5. Commissioning and operation
Resistance thermometer
1 x Pt100, 2-wire
EN
white
2 x Pt100, 2-wire
black
white
Thermocouple
Marking of the polarity
Single thermocouple
Dual thermocouple
20
1 x Pt100, 3-wire
red
white
red
white
2 x Pt100, 3-wire
black
yellow
red
white
red
white
black
yellow
The colour coding at the positive poles of the instrument
decides the correlation of polarity and terminal
WIKA operating instructions, models TR10-L, TC10-L, TR10-0, TC10-0 (Ex d)
1 x Pt100, 4-wire
red
white
red
white
red
red
white
2 x Pt100, 4-wire
black
yellow
white
red
red
red
white
black
black
yellow
red
red
red
red
white
white
yellow
red
red
red
white
white
black
black
yellow
yellow