OPERATION & MAINTENANCE MANUAL TMS2000/3000
TMS Operations and Maintenance Manual.docx February 12, 2018
PAGE 81
APPENDIX D – TMS2000A1x 4-20ma Calibration Procedure
The following procedure describes the simple process of calibrating a loop-powered 4-20ma level transmitter with:
• TMS2000A11: Supports 2-level transmitters/2 leak/point-level sensors
• TMS2000A12: Supports 4-level transmitters/4 leak/point-level sensors.
This appendix only describes that portion of system setup specific to 4-20ma level transmitters. All other setup
requirements, including tank geometry, are described in the main section of this Operations Manual. Please refer to
the main section if you are unfamiliar with system programming, or consult Pneumercator Technical Support at
(800) 209-7858 for assistance.
1) Either enter CONFIG/PROBE menu from front panel, or select TANK/PROBE submenu from TMSComm.
2) Set PROBE TYPE to “2-412”.
3) Enter PROBE LEN (Probe Length) as the length represented by the span of the transmitter, i.e. from 4ma to
20ma. For example, if the 16ma range represents 100”, enter 100” as the PROBE LEN.
4) Set PROD HO (Product Height Offset) to +0.0.
5) Repeat for all tanks and save configuration.
6) Record the actual tank level(s) using a dip stick.
7) Select VIEW mode and set to product level, i.e. IN(mm).
8) Record the difference between actual and displayed level readings as actual – displayed for all desired tanks.
For example, if actual reads 60.5” and displayed shows 58.3”, difference is +2.2”.
9) Either enter CONFIG/PROBE menu from front panel, or select TANK/PROBE submenu from TMSComm.
10) Set PROD HO (Product Height Offset) to the recorded difference in height for the selected tank.
11) Repeat for all tanks and save configuration.
12) 4-20ma transmitters should now be calibrated. It is highly recommended that programming be confirmed by
checking level readings with both 4ma and 20ma signals prior to putting the system into service. Most
transmitters have this capability built in. Assuming all other setup parameters have been programmed,
including tank geometry, system should now be ready for service.
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