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National Instruments Corporation
5
NI 5450 Calibration Procedure
Password
A password is required to open an external calibration session. If the
password has not been changed since manufacturing, the password is
NI
.
Calibration Interval
External Calibration
The measurement accuracy requirements of your application determine
how often you should externally calibrate the NI 5152/5153/5154.
NI recommends that you perform a complete external calibration at least
once every two years. You can shorten this interval based on the accuracy
demands of your application. Refer to
Appendix A: Calibration Options
for more information.
Self-Calibration
Self-calibration can be performed whenever necessary to compensate for
environmental changes.
Caution
Although you can use self-calibration repeatedly, self-calibrating the
NI 5152/5153/5154 more than a few times a day may cause excessive wear on the relays
over time.
Test Equipment
Table 2 lists the equipment required for externally calibrating the
NI 5152/5153/5154. If you do not have the recommended instruments,
use these specifications to select a substitute calibration standard.