3 Check instrument status
15.3.1 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.

15.3.2 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.

94

15 Maintenance15.4 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.

IMPORTANT
Leaking solvents and degreasers!
Damage to the instrument and sensors!
The following substances can cause damage to the device or the sensors:- Solvent-containing vapours such as those contained in cleaning agents,
degreasers, wax polishes and adhesives- Formaldehyde
Do not store cleaning cloths, 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.

15.5 Drain condensate container
The fill level of the condensate container can be read from the markings. Holdthe 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.

95

15 Maintenance

CAUTION
Condensate entering the gas path!
Damage to sensors and flue gas pump!
- Do not empty condensate container while the flue gas pump is inoperation.
1 Open the condensate outlet on thecondensate container.

2 Let the condensate run out into asink

3 - Wipe off any drops still on the condensate outlet with a cloth and closethe condensate outlet.
The condensate outlet must be completely closed, otherwise incorrect
measurements could occur due to infiltration of external air.

96

15 Maintenance15.6 Open the measuring instrument
Only open the measuring instrument when this is required for maintenancepurposes (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 thework surface.
1 Place the instrument on its front so that the back is facing upwards.
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.

97

15 Maintenance

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.

15.7 Replace sensors
A slot bridge (0192 1552) must be inserted in slots which are notequipped 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.

98

15 Maintenance15.8 Replace O2 sensor
CAUTION
Acid in the sensors.
May cause chemical burns.
- Do not open the sensors.
- Always wear gloves when changing a sensor.
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.

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

1 Unlock retaining bracket and openout.

2 Remove faulty sensor from the slot.
3 Insert new sensor in the slot.
Make sure that the socket on thesensor circuit board is correctly
connected to the contact plug.

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

99

15 Maintenance

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

15.8.1 Change CO, CO H2 and NO sensor
CAUTION
Acid in the sensors.
May cause chemical burns.
- Do not open the sensors.
- Always wear gloves when changing a sensor.
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.

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

1 Remove faulty sensor and hoseconnections from the slot.

2 Remove hose connections from thefaulty sensor/bridge.

10015 Maintenance

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 hoseconnections onto the gas path connections.
Make sure that the socket on the sensor circuit board iscorrectly connected to the contact plug.
5 Close the measuring instrument.

15.9 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 andremove probe module.
2 Blow compressed air through flue gas
ducts of the probe module and probe
handle (see illustration). Do not use abrush!

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

101

15 Maintenance15.10 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.

15.11 Check/replace particle filter
Check particle filter•

Particle filters of the modular flue gas probe must be checked regularly forcontamination: 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.
1 Open filter chamber: turn slightly
anti-clockwise.

102

15 Maintenance

2 Remove filter chamber.

3 Remove filter plate and replace itwith a new one (0554 3385).

4 Attach the filter chamber and lock it:turn slightly clockwise.

15.12 Replace thermocouple
1 Release probe catch by pressing the key on the probe handle andremove probe module.
2 Remove thermocouple plug-in headfrom the socket using a screwdriverand pull thermocouple out of the probe
shaft.

3 Insert new thermocouple into the probe shaft until the plug-in headclicks into place.
4 Fit probe module onto the probe handle and click into place.

103

16 Technical data

16 Technical data
Technical data for testo 300 NEXT LEVEL
FeatureValue

Temperature measuring instrument
Draught measurement
Pressure measurement
O2 measurement
CO measurement
Option: CO measurement(H2-compensated)
Option: CO measurement(H2-compensated: COlow sensor)
Option: CO measurement with activatedfresh air dilution/measuring range
extension
Option: CO measurement(H2-compensated) with activated fresh
air dilution/measuring range extension-40 to +1200 °C-9.99 to +40 hPa-100 to 200 hPa
0 to 21 vol.%0 to 4,000 ppm
0 to 8,000 ppm

Option: NO measurement
Option: NO Measurement with NOlow
sensorEfficiency testing (Eta)
Flue gas losses
CO2 determination (calculation from O2)
Ambient CO measurement (internal/fluegas probe)
Ambient CO measurement (external with
CO probe)
Service life O2 sensor
Service life CO sensor
Service life NO sensor
Service life COlow sensor
Service life NOlow sensor

104

0 to 500 ppm
0 to 15,000 ppm

0 to 30,000 ppm

1st BimSchV, measurement 20,000
ppm
0 to 3,000 ppm
0 to 300 ppm
0 to 120%
0 to 99.9%
Display range 0 to CO2 max.
0 to 2,000 ppm
0 to 500 ppm
Up to 72 months depending on load
Up to 72 months depending on load
Up to 72 months depending on load
Up to 72 months depending on load
Up to 72 months depending on load

16 Technical data
General technical data
FeatureValue

Storage temperature
Operating temperature
Charging temperature
Energy storage unit
Mains unit
Humidity application range
Power supply
Energy storage unit service life
Lifetime energy storage
Protection class
Memory
Display-20 to +50°C-5 to +45°C-0 to +45°C
3.6 V/3.5 Ah
5V/1A
15 to 90% RH, non-condensing
Energy storage unit, USB mains unit
10 hrs> 1000 charging cycles / approx. 5 years
IP 40
1 million measuring values
5.0" touch display,
HD 1280x720 pixels
Approx. 800 g
L: 244 mm (including probe connection)
H: 59 mm
W: 98 mm.
TÜV-tested according to 1st German
Federal Immission Control Ordinance(BImSchV) EN 50379, Parts 1-3

WeightDimensions

Certification

Technical data for testo 915i
FeatureValue

Battery type
Battery life
Data transmission
Wireless range
Operating temperature
Storage temperature
Protection class
Measuring range
Accuracy
Solution
Dimensions

3 x micro batteries AAA
150 h at +25 °C and measurement cycle 1 sBluetooth®
Up to 100 m with no obstructions-20 to +50 °C-20 to +60 °C
IP 40-50 to +400 °C±1.0 °C
0.1 °C
Handle: 129 x 31 x 31 mm
Probe: length 99 mm/diameter 4 mm
3-colour LED (orange/red/green)
1sPower indicator
Measurement/connection
cycle
Auto Off

After 10 minutes without Bluetooth® connection105

16 Technical data

Technical data for testo 510i
FeatureValue

Battery type
Battery life
Data transmission
Wireless range
Operating temperature
Storage temperature
Measuring range
Accuracy

3 x micro batteries AAA
150 h at +25 °C and measurement cycle 2 sBluetooth®
Up to 100 m with no obstructions-20 to +50 °C-20 to +60 °C-150 to +150 hPa±0.05 hPa (0 to +1 hPa)
±0.2 hPa + 1.5% of m.v. (+1 to +150 hPa)
0.01 hPa
148 x 36 x 23 mm
3-colour LED (orange/red/green)2s

Solution
Dimensions
Function indicator
Measurement/connection
cycle
Auto Off

After 10 minutes without Bluetooth® connection

Technical data for testo 115i
FeatureValue

Battery type
Battery life
Data transmission
Wireless range
Operating temperature
Storage temperature
Measuring range
Accuracy
Solution
Dimensions
Power indicator
Measurement/connection
cycle
Auto Off

3 x micro batteries AAA
150 h at +25 °C and measurement cycle 1 sBluetooth®
Up to 100 m with no obstructions-20 to +50 °C-20 to +60 °C-40 to +150 °C±1.3 °C
0.1 °C
183 mm x 90 mm x 30 mm
3-colour LED (orange/red/green)1s

106

After 10 minutes without Bluetooth® connection

16 Technical data
Technical data for Bluetooth® Connector
FeatureValue

Storage temperature
Operating temperature
Humidity application range
Operating altitude
Level of contamination
Mains unit
Voltage tolerance
Protection class
WeightDimensions-5 to +45 °C-5 to +45 °C
15 to 90 %RH, non-condensing<= 2,000 m
PD 2
5 VDC/ 6 mA
±10%
IP 40
Approx. 6.5 g
L: 23 mm
H: 27 mm
W: 18 mm

16.1 Contact and support
If you have any questions or need further information, please contact yourdealer or Testo Customer Service. For contact details, please visit
www.testo.com/service-contact.

107

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 11 – 04.2024