Honeywell SMV800 User Manual page 195

Resetting Calibration for Process Temperature:
Reset Calibration using SMV Modbus application:
1. Connect power supply and RS485 connectors to the signal terminals of the
Transmitter's terminal block.
2. Turn on the power supply, and allow the Transmitter to become stable.
3. Launch SMV Modbus application, connect to the device and go to the PT
Calibration screen as show below. PT Calibration is available at Maintenance-
>Calibration and Correction Records->Process Temperature Calibration.
4. Click on "PT Reset Corrects" button. follow the on-screen prompts.
Reset Corrects for Process Temperature manually by writing to Modbus
registers:
1. Write the date in the DDMMYY-- format in the calibration date register. (Register
address 125-126)

The date to be written as month and day followed by the year.

Year to be entered as year -1900.
For example, to enter calibration date as June 10
126 as 0x0A067600
2. Write to single coil address 10 as ON
Revision 1.0 SMV800 Modbus User's Guide
th
2018 write to register 125-
Page 183