WIKA TR - Commissioning and Operation; Electrical Connection

WIKA Operating Instructions RTDs and Thermocouples
11208287.03 06/2010 GB/D/F/E
11
GB
6. Commissioning, operation
WARNING!
When the thermometer is mounted, the temperature must not drop below the allowed
operating temperature (environment, medium) or exceed it, even when taking convec-
tion and heat radiation into account!
WARNING!
Thermometers must be earthed if dangerous voltages could be expected at the
connection wires (caused, for example, by mechanical damage, electrostatic
discharge or induction)!
6.1 Electrical connection
CAUTION!
■
Damage to cables and wires, and to connection points must be avoided
■
Flying leads with bare ends must be nished with ferrule ends (cable preparation)
■
Both the internal capacitance and inductance must be considered
The electrical connection is to be made according to the sensor connections/pin assignments
shown below:
Thermocouples with terminal block
6. Commissioning, operation
Single thermocouple
Dual thermocouple
The colour coding at
the positive connection
to the devices always
decides the correlation
of polarity and
connection terminal.