Doric Instruments 1000 Pro Series Digital Panel meters are suitable - Manual (Page 24)

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1000-PROC Process Meter
The 1000-PROC can be custom scaled to display a full-scale
reading from 200 to 1999 counts by installing removable jumpers
located on the main board and adjusting the scaling potentiometer
located behind the front panel lens.
4-20mA
Equipment Required:
1. Precision DC current source with a resolution of 0.1ma DC
and an accuracy of 0.1%.
2. Interconnecting copper wire from the DC current source to the
indicator.
3. Trimmer adjusting tool.
STEP 1.
Disconnect power from the unit and remove the front
panel lens.
STEP 2. Connect the DC current source to terminal 1 (+) and
terminal 2 (-) located on the rear of the unit. Reconnect power and
turn the unit on. Allow for a 5-minute warm-up.
STEP 3. Input 4.0mA from the DC current source and adjust the
ZERO pot for a display reading of 0.0 ± 1 count.
STEP 4. Input 20.0 mA from the DC current voltage source and
adjust the SPAN pot for a reading of 100.0±1 count.
STEP 5.
Repeat steps 3 and 4 until no further adjustment is
needed.