ADLINK USB-1903 - Manual (Page 80)

66 Calibration
5.3 Saving Calibration Constants
Factory-calibrated constants are permanently stored in a bank of
the onboard EEPROM and cannot be modified. When the device
is recalibrated, the software stores the new constants in a user-
configurable section of the EEPROM. To restore original factory
calibration settings, the software can copy the factory-calibrated
constants to the user-configurable section of the EEPROM. When
auto-calibration is complete, the new calibration constants can be
saved to the user-configurable banks in the EEPROM.
NOTE: NOTE:
The USB-1903, requiring an external precision current source
to calibrate the current-to-voltage conversion resistor and the
differential buffer in its front-end circuit, does not support auto-
calibration. Please return the module for calibration service if
necessary.
NOTE: NOTE:
X The USB-1900 Series should be warmed up for
at least 15 minutes before initiating auto-calibra-
tion
X Remove the cable before auto-calibrating the
card since the DA outputs are changed during
the process