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imc C-SERIES - Manual, Version 4 R 3 - 2018-10-19

119CS-7008-FD, CL-7016-FD

There is a voltage drop across the resistances of the leadwires and the internal measuring resistance

of 120 Ω which is proportional to the amperage. This lost voltage is no longer available for the supply

of the transducer (2.4 V = 120 Ω * 20 mA). For this reason, you must ensure that the resulting supply

voltage is sufficient. It may be necessary to select a leadwire with a large enough cross-section.

For the former C-70xx: If the amplifier is equipped with a 350 Ω quarter bridge completion, ground

referenced current measurement is not possible! Thus this operation is not possible, too.

5.8.4 Temperature measurement

The amplifier channels are designed for direct measurement with thermocouples and PT100-sensors.

Any combinations of the two sensor types can be connected.

Note

A temperature measurement is a voltage measurement whose measured values are converted to

physical temperature values by reference to a characteristic curve. The characteristic curve is selected

from the base page of the imc Software configuration dialog. Amplifiers which enable bridge

measurement, must first be set to Voltage mode (DC), in order for the temperature characteristic

curves to be available on the base page.

5.8.4.1 Thermocouple measurement

The cold junction compensation necessary for thermocouple measurement is built-in. In the imc

connector ACC/DSUBM-UNI2, the cold junction is located directly under the clamp terminal strip and is

measured automatically.

Note

In the imc software user interface, the option isolated thermocouple (default setting) must be

activated under Settings - Configuration - Amplifier. This only is available with Coupling DC.

For former version C-70xx: When using thermocouples, the ICP-supply is no longer available.

A description of the available thermocouples .

IMC C SERIES User Manual

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