Maxim Integrated 6612_OMU_S2+2_URT_V1_14 - Manual (Page 12)

6612_OMU_S2+2_URT_V1_14 Firmware Description Document UG_6612_017
12 Rev. 1.0
4.5 Calibration Commands
Using the precision source method, the user provides a precision voltage and precision current load to
the device for calibration. The 6612_OMU_S2+2_URT_V1_14 firmware provides commands to calibrate
the measurement units. For linear current sensors, such as current shunt, no phase calibration is
necessary.
There are two types of calibration commands. The first type provides complete calibration. The second
group, called atomic calibration commands, provides calibration for individual portions of the IC.
4.5.1 Complete Calibration Command (“Single Command Calibration”)
There are two calibration commands in this first group: CAL and CALW. Only one of these commands
is needed to calibrate the System/Unit.
To use these commands, a precision voltage source and a precision current source are required
4.5.1.1 CAL Command
To use the CAL command, enter the following:
>CAL
The response is:
TCal OK
VCal OK
ICal 0 OK
>
The device would calibrate the temperature (reads CE register 71, enters it into MPU register C0, and
saves to flash), calibrate the voltage (adjusts CAL VA and CAL VB registers and saves them to flash),
and finally calibrate the current (adjusts CAL IA register and saves to flash).