The 750P pressure module cable can become damaged due to improper connecting the Lemo connector to a Fluke pressure calibrator or from wear and tear over the years in a harsh environment.
The good news is that the cable can be replaced in the field without the need for re-calibration.
The 750P pressure module cable part number is 4468923.
The 750P cable has a connector on the end connecting to the 750P, so no soldering is required.
See the instructions and pictures below for reference.
1) Remove the 4 screws on the back of the 750P pressure module and remove the bottom cover.
2) Replace and route the cable as shown, connecting to the PCA.
3) Replace the back cover and test to verify correct operation.