TESTO 340 Instruction Manual page 33

Display ppm/hour counter (active only when sensors with exchangeable fi lters are
used):
For those sensors which have an exchangeable chemical fi lter for neutralizing cross-ga-
ses, a ppm/hour counter is available.
this applies to:
CO, H2 comp. sensor (fi lter life approx. 170000 ppmh)
NO sensor (fi lter life approx. 120000 ppmh)
1
ppm/hour counter

2 Select sensors.
Options:
Switch between the individual sensors:
Display of max. fi lter life and current hour counter value
When maximum fi lter life is reached, information is displayed:
Please exchange filter
Reset hour counter of a sensor:
Displaying actual calibration data/sensor status:
Calibrationdata

Options:
To change between the actual calibration data of the individual sensors:
To print out the actual calibration data of all sensors:
To display the status of the sensor as a graphic:
- The status of the sensor is checked on every recalibration. Any deviation from
the condition on delivery is indicated as a percentage.
70%-threshhold: "Gas cell reading unstable, replace item recommended.",
50%-threshhold: "Replacement sensor."
The last 25 recalibrations are shown.
To return to the display of the actual calibration data:
Recalibration:
CO, H2-comp, SO2, NO2, NO sensors and the O2 reference value can be recalibrated.
Measurement gas dilution in slot 2 can be recalibrated.
If obviously unrealistic readings are displayed, the sensors should be checked and reca-
librated as required.
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OK
.
back
.
OK
Testo-Direct
www.
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Print
Graphic .
Value
Filter material spent.
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1.800.561.818
.ca
33