TESTO 327 User manual

Instruction manual en
testo 327
Flue gas analyser, country-specific version GB

Contents2
Contents
Contents ................................................................................................2
Safety and the environment ....................................................................3
EC declaration of conformity ..................................................................7
Product description ................................................................................8
First steps ..............................................................................................9
Using the product ..................................................................................12
Preparing for measurement ....................................................................12
Performing the measurement ..................................................................14
Checking the instrument ........................................................................18
Maintaining the product ........................................................................19
Tips and assistance ..............................................................................25
Accessories and spare parts ................................................................26
Appendix ..............................................................................................27

Safety and the environment 3
Safety and the environment
About this document
❯Please read this documentation through carefully and familiarise yourself with
the product before putting it to use. Keep this documentation to hand so
that you can refer to it when necessary. Hand this documentation on to any
subsequent users of the product.
❯Pay particular attention to information emphasised by the following symbols:
· With the signal word Warning!:
Warns against hazards which could result in serious physical injury if the
precautionary measures indicated are not taken.
· With the signal word Caution!:
Warns against hazards which could result in minor physical injury or damage
to equipment if the precautionary measures indicated are not taken.
· Additional information.
Avoiding personal injury/damage to equipment
❯Do not make measurements with the measuring instrument and its sensors
on or near live components unless the instrument is expressly approved for
current/voltage measurements!
❯Never store the measuring instrument together with solvents and do not use
any desiccants.
❯Only operate the measuring instrument properly, for its intended purpose
and within the parameters specified in the technical data. Do not use force.
❯Only carry out the maintenance and repair work that is described in the
documentation. Follow the prescribed steps exactly. Only use original spare
parts from Testo.
Any additional work must only be carried out by authorised personnel.
Testo will otherwise refuse to accept responsibility for the proper functioning
of the measuring instrument after repair and for the validity of certifications.
❯Temperatures given on probes/sensors relate only to the measuring range of
the sensors. Do not expose handles and feed lines to any temperatures in
excess of 70 °C unless they are expressly permitted for higher temperatures.
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Specifications4
Products with BluetoothÒ (Option)
Changes or modifications, which are not expressly approved by the responsible
official body, can lead to a withdrawal of operating permission.
Interference with data transfer can be caused by instruments which transmit on
the same ISM band, e.g. microwave ovens, ZigBee.
The use of radio connections is not allowed in e.g. aeroplanes and hospitals.
For this reason, the following point must be checked before entering:
Deactivate Bluetooth function
Main menue - Settings - Buetooth - deactivate Bluetooth (Off)
Protecting the environment
❯Take faulty rechargeable batteries/spent batteries to the collection points
provided for them.
❯Send the product back to Testo at the end of its useful life. We will ensure
that it is disposed of in an environmentally friendly manner.
Specifications
Functions and use
The testo 327 is a hand-held measuring instrument for the professional flue gas
analysis of domestic and light commercial gas and oil boilers and appliances.
This includes condensing boilers and gas heaters. The unit is designed to carry
out tests shown in BS 7967, and has a timed tightness test, let by test and a
timed CO function.
These systems can be adjusted using the testo 327 and checked for
compliance with the applicable limit values.
The testo 327 is available in four versions; the scope of function varies
according to the version:
· testo 327 O2: Infrared interface
· testo 327 CO: Infrared interface
· testo 327-1 (O2, CO): Infrared interface
· testo 327-2 (O2, CO): Infrared / IRDA interface, memory, automatic sensor
diagnosis, option: Bluetooth (data interface)

Specifications 5
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Warning The testo 327 must not be used in areas at risk of explosion,
for long-term measurements or as a safety (alarm) device!
The testo 327 with the Bluetooth option may only be operated in countries in
which it is type approved (see Technical Data).
Technical data
Display variables [units] Measuring range/resolution Accuracy/response time 1)
Oxygen, via internal electro-chemical sensor (not 327 CO):
O2content [%],
O2air supply [%],
Reference value O2ref [%] 0...21% / 0.1% ±0.2% / t90 <40s
Carbon monoxide, 327-1:
CO content [ppm, mg/m³] 0...4,000ppm / 1ppm ±20ppm (0...400ppm), ±5% of reading (401...1,000ppm),
(H2share <10%) ±10% of reading (1,001...4,000ppm) / t90 <60s
Carbon monoxide, via internal electro-chemical sensor (only 327-2 with option COH2):
CO content [ppm, mg/m³] 0...8,000ppm / 1ppm ±20ppm (0...200ppm), ±5% v. Mw. (201...2,000ppm),
±10% of reading (2001...8,000ppm) / t90 <40s
Ambient Carbon monoxide, via internal electro-chemical sensor:
Ambient CO content
amCO [ppm] 0...2,000ppm / 1ppm ±10ppm (0...100ppm), ±10% of reading (>100ppm) /
t90 <40s
Temperature, via type K thermocouple of flue gas probe (NiCr-Ni):
Flue gas temperature FT,
Flue gas dew point ATP,
Ambient air AT -40...+600°C / 0.1°C, ±0.5°C (-40...100°C), ±0.5% of reading (>100°C),
-40...1,112°F / 0.1°F ±0.9°F (-40...212°F), ±0.5% of reading (>212°F) /
t98 <50s (TE 0.5mm);<100s (TE 1mm)
Temperature, via differential temperature set 0554 1208:
Flue gas socket T1 [°C, °F],
Sensor socket T2 [°C, °F] -40...+600°C / 0.1°C, ±0.5°C (-40...100°C), ±0.5% of reading (>100°C),
-40...1,112°F / 0.1°F ±0.9°F (-40...212°F), ±0.5% of reading (>212°F) /
t98 <50s (TE 0.5mm);<100s (TE 1mm)
Pressure, via internal differential pressure sensor:
Flue draught Drght [mbar,
hPa, inW, in Hg] -40...40hPa / 0.01hPa ±0.02hPa (-0.50...0.60hPa), ±0.03hPa (0.61...3hPa),
±1.5% of reading (>3hPa) /-
Flue draught Drght, with option
of precision draught [Pa] -100...100Pa / 0.1Pa ±3Pa / -
Pressure and tightness test via internal differential pressure sensor, with differential pressure set 0554 1203:
Differential pressure
Δp[hPa] -200...200hPa / 0.1hPa ±0.5hPa (0.0...50.0hPa)
(with option precision ±1% of reading (50.1...100.0hPa)
difference pressure: 0.01hPa) ±1.5% of reading (100.1...200.0hPa)
Efficiency, calculated:
Efficiency η2[%],
Efficiency η+3) [%] 0...120% / 0.1% ±0.2% / -

Specifications6
Display variables [units] Measuring range/resolution Accuracy/response time 1)
Flue gas loss, calculated
Flue gas loss qA2) [%], 0...99.9% / 0.1% - / -
Flue gas loss qA+3) [%], -20.0...99.9 / 0.1% - / -
Air ratio (not 327 CO)
Air ratio λ[-] 1...20 / 0.01 - / -
Carbon dioxide
CO2content [%] 0...CO2max / 0.01% - / -
1) Recommended minimum duration of measurement to guarantee correct readings: 3min, 2) Calorific value range not taken into account,
3) Calorific value range taken into account
Calculation formulae for calculated display variables
· See Appendix
Fuels
· Quantity: 5
· Designation/fuel parameters: See Appendix
Ambient conditions
· Operating temperature: -5...45°C/23...113°F
· Storage temperature for measuring instrument:
-20...50°C/-4...122°F,
Li-ion rechargeable battery: 0...35°C/32...95°F
Housing
· Material: ABS/PA/TPU
· Dimensions: 240 x 90 x 58mm
· Weight: Approx. 620g
· Protection class: IP40
Voltage supply
· Current source: Li-ion rechargeable battery
3.7 V/1.4 Ah (0515 0114) / 3.7 V/2.4 Ah (0515 0100),
mains unit 6.3V/1.2A
· Battery life (measuring gas pump on, display light off):
Approx. 4 h (0515 0114) / approx. 10h (0515 0100)
· Battery charge time: Approx. 5-6 h
Display
· Type: Illuminated LCD
· Updating of readings: 1/s
Directives, standards and tests
· EC Directive: 2004/108/EEC
· Tests: EN 50379, Part 2 (O2, °C, hPa),
Part 3 (CO), testo 327-2 with option
COH2 additionally: EN 50379, Part 2
(CO)
CO accuracy: independantly tested to
BS7967
Warranty
· Measuring instrument, flue gas probe: 24 months
· Measuring cells: 24 months
· Thermocouple: 12 months
· Rech. batt.: 12 months
Option Bluetooth (testo 327-2 only)
· Type-designation: BlueNiceCom IV
· Bluetooth Qualified Product Notice:
BNC4_HW2x_SW2xx
· Bluetooth listing identifier: B013784
· Bluetooth listing company: 10274
Range <10m
Option Bluetooth® Certification
EU countries
Belgium (BE), Bulgaria (BG), Denmark (DK),
Germany (DE), Estonia (EE), Finland (FI), France (FR),
Greece (GR), Ireland (IE), Italy (IT), Latvia (LV),
Lithuania (LT), Luxembourg (LU), Malta (MT),
Netherlands (NL), Austria (AT), Poland (PL),
Portugal (PT), Romania (RO), Sweden (SE),
Slovakia (SK), Slovenia (SI), Spain (ES), Czech
Republic (CZ), Hungary (HU), United Kingdom (GB) and
Republic of Cyprus (CY).
Other EFTA Countries
Iceland, Liechtentein, Norway and Switzerland
Non-european countries
Columbia, Turkey, El Salvador

EC conformity declaration 7
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EC declaration of conformity

Product description8
Product description
At a glance: Measuring instrument
➀Head: IR interface (327-2: IRDA) for
connection to Testo protocol printers,
ON/OFF switch ( ), condensate outlet.
Caution! Risk of injury from
infrared beam!
❯Do not point infrared beam at people's
eyes!
➁Display.
Display symbols
: Battery capacity( : full, : empty)
: Print function: sends data
➂Control keys
Key functions
: Function keys (3x): shows relevant function on
the display.
: Up/down keys: changes display view.
: Light key: switches display light on/off.
: Menu key.
: Cancel key.
➃Sensor socket for TC temperature probe, flue gas socket for flue gas probe,
gas outlet, mains socket
➄Sides: window of condensate trap with fill level display
➅Rear: service compartment (battery, measuring cells)
➆Rear: magnets for fixing measuring instrument to metallic surfaces.
Warning! Strong magnets can cause damage!
❯Keep well away from products which could be damaged through the effects of
magnetism (e.g. pacemakers, monitors, computers, credit cards).
➇Rear: eyelet for attaching a carrying strap (accessory).

First steps 9
At a glance: Flue gas probe
➀ Removable filter chamber with window
and particle filter
➁Probe handle
➂Connecting cable
➃Connector for measuring instrument
First steps
Charging rechargeable battery
Charge the rechargeable battery fully before using the measuring instrument.
The rechargeable battery can only be charged at an ambient temperature of
0...+35 °C. If the rechargeable battery pack has discharged completely, the
charging time at room temperature is approx. 5-6 hrs.
➣Charging the rechargeable battery in the measuring instrument:
✓The measuring instrument must be switched off.
1Connect the plug of the mains unit to the mains unit socket on the
measuring instrument.
2Connect the mains plug of the mains unit to a mains socket.
- The charging process will start. The charge status will be shown on the
display. The charging process will stop automatically when the
rechargeable battery is fully charged.
➣Charging the rechargeable battery in charger 0554 1087 (accessory):
Refer to the documentation that comes with the charger.
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➀
➁
➂➃

First steps10
Operation with the mains unit
If the mains unit is connected, the measuring instrument is automatically
powered from the mains unit. It is not possible to charge the rechargeable
battery in the measuring instrument during operation.
1Connect the plug of the mains unit to the mains unit socket on the
measuring instrument.
2Connect the mains plug of the mains unit to a mains socket.
- The measuring instrument is powered via the mains unit.
- If the instrument is switched off and a rechargeable battery is inserted,
the charging process will start automatically. Switching the measuring
instrument on has the effect of stopping rechargeable battery charging
and the measuring instrument is then powered via the mains unit.
Switching on/off
➣Switching the instrument on:
❯Press .
- Initialisation phase:
· All display segments are lit (length of time: 3 s).
· Serial number, firmware version, instrument designation, date, time and country-
specific version of instrument are displayed (length of time: 5 s).
- The Measure flue gas option is displayed.
➣Switching the instrument off:
❯Press .
- sometimes: The pump starts and the measuring cells are rinsed until the
switch-off thresholds (O2>20 %, other parameters 50 ppm) are reached.
Rinsing lasts no more than 2 minutes.
Performing instrument settings
➣Performing settings:
1Press .
2Select Settings using / and confirm entry with the OK function key.

First steps 11
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3Select the required function using / and confirm entry with the OK
function key.
Functions
1. Displ. seq: selects parameters and units of measurement and assigns a position number for the
display/protocol printouts.
2. Date/Time: sets the date and time
3. Language: sets the language.
4. Printer: sets the printer to be used.
- The selected function is opened and the position number
(Displ. seq function only) or parameter which can be set flashes.
5. Bluetooth (327-2 with option Bluetooth only): activate/ deactivate interface.
4Set the position number (Displ. seq function only)/parameter:
❯For Displ. seq function only: Select the position number to be changed
using / and confirm with the Change function key.
Alternatively: Delete the position number with Del. and insert a new
position number using Ins..
Displ. seq function: Only parameters and units of measurement which are
assigned to a position number appear in the display and on printouts.
A maximum of 20 position numbers can be activated.
Key functions
· : Change parameters.
· For Date/Time function: changes between hours, minutes, day, month and year.
· For Displ. seq function: changes between parameter and unit of measurement (only available if
there are several units of measurement for the selected parameter).
·OK for Displ. seq function and a flashing position number: confirms setting and moves to next display
position.
·OK for Displ. seq and Finish flashing: confirms settings and leaves the function.
·OK for Date/Time, Language, and Printer: functions: confirms setting and leaves the function.
·esc: leaves the parameter or function without applying the changes.
Example: "Change display position"
✓The position number to be changed has been selected.
1 Press / several times until the required parameter flashes.
2 Press the or function key to go to the menu for selecting the unit of measurement.
3 Press / several times until the required unit of measurement flashes.
4 Press the OK function key to confirm the setting and move to the next display position.
5 At the end of performing the settings: Press / several times until Finish flashes
(appears after the last position number) and confirm entry with OK.

Using the product12
Using the product
Preparing for measurement
Connecting probes/sensors
The instrument needs to detect which probes or sensors are connected, before
switch on. If you fail to do this simply turn off instrument connect probe and
re-start unit.
➣Connecting the probes:
❯Insert the connector into the flue gas
socket and lock by turning it clockwise
gently (bayonet lock).
There must be no more than one extension
lead (0554 1201) between the measuring
instrument and the flue gas probe.
➣Connecting the sensor:
If no ambient air temperature sensor is connected, the temperature
measured by the thermocouple of the flue gas probe during the zeroing
phase is used as the ambient air temperature. All dependent parameters
are calculated using this value. This method of measuring ambient air
temperature is sufficient for systems dependent on ambient air. However,
ensure that the flue gas probe is near the intake duct of the burner during
the zeroing phase.
If an ambient air temperature sensor is connected, the ambient air
temperature is measured continuously by this sensor.
❯Insert the connector of the sensor into the sensor socket.
Using the flue gas probe
➣Checking the thermocouple:
The thermocouple of the flue gas probe must not lie against the probe cage.
❯Check before use. Bend the thermocouple
back if necessary.

Using the product 13
➣Aligning the flue gas probe:
The flue gas must be able to flow freely past the thermocouple.
❯Align the probe by turning it as required.
The tip of the probe must be in the centre of the flue gas flow.
❯Align the flue gas probe in the flue gas duct
so that the tip is in the centre of the flow
(area of the highest flue gas temperature).
Activating the required functions
➣Switching the instrument on:
❯Press .
➣Activating fuel:
1Press .
2Select Fuel using / and confirm entry with the OK function key.
3Select the fuel to be measured using / and confirm entry with the
OK function key.
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Using the product14
➣Activating measuring function:
1Press .
2Select Measure using / and confirm entry with the OK function key.
3Select the required measuring function using / and confirm entry with
the OK function key.
Functions
1. Flue gas: flue gas measurement with flue gas probe and central measurement menu for
displaying/printing out all readings obtained from the various measuring functions.
2. Let by: timed measurement of differential pressure with differential pressure set (accessory).
3. tightness: timed measurement of differential pressure with differential pressure set (accessory).
4. Draught: flue draught measurement with flue gas probe and differential pressure measurement with
gas pressure set (accessory).
5. Smoke/Oild: enter smoke number/oil derivative (only available if a liquid fuel has been activated).
6. HCT: enter the heat carrier temperature.
7. Diff-press: measurement of differential pressure with differential pressure set (accessory).
8. Diff-temp: measurement of differential temperature with differential temperature set (accessory).
9. Ambient CO: timed measurement of ambient CO with flue gas probe.
Flue gas function: When the measuring cells are first called up after the
measuring instrument is switched on, they are zeroed (length of time: 30 s).
Exception: the Ambient CO function has already been started.
During the zeroing phase, the fuel can be selected. Any connected probe
must be in the open air during the zeroing phase!
Performing the measurement
➣Measuring:
✓The steps described in the chapter Preparing for measurement have
been completed.
Let by and tightness function: The Diff Press Kit (0554 1203) must be
connected.
Warning! Risk of explosion due to dangerous mixture of gases!
❯Make sure there are no leaks between the sampling point and the
measuring instrument.
❯Do not smoke or use naked flames during measurement.
Draught function: The pressure sensors are zeroed when the Draught
function is started (length of time: 5 s). The measuring instrument must
not be pressurised during zeroing!
To help position the flue gas probe in the centre of the flow (area of the

Using the product 15
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highest flue gas temperature), the flue gas temperature measured is
shown graphically.
Do not measure for longer than 5 minutes, as the readings may fall
outside of the tolerances due to a possible drift of the pressure sensor.
Smoke/Oild function: Only available if a liquid fuel has been activated.
Diff-temp. function: The differential temperature set (0554 1208)
must be connected. The ambient air sensor must be unplugged (located
bottom left of unit) before connecting the T1 sensor. Be aware that the
connector is a firm fit, when disconnecting.
The differential temperature is calculated from T1 - T2.
Diff-press function: The gas pressure set (0554 1203) must be connected.
The pressure sensors are zeroed when the Diff.-press function is started
(length of time: 5 s). The measuring instrument must not be pressurised
during zeroing!
Do not measure for longer than 5 min, as a drift of the pressure sensor
may result in readings outside the tolerance limits.
Ambient CO: When the measuring cells are first started after the measuring
instrument is switched on, they are zeroed (length of time: 30 s).
Exception: The Flue gas function has already been called up.
Any connected probe must be in the open air during the zeroing phase!
The measurement values from the functions Draught, Diff.-temp.,Diff.-press
and Smoke/Oild are transferred to the the central measurement menu Flue
gas and must therefore be carried out before the flue gas measurement.
Flue gas function:
1Start the measurement with the Start function key.
- The current readings are displayed.
Ensure flue is at normal operating temperature and the readings are steady,
before accepting flue gas measurements.
2Stop the measurement with the Stop function key.
Let by and tightness function:
- The time value is blinking.
1Set measuring time (from 1 to 15 minutes) using / and confirm with
the Start function key.
- The message Zeroing without operating pressure is displayed.
- After zeroing, the message Attach to the system and start is displayed.

Using the product16
2Start the measurement with the Start function key only when the required
gas pressure of 10mbar (Let by) or 20mbar (tightness) is displayed.
- p1 displays the start pressure in mbar, p2 displays the actual value in
mbar.
3After measuring time, the pressure difference is displayed (p2 - p1 on let
by test, p2 - p1 on tightness test).
Option:
Stop the measurement with the Stop function key.
Draught, Diff.-temp., and Diff.-press functions:
1Start the measurement with the Start function key.
- The current readings are displayed.
2Stop the measurement with the Stop function key.
3Transfer the readings to the central Flue gas measurement menu using the
OK function key.
Smoke/Oild and HCT functions:
Recording values with the smoke pump and manual input:
1Select the value to be changed using / and confirm with the change
function key.
2Set the value using / and confirm entry with the OK function key.
3Once all values have been input, select Finish using / .
4Transfer the readings to the central Flue gas measurement menu using the
OK function key.
The values entered are not shown in the central Flue gas measurement
menu. However, they can be printed out together with the readings from
other functions.
Recording values with the smoke tester testo 308 and wireless transfer:
- The testo 308 must be in data transfer mode ( lights up).
1Press function key t308 .
- The values recorded by the smoke tester are transferred.
2Once all values have been input, select Finish using / .
3Transfer the readings to the central Flue gas measurement menu using the
OK function key.
The values entered are not shown in the central Flue gas measurement
menu. However, they can be printed out together with the readings from
other functions.

Using the product 17
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Ambient CO function:
- The time value is blinking.
1Set measuring time (from 1 to 30 minutes) using / .
2Start the measurement with the Start function key.
- The following values are displayed:
AmbCO: current ambient CO value in ppm.
aver.:average ambient CO value in ppm. Every minute the average
value is calculated. If the measured value is lower than the min value,
the min value will be set to the current value. If the measured value is
higher than the max value, the max value will be set to the current
value.
min: minimum ambient CO value in ppm.
max: maximum ambient CO value in ppm.
- Alarmlevels:
Current value > 10 ppm: The value blinks (1 sec on / 1 sec off).
Current value > 30 ppm: The value blinks (0.5 sec on / 0.5 sec off).
- After measuring time the average ambient CO value is displayed.
Option:
Stop the measurement with the Stop function key.
➣Printing readings:
In order to be able to transfer data to a report printer via the infrared or
Bluetooth interface, the printer must be activated.
❯(Settings →Printer →Select printer)
The printer 0554 0543 can only be selected when the Bluetooth
interface is activated.(Option testo 327-2)
❯(Settings →Bluetooth →on/off)
The Print function key is only available if a printout is possible in the
instrument's current status.
❯Start the printout with the Print function key.
- Printing out from Flue gas function: All readings taken since the
instrument was last switched on and transferred to the central Flue
gas measurement menu are printed out.
Printing out from other functions: Only those readings taken using the
respective measuring function are printed.

Using the product18
➣Saving readings (327-2 only):
The Save function key is only available if saving is possible in the
instrument's current status.
❯Start saving with the Save function key.
➣Printing/deleting/displaying measurement data (327-2 only):
There are 20 memory locations (Position 1 to Position 20) to which one
measurement data record can be saved per location. Memory locations
that have already been assigned are indicated by the display of the
date/time of saving.
1Press .
2Select Memory using / .
- The memory capacity and available memory locations are displayed.
❯To print the memory: press the Print function key.
❯To delete the whole memory: press the Del function key and confirm entry
with the Yes function key.
3Press OK.
4Select memory location using / .
❯To display the measurement data record: press the Value function key.
❯To print the measurement data record: press the Print function key.
❯To delete the measurement data record: press the Del function.
➣Transfer data to a Pocket PC (327-2 only):
Data can be transferred to a Pocket PC via infrared or Bluetooth.
You must also refer to the documentation that comes with the software.
It is not possible to transfer data to a Pocket PC and simultaneously print.
For Bluetooth transfer, the Bluetooth interface must be activated first.
Checking the instrument
➣Performing an instrument diagnosis:
1Press .
2Select Diagnosis using / and confirm entry with the OK function key.
3Select the required function using / and confirm entry with the OK
function key.

Maintaining the product 19
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Functions
1. Info: displays instrument information: serial number, instrument temperature, operating hours, qA
version, last service
2. Error: displays list of errors.
3. Rech. batt: displays the battery capacity.
4. Sens. Diag (327-2 only): performs sensor diagnosis.
Key functions for Sens. Diag function (327-2 only)
· : select sensor.
·Read: performs sensor diagnosis and displays results of diagnosis.
Maintaining the product
Condensate trap
The fill level of the condensate trap can be read from the markings on the
condensate trap.
➣Emptying the condensate trap
Flue Gas condensate consists of a weak mix of acids. Avoid contact with the
skin. Make sure that the condensate does not run over the housing.
Caution! Failure to empty the condensate trap when the fill level is
reached results in condensate entering the sensors and pump. This
voids the warranty and results in costly repairs and replacements.
❯Do not empty the condensate trap while the flue gas pump is in operation!
1Keep measuring instrument in an upright
position (condensate outlet pointing upwards).
2Open the condensate outlet on the
condensate trap: pull out approx. 7 mm to
the stop.
3Let the condensate run out into a sink.
4Mop up any remaining drops on the
condensate outlet using a cloth.
5Close the condensate outlet.
The condensate outlet must be completely
closed, otherwise measuring errors could occur if external air gets in. It is
advisable to empty water trap at regular intervals, (preferably daily).

Maintaining the product20
Particle filter
➣Checking the particle filter:
❯Check the particle filter of the flue gas
probe for contamination at regular intervals:
check visually by looking through the
window of the filter chamber. Replace the
filter if there are signs of contamination.
➣Replacing the particle filter:
The filter chamber may contain condensate.
1Open the filter chamber by turning it gently
anticlockwise.
2Remove spent filter and fit new filter
(0554 3385).
3Fit the filter chamber and lock it by turning
it gently clockwise.
Housing
➢Cleaning the housing:
❯Clean the housing with a damp cloth (soap suds) if it is dirty. Do not use
aggressive cleaning agents or solvents!
Rech. batt.
➣Rechargeable battery care:
❯If possible, always discharge the rechargeable battery fully before
recharging it.
❯Do not store the rechargeable battery for long periods when discharged.
The best storage conditions are at 50 - 80 % charge level and 10 - 20 °C
ambient temperature; charge fully before further use.