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Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
February 2015
F.2.10 Trim 4 mA / Trim 20 mA
This is for calibrating the 4 mA and 20 mA output current from the transmitter. The output
current is temporarily set to 4 mA and 20 mA. Measure the actual output current and then input
that mA value to re-calibrate. The output current resumes normal operation after exiting.
Note
The re-calibration procedure is automatically cancelled after 20 minutes of inactivity, and
the previous calibration is restored.
Field Communicator
To re-calibrate the 4 mA and 20 mA output current:
1. From the Home screen, select 3: Service Tools.
2. Select 4: Maintenance.
3. Select 1: Analog Calibration.
4. Select 1: D/A Trim.
5. Follow the instruction “Connect reference meter”, and then press “OK”.
6. Input the measured mA from the reference meter, and press “ENTER”.
7. Select 1: Yes, and then “OK” to now calibrate the 20 mA output current.
8. Input the measured mA from the reference meter, and press “ENTER”.
9. Select 1: Yes. (The output current now returns to normal operation).
Note
When messages appear, take appropriate action if needed and press “OK”.
Mobrey MCU900 Series control unit
To re-calibrate the 4 mA output current:
1. From the Main Menu screen, select SETUP.
2. Select the transmitter (e.g. “Tx1:MSP400RH”).
3. Select SYSTEM, TRIM, and then Trim 4mA.
4. Connect a reference meter.
5. Follow the on-screen instructions to start the re-calibration feature.
(Press the Enter ( ) key if prompted to change the mode to “off-line”).
6. Input the measured mA from the reference meter, and select “Save”.
Fast Keys
3, 4, 1, 1
Analog Calibration
1. D/A Trim
1. D/A Trim
SAVE
HOME
HELP
(Field Communicator Screen)
Esc=Quit =Start
TRIM 4mA
(Mobrey MCU901 Screen)