Dräger VarioGard IR EX, Инструкция по эксплуатации, Страница: 34 / 43

Seite 34
Operation
The transmitter continuously monitors the concentration of potentially
explosive gas in the ambient air.
– If no fault has occurred, the display indicates the concentration of the gas
being monitored.
– The measured value is transferred to the controller (transmitter without
power supply) via the 4 to 20mA interface.
– In the case of a transmitter with power supply, signal transmission to the
controller
can only occur when an interface has been installed
(optionally available 4..20 mA interface, order no.: 8315839). Otherwise,
the measured value is
only indicated in the display.
In order to ensure problem-free measuring operation, gas access to the
transmitter must not be blocked!
Maintenance and Faults
Behavior Following Power Failure
Following a power failure, the warm-up phase is initiated again when the
power supply returns.
When the warm-up time is completed, the unit automatically switches to
normal measuring mode.
Behavior Following a Fault
When a fault occurs in the transmitter, the text “Error Code” appears in the
display.
This error code helps the Dräger Service to identify the fault and eliminate it.
Please note that the transmitter no longer displays or detects any gas
concentrations until the fault has been cleared.
If the error code appears, please contact the nearest Dräger Service
representative,
stating the error code . The telephone numbers are listed at
the end of this instruction manual.