©
National Instruments Corporation
5-1
SCXI-1102/B/C User Manual
Chapter
5
Calibration
This chapter discusses the calibration procedures for the
SCXI-1102/B/C modules.
Overview
Using the procedure described in this chapter, you will be able to
calculate the gain error and voltage offset on a per channel per gain
basis. You can store these constants in the onboard EEPROM for future
use and for automatic calibration when you are using National
Instruments software. The module comes from the factory with
factory-determined calibration constants in the EEPROM. However, it
is recommended that you recalibrate a module at least once per year or
when you operate the module outside of the 20
°
to 30
°
C temperature
range.
In order to calibrate the SCXI-1102/B/C modules, you will need to
apply precision voltages to the channel inputs and/or ground the
channel inputs.
Calibration Procedure
Calibration Equipment Requirements
According to standard practice, the equipment you use to calibrate the
SCXI-1102/B/C module should be 10 times as accurate as the
SCXI-1102/B/C module. Calibration equipment with four times the
accuracy of the SCXI-1102/B/C is generally considered acceptable.