Calibration; Remote Indicator Calibration When Connected In Loop With Hart Transmitter - Honeywell RMA801 User Manual

6.1 Remote Indicator calibration when connected in loop with HART
transmitter
The user calibration of Remote Indicator can be performed as follows.
Setup details:
1. RMA801 device
2. HART device
3. HART Host (Handheld 475/Hart server)
4. Reference DMM (optional)
Connect RMA801 device is in series with HART transmitter.
Steps:
1. Connect HART host to the HART device and keep HART device in fixed current
mode.
2. Keep HART device current to fixed 4mA using HART host.
3. Verify that DMM is displaying loop current as 4 mA.
4. In Remote indicator navigate to the calibration menu "Cal Lo"in Standard Display
and press enter key to perform calibration. It will ask to "confirm" then press enter
key. RMA will display "success" message then press menu key to exit. After
successful calibration, Remote indicator will show measured loop current value on
display.
5. Now keep HART device current to fixed 20mA using HART host and wait for few
seconds to stable the loop current.
6. Verify that Digital Multimeter (DMM) is displaying loop current as 20 mA
7. In Remote indicator navigate to the calibration menu "Cal Hi"in Standard Display
and press enter key to perform calibration. It will ask to "confirm" then press enter
key. Remote indicator will display "success" message then press menu key to exit.
After successful calibration, Remote indicator will show measured loop current
value on display.
Note: To update calibration parameetr into NVM (EEPROM), the "Cal Lo" and "Cal Hi" steps must be
done in sequence. If only Cal Lo is performed, then the Remote indicator will not strore the calibration
parameter into the NVM.
31

Calibration

RMA803 Remote Indicator User's Guide Revision 2