en | Maintenance
60 X-am
®
2800 / X-am
®
5800
The determined t90 setting time may differ from the certified setting time,
as this simplified procedure does not conform to the standard.
The X-dock maintenance station provides the option of automatically
checking the response time.
5.6 Calibrate the gas detector
5.6.1 Notes on calibration
WARNING
Incorrect measured values
Incorrect calibration means that alarms may not be triggered or only with a
delay.
► Always carry out the clean air/zero calibration prior to the span calibration.
If the measured or calibration gas is changed, the affected channel must be
calibrated.
X-am 5800: An active H2 added signal will be automatically deactivated
temporarily for the duration of a manual calibration, a PC calibration or an
automatic bump test.
5.6.2 Performing a fresh air calibration
Observe the following instructions for fresh air calibration:
● To improve accuracy, a fresh air calibration must be carried out if a zero
deviation exists.
● For the fresh air calibration, the display on the DrägerSensor XXS O
2 and
XXS O
2 PR is set to 20.9 Vol%.
The fresh air calibration is not supported by the CO2 channel of the infrared
sensor and XXS O
3. A zero calibration of these sensors can be undertaken by
performing a single-gas calibration with N
2 or using the Dräger CC-Vision PC
software. A suitable zero gas is required here, one that is free from carbon
dioxide and ozone (e.g. N2).
Prerequisites
– The fresh air calibration can only be carried out if at least one sensor
supports fresh air calibration.
– The fresh air must be free of measured or interfering gases.
– The gas detector is switched on and warm-up phases 1 and 2 are complete.
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