Endress+Hauser Micropilot FMR20, Operating Instructions Manual, Page: 87 / 102

Micropilot FMR20 HART Operating menu
Hauser 87
Trim 
Navigation  Setup → Advanced setup → Curr.output → Trim
Description Select action for the recalibration of the current output.
The trim can be used to compensate a drift of the current output (which might be caused
by very long cables or by a connected Ex barrier, for example).
Steps of the trim:
1. Select 'Trim' = 4 mA.
2. Measure the output current with a gauged multimeter. If it is not equal to 4 mA:
Enter measured value in the 'Trim value low' parameter.
3. Select 'Trim' = 20 mA.
4. Measure the output current with a gauged multimeter. If it is not equal to 20 mA:
Enter the measured current into the 'Trim value high' parameter.
5. Select 'Trim' = Calculate. The device calculates the new scaling of the output current and
stores it in the RAM.
Selection • Off
• 4 mA
• 20 mA
• Calculate
• Reset
Trim value high 
Navigation  Setup → Advanced setup → Curr.output → Trim value high
Description Enter upper measured value for the trim (around 20 mA).
After this value has been entered:
Select 'Trim' = Calculate.
This initiates the recalibration of the current output.
User entry 18.0 to 22.0 mA
Trim value low 
Navigation  Setup → Advanced setup → Curr.output → Trim value low
Description Enter lower measured value for the trim (around 4 mA).
After this value has been entered:
Select 'Trim' = Calculate.
This initiates the recalibration of the current output.
User entry 3.0 to 5.0 mA