Calibration; Test Gases - Dräger X-node Technisches Handbuch

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Calibration

The update will take approx. 2 minutes.
The process may take longer when reaching the limits of the
Bluetooth range or in a very busy 2.4 GHz band.
68
If the update process is interrupted, the previous firmware will be
started again.
Once the firmware has been successfully updated, the X-node is
restarted (status LED flashes green, red, blue). The "Firmware" menu
now displays the new version of the installed firmware.
Following an update, the sensor must warm up again before it can
deliver stable readings.
6 Calibration
During calibration, the measurement accuracy of the sensor is
monitored and adjusted with a known test gas concentration. First,
the zero point and then the sensitivity of the sensor is calibrated. The
duration of the calibration intervals depends on the respective
regional or operational standard requirements.
In order to ensure proper operation, never set the sensitivity before
the zero point has been set. If these processes are carried out in the
wrong order, the calibration will be incorrect.
WARNING
Incorrect calibration
An incorrect calibration can lead to inaccurate measured values.
► After changing the sensor, check all settings and parameters.
► Test a newly installed sensor with target gas in order to ensure it is
operating correctly.
6.1

Test gases

Test gas properties (e.g. relative humidity, concentration) can be
found in the corresponding sensor data sheet. Depending on the type
of calibration, various test gases are used.
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Dräger X-node