User`s guide

5 Calibration
54 Keysight U2802A 31-Channel Thermocouple Input User’s Guide
Calibration
Calibration Information
The Keysight U2802A is factory calibrated and the calibration constants
are stored in the EEPROM. During initial setup, the calibration constants
are read from the EEPROM before any measurements are taken.
Zeroing Function
The Keysight U2802A thermocouple input device operating in
thermocouple mode can be set to zero mode, where the differential inputs
of each channel are shorted together. This zeroing function is used to
measure the total system offset errors due to initial offset error,
temperature drift error, and long term drift error from the DAQ (U2355A
or U2356A) and the U2802A. This measurement can then be subtracted
from subsequent measurements in order to remove the system offset error.
U2802A_UG.book Page 54 Monday, January 19, 2015 10:28 PM