Calibrating the gas detector
9
en
5.3
Carrying out a manual span calibration
Prepare the test gas cylinder, connect the test gas cylinder
to the calibration adapter and connect the calibration
adapter to the gas detector.
1. Open the maintenance menu, see Section 5.1 on Page 8.
2. Press the [OK] button while the span calibration symbol is
flashing. The configured test gas concentration is
displayed. The test gas concentration can be used or
adjusted according to the concentration in the test gas
cylinder.
3. Press the [
▼
] button to change the configured test gas
concentration. The first position flashed. Press the [
▼
]
button to change the value of the flashing position. Press
the [OK] button to confirm the value. Repeat this procedure
to define the next three values. After the last confirmation
with the [OK] button, the test gas concentration is
complete.
4. Open the test gas cylinder valve to let test gas flow over the
sensor (flow: 0.5 L/min).
5. Wait until the displayed measured value is stable (after at
least 120 seconds).
6. Press the [OK] button to start the span calibration. The
concentration display flashes.
7. As soon as the measured value displays a stable
concentration, press the [OK] button to confirm the span
calibration or the [
▼
] button to cancel the span calibration.
Span calibration passed: A short double tone sounds, and
OK / gas name
is shown in an alternating display. Press
the [OK] button to return to measuring mode.
Span calibration failed: A tone sounds.
– – –
is displayed instead of the measured value. The error
symbol and the span calibration symbol are displayed. In
this case, repeat the span calibration.
To test the measured value configuration times, allow t90
test gas to flow over the calibration adapter on the gas
detector. Check the results in accordance with the
information in the table (see the supplementary
documentation, order no. 90 33 741) up to a reading of
90 % of the final display.
For Pac 8500, the span calibration is carried out
consecutively for the various gasses.
5.4
Carrying out manual calibration with the
Dräger CC-Vision Basic
To calibrate the gas detector using the Dräger CC-Vision Basic
PC software:
1. Connect the gas detector to a PC using the communication
module.
2. The calibration can be carried out using the Dräger
CC-Vision Basic PC software. For further information, see
the Dräger CC-Vision Basic online help.
A calibration interval can be set using the “Configurable
operating time” (in days) feature, see Section 7.1 on
Page 13.
5.5
Carrying out an automatic calibration
with the Dräger X-dock
The gas detector can be automatically calibrated using the
Dräger X-dock, see the Dräger X-dock instructions for use.
