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© National Instruments Corporation 63 NI 4070/4072 Calibration Procedure
Frequency
Capacitance and Inductance
Note Because the actual capacitance verification values can differ from the following
values, Table 22 provides tolerances that correspond to the NI 4072 accuracy
specifications
Table 21. Frequency Limits
NI 6608 Output Frequency
2-Year Limits
Lower Upper
1Hz 0.9999 Hz 1.0001 Hz
20 kHz 19.998 kHz 20.002 kHz
500 kHz 499.95 kHz 500.05 kHz
Table 22. NI 4072 Capacitance and Inductance Verification Tolerances
Verification Values Range
2-Year Tolerances
% of Reading % of Range
0pF 300 pF 0 ±0.5
0uH 10 uH 0 ±1
270 pF 300 pF ±0.15 ±0.1
1nF 1nF ±0.15 ±0.1
1nF 10 nF ±0.15 ±0.1
100 nF 100 nF ±0.15 ±0.1
100 nF 1uF ±0.18 ±0.1
10 uF 10 uF ±0.18 ±0.1
10 uF 100 uF ±0.18 ±0.1
1,000 uF 1,000 uF ±0.18 ±0.1
1,000 uF 10,000 uF ±0.18 ±0.1