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© National Instruments Corporation 61 NI 4070/4072 Calibration Procedure
4-Wire Resistance
Note Tolerances are provided for 4-wire resistance instead of absolute limits because the
limits depend on the actual resistance value output by your calibrator.
2-Wire Resistance
Note Tolerances are provided for 2-wire resistance instead of absolute limits because the
limits depend on the actual resistance value output by your calibrator.
Table 17. NI 4070/4072 4-Wire Resistance Verification Tolerances
Calibrator
Resistance
Range
2-Year Tolerance
(ppm of Range)
24-Hour Tolerance
(ppm of Range)
10 MΩ 10 MΩ ±410 ppm ±102 ppm
1MΩ 1MΩ ±100ppm ±22 ppm
100 kΩ 100 kΩ ±86 ppm ±17ppm
10 kΩ 10 kΩ ±83 ppm ±14 ppm
1kΩ 1kΩ ±83 ppm ±14 ppm
100 Ω 100 Ω ±90 ppm ±25 ppm
0 Ω 10 MΩ ±10 ppm ±2 ppm
0 Ω 1MΩ ±10 ppm ±2 ppm
0 Ω 100 kΩ ±6 ppm ±2ppm
0 Ω 10 kΩ ±3 ppm ±2 ppm
0 Ω 1kΩ ±3 ppm ±2 ppm
0 Ω 100 Ω ±10 ppm ±10 ppm
Table 18. NI 4070/4072 2-Wire Resistance Verification Tolerances
Calibrator
Resistance
Range
2-Year Tolerance
(ppm of Range)
24-Hour Tolerance
(ppm of Range)
0 Ω 10 kΩ ±40 ppm ±20 ppm
0 Ω 1kΩ ±400 ppm ±200 ppm
0 Ω 100 Ω ±4000 ppm ±2000 ppm
100 MΩ 100 MΩ ±6040 ppm ±920 ppm
10 MΩ 10 MΩ ±410 ppm ±102 ppm
1MΩ 1MΩ ±100 ppm ±22 ppm