I have been struggling with communication errors with the Multi-Cal system.
Yesterday, i successfully calibrated a 4-20mA transmitter. After calibration, I used the muli-cal system/program (Rev J) to read the EEPROM. After reading the EEPROM on the 4-20mA unit, its output pinned at 2.22mA and was not responding to pressure stimulus (no change in output). I power cycled the unit and still the output remained pinned. I think stared a new calibration on the unit and was able to get the unit to function again. However, if i read the EEPROM, the same issue would occur.
Today, I tried calibrating a 0-5VDC unit. The unit was already calibrated prior to installing it into the system. When it was hooked up, the unit functioned and showed voltage output changing with pressure input. I then tried to read the EEPROM for this unit. It seemed to successfully read the EEPROM. However, when i went to recalibrate the unit, i got a "communication error". I then tried to re-read the EEPROM for this unit and I got erroneous data (all registers read 0A0A (hex).
Is there an issue with the software that causes this issue? What could be the problem?
Regards,
Avi