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Adjustments made with low gas concentrations can lead to
accuracy deviations in the upper measuring ranges.
The sensor protection (shut-down function) is not
deactivated. The test gas concentration should therefore be
lower than the set thresholds for the sensor protection.
The function of to dilute all (x5) is automatically
deactivated.
If the instrument is fitted with an CxHy sensor, it should be
switched off before test gas is applied.
If a CxHy-Sensor is fitted, switch this off before measuring
test gases with O
2
contents <2%. If you forget to do this,
the sensor will switch off automatically during the
measuring process, but will still be strained unnecessarily.
The following boundary conditions must be met when calibrating /
adjusting:
• Use absorption-free hose material.
• Select Test Gas as fuel
• Switch on the flue gas analyzer at least 20 minutes before
calibration/adjustment (to warm up)
• Use clean air for gas zeroing
• Maximum overpressure of the test gas 12.04 "H
2
O
(recommended: pressureless via bypass)
• Apply the test gas for at least 3 minutes
Recommended test gas concentrations and compositions can be
found in the Test Gas Manual (Order-No. 0981 2313) or in the
Download Center.
Activating the function:
Make sure that the ambient air us free of interfering gases
(i.e. CO, NO, etc.) during zeroing!
> [ ] → Sensor settings → [OK] → Recalibration → [OK].
Possibly:
> Enter the password: [Enter] → Enter password → [Next] →
[OK].
- Gas zeroing (30s).
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