Maintenance And Cleaning - WIKA Intelli Therm TGT73 Manual De Instrucciones

8. Electrical connection / 9. Maintenance ...
2-wire system
e.g. 4 ... 20 mA
Earth, connected
to case
Power supply
U +/Sig+
B
+0V/Sig-
Evaluation
(display)
As a power supply, an unstabilised DC power supply is sufficient, with
a max. ripple of 10 % ss in the range of the specified power supply
limits. It is important to ensure that the applied power supply is at least
greater than the maximum required voltage drop from the external
display and evaluation units; i.e. the voltage at the transmitter must
not fall below 12 V.

9. Maintenance and cleaning

9.1 Maintenance
Gas-actuated thermometers with transmitters are maintenance-free!
The indicator should be checked once or twice every year. To do this
the instrument must be disconnected from the process and checked
using a temperature calibrator.
Repairs must only be carried out by the manufacturer.
WIKA operating instructions model TGT73
Terminal box
Terminals 3, 4, 5 and 6:
only for internal use
3-wire system
e.g. 0 ... 10 V
Earth, connected
to case
Power supply
U +/Sig+
B
I /U
out out
+0V/Sig-
Evaluation
(display)
Terminals 4, 5 and 6:
only for internal use
19
GB