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

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MULTITOX DETECTOR
OPERATING MANUAL
50 NOSP17668
Revision 03
a
We recommend to use a mixture of the target gas with a 50% of the measuring
range concentration. The complement of the mixture should, preferably, be Air
(this is imperative for the DM-TT6-S version).
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 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
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