H59.0.22.6C-06
page 6 of 8
9
Calibration
In order to compensate for ageing of the sensor and air pressure fluctuations due
to weather changes, the sensor has to be calibrated at regular intervals. The
sensor will be calibrated to the atmospheric oxygen concentration of 20.95%.
We recommend to calibrate directly before starting the measuring process.
Calibration:
.
The sensor has to be subjected to air (make sure that rooms are
thoroughly aired).
Press the
key for 2 sec till
appears.
The calibration will be automatically completed as soon as the measuring value is
stable (takes a few seconds). Afterwards the rating of the sensor state will be
shown for a short time.
If an error message (CE.3, CE.4, CE.6) is displayed, the sensor signal is
invalid. Press any key to restart, the previous calibration will be restored.
The display is blinking afterwards until a valid calibration is performed.
10 Sensor rating
The rating of the sensor state is calculated and saved after successful calibration.
Watch sensor rating:
Press shortly the
key, the display shows for a short
time i.e.
= 100%.
The rating is displayed in 10 percent steps: 100% = optimal sensor status. Lower values are
indicating that the sensor life time will soon be reached. (50% doesn’t mean 50% of the life
time, but 50% of the reference signal!). Erroneous P.AbS entries may cause to low ratings
.
11 Errors and system messages
no
display
The battery is used up and has to be exchanged, or the device is defective
blinking
display
The last calibration was not successful. A new calibration has to be performed!
The battery is used up, for a short period further measurements are possible
The battery is used up and has to be replaced, measurements are no more
possible
Calibration error: sensor voltage is too low (sensor used up or wrong chosen air
pressure)
Calibration error: sensor voltage is too high (wrong chosen air pressure or
sensor defective (membrane crack, etc.)
Calibration error: signal not stable
Measuring error: range has been exceeded
Measuring error: measuring value has fallen below permitted range
System error: the device is defective or considerably out of the allowed ambient
temperature range
Value could not be calculated (e.g. input of MOD-calculation is error)
