IMC CANSAS - Temperature Measurement; Measurement with PT100 (RTD) (Type LEMO)

CI8 isolated voltage channels with current and temperature mode 281
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
6.5.3 Temperature measurement
The CI8 temperature channels are designed for direct connection of thermocouples and Pt100-sensors
(RTD, platinum-resistance thermometers). Any combination of both sensor types can be used; all
common thermocouple types are supported along with their particular characteristic curves.
-IN
+I
10
M
+IN
-I
+
-
configuration for thermocouples
configuration for two PT100 (RTD)
Note
The mode for thermocouples is also available for CI8-LEMOSA. Please note, that the cold junction
compensation must be completed externally (e.g. with ice water).
6.5.3.1 Measurement with PT100 (RTD) (Type LEMO)
With the LEMO terminals at the IP65 housing SL it's only possible to connect Pt100 sensors directly in 4-
wire-configuration. A (supplementary) reference current source feeds the sensor. How to connect a
Pt100 sensor is shown below.
Connection scheme of a PT100 sensor with LEMO terminals