6 Commissioning / Shutdown
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6.4.2 Offset calibration of both sensors with compressed air
Uring offset calibration compressed air air the
• O
2
value will be calibrated to 21%
• U-COe voltage will be calibrated to “0”
NOTE:
Offset calibration on ambient air only works with O2 values > 18%.
For offset calibration, compressed air with a pre-pressure of 0,3bar must be connected
to the “Test gas” hose connection on the PCB.
Menu function
When you press the [cal] menu key, “Start calibration” appears in the display. After
you have activated calibration:
• Open the shut-off plug valve in the PCB
• Set the pressure rise “dp” to 2...3mbar via the test gas throttle in the PCB
• Start calibration
• Following successful calibration, close the shut-off plug valve
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