National Instruments 1142 用户手册
Chapter 5
Using the SCXI-1141/1142/1143 Module
© National Instruments Corporation
5-13
Calibration
The SCXI-1141/1142/1143 is shipped with a calibration certificate and is
calibrated at the factory to the specifications described in Appendix A,
calibrated at the factory to the specifications described in Appendix A,
. Calibration constants are stored inside the calibration
EEPROM and provide software correction values your application
development software uses to correct the measurements for both offset and
gain errors in the module.
development software uses to correct the measurements for both offset and
gain errors in the module.
External Calibration
If you have an accurate calibrator and DMM, you can externally calibrate
the SCXI-1141/1142/1143 gain and offset constants using NI-DAQmx
functions.
the SCXI-1141/1142/1143 gain and offset constants using NI-DAQmx
functions.
Most external calibration documents for SCXI modules are available to
download from
download from
ni.com/calibration
by clicking Manual Calibration
Procedures. For external calibration of modules not listed there, Basic
Calibration Service or Detailed Calibration Service is recommended.
You can get information about both of these calibration services from
Calibration Service or Detailed Calibration Service is recommended.
You can get information about both of these calibration services from
ni.com/calibration
. NI recommends performing an external
calibration once a year.