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EPC3004 is out of calibration at "hot" only....RTD.

EPC is out by 10 degrees C at hot only (85) it reads good at cold (-40 C). I did replace the RTD, the setting is set to the right one (PT100). I do have other EPC3004s that work fine with the RTDs.
The unit does work and read fine with a K type thermocoupler.

How can I calibrate the controller? Do I have a bad unit?
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