39
H
2
added signal
The functionality of the H
2
added signal is only supported provided a Dräger
Sensor XXS H
2
HC is operated in conjunction with a Dräger Sensor DUAL IR Ex/CO
2
or a Dräger Sensor IR Ex sensor in the Dräger X-am 5600. Both units must be set to
LEL.
An added signal can be activated and deactivated via the Dräger CC-Vision PC
software.
If the H
2
added signal feature is activated, ch
4
+ appears in the measured value display.
By activating the H
2
added signal, the LEL gas concentration of the activated Dräger
Sensor XXS H2 HC (68 12 025) is added to the LEL gas concentration of the activated
Dräger Sensor DUAL IR Ex/CO
2
(68 11 960) or of the activated Dräger Sensor IR Ex
(68 12 180) and shown on the display at the position of the IR Ex display.
WARNING
After activating or deactivating the H
2
added signal check the set alarm thresholds.
WARNING
In the case of a manual function test the effect of the H
2
added signal must be taken
into account accordingly.
NOTICE
Maintain the set alarm thresholds as they are to ensure that in the presence of
hydrogen (H
2
) the alarm of the IR Ex Channel is triggered earlier if required.
NOTICE
A potentially activated H
2
added signal is automatically temporarily deactivated
during a manual calibration, a PC calibration or an automatic Bump Test for the
relevant duration.