TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-K, Operating Manual

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MULTIXPLO AND MULTITOX DETECTORS
OPERATING MANUAL
48 NOSP17665
Revision 02a
If the detector enters in ambiguity mode, a test of the zero point and a gas test are recommended.
We recommend cleaning the communication head window at the same time.
For any other operation, please contact your supplier or our technical services.
7.2.2 Corrective maintenance
If the detection unit or the PLC signals a detector’s fault, the detector must be tested directly with
the wireless communication tool to determine the type of fault.
If the detector is configured in 0-22 mA output, it is possible to have a pre-diagnostic of the fault.
7.3 List of main faults
In addition of the current loop faults, other information are available from the wireless
communication tool TLU600 (refer to § 6.6). If the detector does not work properly, the following
table can help you to determine the causes and effects of different possible troubles
.
FAULTS CAUSES SOLUTIONS
Backlight display
switched off
Power supply failure
Check the power supply (18 and 35
V
DC
) at the detection unit or the PLC
output
Continuity issue Check line continuity
No 4-20 mA / 0-22
mA signal
3-wire cabling
Power supply failure
Check the power supply (18 and 35
V
DC
) at the detection unit or the PLC
output
Continuity issue Check line continuity
No shunt between V+ and L+ Place the shunt
No 4-20 mA / 0-22
mA signal
4-wire cabling
Power supply fault Check the loop with an ammeter.
ZERO_FAULT
(Zero point fault)
Zero-point resetting
impossible
Fault memorized, even on a power
supply shut down. To acknowledge
this fault, make a full calibration (in
general, the sensor needs to be
replaced).