GB
11258421.09
01/2012
GB/D
WIKA operating instructions temperature transmitter T32.xS
33
9.3 Sensors
9.3.1 Schematic representation, configuration
Thermocouple
Resistance thermometer/
resistance sensor
in
4-wire 3-wire 2-wire
CJC with
external Pt100
Input
Sensor 1
Sensor 2
Sensor 1
Sensor 2
9. Electrical connections
9.3.2 Resistance thermometer (RTD) and resistance sensor
It is possible to connect an RTD resistance thermometer (e.g. per
EN 60751) or any resistance sensor in a 2-, 3- or 4-wire connection
method and to connect two identical resistance thermometers, having
the same measuring ranges, in a two-wire circuit. Configure the input
of the transmitter to match with the actual method of connection used.
Otherwise you will not fully exploit the possibilities of connection lead
compensation and, as a result, possibly cause additional measuring
errors (see chapter 6.3 "Configuration").
9.3.3 Thermocouples (TC)
It is possible to connect one or two identical thermocouples. Make
sure that the thermocouple is connected with the correct polarity. If
the lead between the thermocouple and the transmitter needs to be
extended, only use thermal or compensation cable appropriate for the
connected thermocouple type.
Configure the input of the transmitter appropriately for the
thermocouple type and the cold junction compensation actually
used, otherwise measurement errors may be caused (see chapter
6.3 "Configuration").
Duplex
thermocouple
duplex mV-
Sensor
Potentio-
meter
Dual resistance
thermometer/
Dual resistance
sensor
in
2+2-wire
