Operational Interruptions; Using The Dust Filter; Troubleshooting - Dräger PEX 3000 Mode D'emploi

4.5.1

Operational interruptions

In the event of operational interruptions, e.g. when performing maintenance and
inspection work, the transmitter is ready for use again approx. 10 minutes
(sensor warm-up time) after turning on the system once again.
– The transmitter must be re-calibrated, if necessary.
4.5.2

Using the dust filter

Type XTR 0000: a dust filter can be used for the DrägerSensor PR M DQ (see
order list, part number 68 10 537). This is simply pressed into the opening
before the sensor's wire mesh disc and is latching. This dust filter will effectively
have no impact on the sensor's response time and the influence on the sensor's
sensitivity is also minimal. If a dust filter is used, it must also to be used during
the calibration procedure. The dust filter should be replaced before calibration.
5

Troubleshooting

Fault Cause
Display off Cable faulty
Transmitter cannot be Sensor faulty or poi-
calibrated soned
Measuring current is Transmitter signals a
1 mA, display shows E0, fault
E1, .... or E8
Error code Cause
E0 Supply voltage is below
12 V or above 30 V.
E1 Hardware error
Dräger PEX 3000
Error code
E2
E3
E4
E5
E6
Remedy
Check cable to the con-
troller.
E7
Replace sensor (see
"Replacing the sensor",
page 42).
E8
See following table.
If it is not possible to eliminate the faults by employing the remedial measures
described, or if other faults occur, the transmitter must be checked by
specialists and repaired, if necessary.
Remedy
Correction of the supply
voltage.
Replace 4 to 20 mA con-
verter module.
Troubleshooting
Cause Remedy
Memory error, error Repeat calibration pro-
when exporting calibra- cedure. If calibration
tion information fails again: Hardware
error. Replace converter
module.
Sensor not connected or Check sensor connec-
defective tion and replace sensor,
if necessary.
Sensor signal below – Calibrate the zero-point
5 %LEL or lower than – and span.
0.9 %LEL
Error during zero cali- Check zero gas and
bration (e.g. offset too sensor and replace sen-
high) sor, if necessary.
Error during span cali- Repeat the procedure,
bration (e.g. sensor sig- check the test gas and
nal <0.08 mV/%LEL) sensor and replace sen-
sor, if necessary.
Error while calibrating Repeat calibration,
the 4 to 20 mA output check the measurement
signal setup for errors.
System error Replace 4 to 20 mA con-
verter module.