EN
14347811.01 07/2019 EN/DE
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WIKA operating instructions model TGT73 (Ex)
Faults
Causes
Measures
No output signal
No supply voltage or cable
break
Check voltage supply
and cables. Replace any
defective components found
Transmitter incorrectly
connected
Check connections; correct
connections if necessary
Electronics failure due to
too high supply voltage or
through external voltage
Return the measuring
instrument to the
manufacturer for repair
Constant
output signal
upon change in
temperature
Supply voltage connected
the wrong way
(I = approx. 4.5 mA)
Check connection, and if
necessary, swap terminals
1 and 2
Transmitter defective
Return the measuring
instrument to the
manufacturer for repair
Too high, constant
output signal
upon change in
temperature
Electronics failure due to
too high supply voltage or
through external voltage
Return the measuring
instrument to the
manufacturer for repair
Signal span too
small
Supply voltage too low
Rectify the supply voltage
Load too high
stay within the max.
permissible load
For the replacement of the instrument, observe chapters 9
“Dismounting, return and disposal” and 5 “Commissioning, operation”.
8. Maintenance and cleaning
8.1 Maintenance
The instruments are maintenance-free.
The indicator and switching function should be checked once or twice
every year. For this the instrument must be disconnected from the
process to check with a pressure testing device.
7. Faults / 8. Maintenance and cleaning
