Cold Junction Compensation

At a Glance

This function is available on input modules. It may be internal or external. By default, internal compensation is suggested to the user.

NOTE: If you select external compensation, channel 0 of the module is forced – upon confirmation – to adopt the Pt100 range.

TSX AEY 414 Module

The following table provides a step-by-step procedure for modifying the Cold Junction Compensation behavior for the TSX AEY 414 module.

Step	Action
1	Access the hardware configuration screen for the appropriate module.
2	Check the Internal by TELEFAST or External by Pt100 box in the Cold Junction field.
3	Validate the change with Edit → Validate.

TSX AEY 1614 Module

The following table provides a step-by-step procedure for modifying the Cold Junction Compensation behavior for the TSX AEY 1614 module.

Step	Action
1	Access the hardware configuration screen for the appropriate module.
2	Check the Internal by TELEFAST or External by Pt100 box in the Cold Junction field, in the General Parameters area. These two check boxes determine the type of cold junction compensation : Internal by TELEFAST (default): Compensation is performed at the level of the Telefast terminal block. In this case it is possible to raise the cold junction temperature value through Channel 8, by checking the Read Cold Junction box, and after acknowledging the warning message, external, through a PT100 probe that needs to be wired on Channels 0 and 8. Channel 0 flows the current in the probe, and Channel 8 measures the temperature.
3	Validate the change with Edit → Validate.