User Manual

6 Using the product
43
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6.1.3.2. Sensor protection
Protection limits can be set to protect the sensors against overload.
Sensor protection switch-off is available for the CO sensor.
Sensor protection is activated if the threshold is exceeded.
To disable sensor protection, the threshold values must be set to 0
ppm.
Call up function:
> [ ] → Sensor settings → Sensor protection → [OK].
Setting sensor protection thresholds:
1. Select parameter: [Edit].
2. Set value → [OK].
3. Save changes: [Finished].
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6.1.3.3. Recalibration/adjustment
The CO sensor can be recalibrated and adjusted.
For recalibration/adjustment, Testo recommends using calibration
adapter 0554 1205 or sending the instrument off to Testo Customer
Service.
If obviously unrealistic measured values are displayed, the
sensors should be checked (calibrated) and, if required,
adjusted.
Adjustments made with low gas concentrations can lead to
accuracy deviations in the upper measuring ranges.
Call up function:
> [ ] → Sensor settings → Recalibration → [OK].
Possibly:
> Enter the password: [Enter] → Enter password → [Next] →
[OK].
- Gas zeroing (30 s).
Performing recalibration/adjustment:
WARNING
Dangerous gases
Danger of poisoning!
> Observe safety regulations/accident prevention regulations
when handling test gas.
> Use test gases in well ventilated rooms only.