Calibration - ICP DAS USA ET-7H16M Series User Manual

8. Calibration

When shipped from the factory, PET-7H16M is already fully calibrated, including the calibration
coefficients that are stored in the onboard EEPROM. For a more precise application of voltages in
the field, the procedure described below provides a method that allows the board installed in a
specific system to be calibrated so that the correct voltages can be achieved for the field
connection. This calibration allows the effects of voltage drops caused by IR loss in the cable
and/or the connector to be eliminated.
At first the user has to prepare the equipment for calibration

Precise multi-meter (The more precise meter is better)

Stable power supply

The calibration procedure will be described in detail in the following.
Connect the AI channels to the meter and power supply, as shown below:
PET-7H16M Series User Manual, version 1.0.1 P.73