4 | ni.com | NI 5114 Calibration Procedure
Password
The default calibration password is NI.
Calibration Interval
External Calibration
The measurement accuracy requirements of your application determine how often you should
externally calibrate the NI 5114. 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 or the requirements of your processes. Refer to Appendix A:
Calibration for more information.
Self-Calibration
Self-calibration can be performed as necessary to compensate for environmental changes.
Caution Although you can use self-calibration repeatedly, self-calibrating the
NI 5114 more than a few times a day may cause excessive wear on the relays over
time.
Test Equipment
Table 3 lists the equipment required for externally calibrating the NI 5114. If you do not have
the recommended instruments, use these specifications to select a substitute calibration standard.
Note The delay times indicated in this procedure apply specifically to the
Fluke 9500B calibrator. If you use a different calibrator, you may need to adjust these
delay times.
Table 3. Required Equipment Specifications for the NI 5114 External Calibration
Required
Equipment
Recommended
Equipment
Parameter
Measured
Specification
Signal
Generator
Fluke 9500B
Oscilloscope Calibrator
or
Wavetek 9500
(with high-stability
reference option)
Fluke 9510 Test Head
DC Accuracy DC ±(0.025% + 25 µV) into
1MΩ
Bandwidth,
Trigger
Sensitivity
±2% output amplitude
flatness for leveled sine wave
up to 125 MHz relative to
50 kHz into 50 Ω
Timing ±2 ppm frequency accuracy
BNC cable — — 50 Ω
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