SKF Multilog On-Line System IMx-M User Manual page 176

Protection
Protection Module Configuration with IMx-M Manager
2 - 156
Figure 2 - 122.
Entering the Slave Channel Acquisition Values.
After the slave channel has been configured, the combined measurement can
either be configured by pressing the OK button and selecting the new
measurement from the "Combined Measurements" configuration branch, or by
instead pressing the "Combined Meas 1 (Ch1/Ch2)" button (see figure above).
This will save the current channel settings and then launch a new "Combined
Measurement" dialog.
Configuring a CDE Combined Measurement Channel
To complete the process of creating a Complementary differential expansion
measurement, we need to configure a new combined measurement (consisting
of both channel 1 and channel 2).
Once the combined measurement dialogue is opened, first we need to set the
actual Type to "Complementary Differential Expansion", then enter a suitable
name as shown in the figure below.
SKF Multilog On-Line System IMx-M
User Manual