Filter For Co, H2-Comp., No Exchanging Sensors - TESTO 340 Instruction Manual

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After replacing an O2 sensor, wait 15 min before using the instrument again (Pro-
duction of supply voltage and initial stabilization phase for new sensors).
If retrofitting a sensor you must activate the relevant measuring parameter and unit,
see Display edit, p. 27.
I.3 Filter for CO, H2-comp., NO exch-
anging sensors
The measuring instrument must be switched off and the mains unit disconnected from
the mains supply.
1 Place measuring instrument on its face.
2 Loosen screws with a screwdriver, release clip in the direction of the arrow, and
remove service cover.
3 Remove hose connections from sensor.
4 Remove sensor from slot.
10 Reset ppm hour counter (see Display ppm/hour counter, p. 33.
Do not remove auxiliary circuit boards of the new
sensors until immediately before installation. Do not
leave the sensors without a auxiliary circuit boards
for longer than 15 min.
NO/NO sensors:
low
Remove the auxiliary circuit board.
5 Insert a new sensor/bridge in the slot.
6 Attach tube connections to the sensor/bridge.
7 Replace and close service cover (clip must click
in), fix with screws.
8. Turn on a device.
5 Remove spent filter from sensor.
6 Place new filter on sensor.
Avoid touching the electronics of the sensor.
Observe the markings on the filter and the sensor
7 Insert sensor into slot.
8 Replace hose connections on to sensor.
9 Replace and close service cover (clip must click
in), fix with screws.