Thermo Scientific LevelPRO Series, Installation Manual

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Thermo Fisher Scientific LevelPRO Installation Guide
D-1
Appendix D
Replacing the CPU PROM & HART
PROM
Note
This appendix applies only to gauges that have the HART
communication option installed and have CPU software prior to version
5.15 or HART board software prior to 1.17.

Software has been released for LevelPRO detectors that have the HART
communication option installed. This software makes the HART
communication and the Thermo Scientific 9734 handheld terminal
(HHT) communication more reliable. This software upgrade requires that
both the LevelPRO CPU PROM and the HART board PROM be
replaced. This appendix provides the instructions for doing so.
Due to the difficulty in reaching the HART board, it is recommended that
the detector be removed from the housing and taken to a clean, dry area to
perform this procedure.
Caution
If performed in place, care needs to be taken to not drop the
PROMs or the LevelPRO.

Once the detector is out of the housing, you will see that the CPU board is
readily accessible; however, the HART board is mounted between the
chassis plates and is difficult to access.
Purpose
Procedure