Despatch P1400+ Temperature Controller - Manual (Page 22)

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WARNING:
CHECK THE INFORMATION LABEL ON THE CASE TO DETERMINE THE CORRECT VOLTAGE
BEFORE CONNECTING TO A LIVE SUPPLY.
4.11 Universal Input Connections - Thermocouple (T/C)
Use only the correct thermocouple wire or compensating cable from the probe to the instrument
terminals avoiding joints in the cable if possible. Failure to use the correct wire type will lead to
inaccurate readings. Ensure correct polarity of the wires by cross-referencing the colours with a
thermocouple reference table .
Figure 12. Thermocouple Input Connections
4.12 Universal Input Connections – PT100 (RTD) input
For three wire RTDs, connect the resistive leg and the common legs of the RTD as illustrated. For a
two wire RTD a wire link should be used in place of the third wire (shown by dotted line). Two wire
RTDs should only be used when the leads are less than 3 metres long. Avoid cable joints.
Figure 13. RTD Input Connections
Four wire RTDs can be used, provided that the fourth wire is left unconnected. This wire should be
cut short or tied back so that it cannot contact any of the terminals on the rear of the instrument.
RTD
3
2
1
3
2
+
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