35
Maintenance
Calibrating / Adjusting the Device
Calibration may not be possible due to device and channel errors.
Allow the sensors to warm up before the calibration / adjustment!
Warm-up time: refer to the Instructions for Use of the installed DrägerSensors (on CD).
Calibration interval:
— Observe the relevant specifications in the Instructions for Use of the installed DrägerSen-
sors.
— For critical applications, observe the recommendations in EN 60079-29-2
1)
or
EN 45544-4
2)
and national regulations. We recommend that you calibrate all channels af-
ter 6 months.
— Improve the zero point accuracy – carry out the fresh air calibration, page 36.
— Set the sensitivity of all sensors to the value of the test gas – carry out the 1-button cali-
bration, page 38.
— Set the sensor sensitivity to a value of the test gas – calibrate/adjust the sensitivity,
page 40.
1) EN 60079-29-2 – Gas measuring device - Selection, installation, use and maintenance of apparatus
for the measurement of combustible gases or oxygen.
2) EN 45544-4 – Electrical devices for the direct detection and direct concentration measurement of toxic
gases and vapours – Part 4: Guidelines for selection, installation, use and maintenance.
CAUTION
Do not inhale the test gas. Risk to health!
Observe the hazard warnings of the relevant Safety Data Sheets.
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