Dräger Polytron 8100, Instructions For Use Manual, Page: 32 / 254

32 Dräger Polytron 8100
Maintenance
6.2.3 Auto Calibration
The instrument offers the option of an automatically
sequenced calibration. This reduces the number of manual
interactions with the instrument. The auto calibration is only
suitable for experienced users, because calibration errors can
happen due to procedural mistakes.
1. Select Settings > Sensor > Auto calibration and confirm.
2. Select Enable or Disable and confirm.
3. Apply Synthetic Air or Nitrogen.
4. Select
Calibration > Auto calibration and confirm.
The Maintenance signal is transmitted and the symbol [ ]
is displayed.
5. The message Please wait... is displayed and the
instrument automatically performs the zero calibration.
6. After a successful zero calibration, the span calibration is
started.
The parameters for the calibration gas are displayed e.g.:
Depending on the sensor these parameters can be changed:
1. Select Gas and confirm.
2. Select the calibration gas from the list and confirm.
3. Select
Unit and confirm.
4. Select the unit of measurement from the list and confirm.
5. Select
Conc. and confirm.
6. Set the concentration of the calibration gas.
If the settings are correct:
1. Apply calibration gas.
2. Select
Next and confirm to start the calibration.
3. Select Back to menu to abort the calibration.
4. Once the current value is stable, the instrument
automatically performs the span calibration.
5. After a successful calibration, the new current value and
the message Value OK? are displayed.
If not, select Redo and confirm to perform the calibration
again.

If the value is OK, turn off gas flow and remove the
calibration adapter from the sensor or disconnect
tubing.

If the current value is not within the alarm range:
6. Select Accept value and confirm to finish the calibration.
The instrument returns to the calibration menu.
NOTICE
Not all of the available sensors and gases support auto
calibration. If the function is not available, a manual
calibration must be performed (see 6.1.1 on Page 30
and 6.1.2 on Page 30).
WARNING
Ambient air can be used to zero the sensor instead of
Nitrogen or Synthetic Air if the area is known to be free
of the target gas or any gas to which the sensor may
be cross-sensitive (as listed on the sensor data sheet).
In this case, no cylinder or calibration adapter is
needed for the zero calibration.
Dräger recommends performing a second,
independent measurement. Some sensors may only
be calibrated with Synthetic Air or Nitrogen (see
sensor data sheet)
Gas H2S
Unit ppm
Conc. 25
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!
NOTICE
After 15 minutes without confirmation, the instrument
reverts to the calibration menu without performing
a calibration.
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