Setting sensor protection:
Protection limits can be set to protect the measuring cells against overload. The sensor
protection is activated if the threshold is exceeded:
· testo 330-1 / testo 330-1LL: Switch-off
· testo 330-2, -3 / testo 330-2LL: Dilution, if exceeded again: Switch-off
If the threshold is set to 0ppm, the sensor protection is deactivated.
1
Sensor protection
.
2 Select the parameter.
3
Set the values
.
4 Repeat steps 2 and 3 for the other parameters in the same way.
Saving settings:
OK Save input
.
Recalibration:
CO and NO measuring cells can be recalibrated. A calibration adapter (0554 1205) must
be connected.
If obviously unrealistic readings are displayed, the measuring cells should be checked
and recalibrated as required.
Have the check/recalibration carried out by a Testo qualified service centre.
Dangerous gases
Danger oof ppoisoning!
Observe safety regulations/accident prevention regulations when
handling test gases.
Use test gases in well ventilated rooms only.
Recalibration with low gas concentrations can lead to fluctuations in accuracy in the
upper measuring ranges.
1 Connect the calibration adapter to the flue gas socket.
2
Recalibration
.
- Gas zeroing (30 s).
3 Select the parameter
Enter the test gas concentration (required value).
4 Attach the connecting cable of the test gas bottle to the calibration adapter.
5 Charge the measuring cell with test gas.
6 Start calibration:
.
7 Accept the actual value as soon as the required value is stable:
.
OK
Start
Change
OK
OK
OK
Change
OK
F. Configuration
F.2 Sensor settings
31
