Carrying Out The Fresh Air Calibration - Dräger X-AM 5000 Technical Manual

Maintenance

Carrying out the fresh air calibration

To improve the zero point accuracy, you can carry out a fresh air calibration.
If none of the sensors fitted permits calibration with fresh air (e.g. only O
CO ), fresh air calibration is not offered as a menu function.
2
−
Calibrate the device to fresh air, free of measured gases or other interfering gases.
−
Not all sensors are included in the fresh air calibration
warmed up or which are faulty prevent a calibration.
In the case of sensors which are in the warm-up phase, the message » 159 « is dis-
played with the special symbol »
In the case of a sensor or device error, the message » 109 « is displayed with the
special symbol »
The message is cleared after 5 seconds and the function is available again in the
menu
−
During the fresh air calibration, the zero point of all sensors (with the exception of
DrägerSensor XXS O
In the case of DrägerSensor XXS O
• Switch on the device.
Depending on device configuration:
• Call the quick menu and select the
Fresh Air Calibration function,
page 16.
or
•
Call the calibration menu and select
the Fresh Air Calibration function,
page 17.
−
The current gas concentration values
flash.
When the measured values have sta-
bilized:
•
Press the key to perform the fresh
OK
air calibration.
1) Fresh air calibration / zero point adjustment is not supported by the DrägerSensor XXS O
point calibration / adjustment of these sensors can be conducted using the Dräger CC-Vision PC soft-
ware. To do so, a suitable zero gas that is free of ozone (e.g. N
38
NOTICE
« (for warning message).
« (for a fault message).
) is set to 0.
2
, the display is set to 20.9 vol. %.
2
, only IR-
3
1)
. Sensors which have not
ch
4
%LEL
O
2
Vol%
CO
ppm
H S
2
ppm
NH
3
ppm
) should be used.
2
. A zero
3