OBL PRO Series Use And Maintenance Manual page 30

Figure 13
Loop installation
To the signal, the items required are:
Analog input:
1) Power loop (max 14 Vdc voltage in parallel on the pins)
2) Multimeter to measure 4-20 mA
Analog output:
3) Power loop (max 48 Vdc)
4) Multimeter to measure 4-20 mA
The loop must be connected to PRO according to the cables table described in the manual.
The multimeter shall be connected in series to close the loop and measure current. Please refer to
multimeter manual for connection specifications.
Calibration
To calibrate the analog signal the necessary operations are the followings:
1) Power up the loop for analog input signal.
2) Go to the menu "setting→calibration"
3) Click the handwheel for 10 sec until will appear 3 new fields
a. Analog ma
b. Analog V
c. Analog Output
4) Click on analog input
5) A window with 2 values "4 mA" and "20 mA" will appear and a value on the bottom of
the screen is proportional to the input current.
6) To calibrate 4 mA input signal:
a. Set current input at 4 mA.
b. Click on 4 mA (1100 as default)
c. Change the value
d. The value the bottom of the screen will change.
e. Change the value close to 4 mA to reach the value at the bottom of the screen.
7) To calibrate 20 mA input signal:
File: UT-5601
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