45
Maintenance
Calibrating the Device
Calibration may not be possible due to device and channel errors.
Allow the sensors to warm up before the calibration!
Warm-up time: see Instructions for Use/data sheets of the installed DrägerSensors (at
www.draeger.com).
Calibration interval:
Observe the relevant specifications in the Instructions for Use/data sheets of the
DrägerSensors installed.
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 the channels
after 6 months.
Improve the zero point accuracy – carry out the fresh air calibration, page 46.
Set the sensitivity of all sensors to the value of the test gas – carry out the 1-button
calibration, page 47.
Set the sensitivity of a sensor to the value of the test gas – calibrate the sensitivity,
page 50.
NOTICE
Dräger recommends using the extended bump test for cross calibrations (Dräger X-
dock technical manual).
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 vapors – 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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