Fault - Cause - Remedy - Dräger PEX 3000 Gebrauchsanweisung

Fault - Cause - Remedy

Fault - Cause - Remedy
Fault
Display off
Transmitter cannot be calibrated
Signal output is 1 mA, display shows
E0, E1, ...., or E8
Failure code
E0
E1
E2
E3
E4
E5
E6
E7
E8
Should it not be possible to eliminate the malfunctions occurring by employing the
remedial measures described, or should other faults occur:
Check transmitter and, if necessary, arrange repair by trained service personnel.
50
Cause
Cable faulty
Sensor faulty or poisoned
Transmitter is faulty
Cause
Supply voltage is below 12 V DC or
above 30 V DC.
Hardware failure
Storage failure, failure while reading the
calibration information
Sensor not connected or defective
Sensor signal lower than –5 %LEL or
lower than –0.9 %LEL
Failure during zero adjustment (e.g. if
the offset is too high)
Failure during sensitivity adjustment
(e.g. if the sensor signal is lower than
0.08 mV/%LEL)
Failure while adjusting the 4 to 20 mA-
output current
System failure
Remedy
Check cable to central controller.
Replace sensor, page 49.
See following table.
Remedy
Connect transmitter to proper voltage.
Replace 4 to 20 mA-Converter module.
Repeat calibration procedure. If failure
repeatedly occurs: Hardware failure.
Replace converter module.
Check sensor connection and if needed
replace sensor.
Adjust zero and sensitivity.
Check zero gas and sensor or replace
sensor.
Repeat sensitivity adjustment, check
test gas concentration or replace
sensor.
Repeat procedure, check electrical
installation.
Replace 4 to 20 mA-Converter module.