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

After replacing an O2 sensor, wait 60 min before using the instrument again.
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
exchanging 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.
I.4

Recalibrating sensors

See Sensor settings , p. 31.
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.
10 Reset ppm hour counter (see Display ppm/hour
counter , p. 33.
I. Care and maintanance 47