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Table 3-16. 5720A Resistance Test Record (cont)
Std
Res
Value
DMM Std
Res Rdg
DMM
Error
DMM
UUT Res
Value
UUT True
Res Value
UUT Dev. Uncert
Std
Spec
(ppm)
TUR GB
Factor
Test
Limit
(±ppm)
Max
Difference of
Characterized to
Nominal Value
1.9 MΩ (1) 19 1.89962M to 1.90038M
10 MΩ) 12.0 37 3.07 0.982 36.3 9.997M to 10.003M
19 MΩ 21.9 47 2.15 0.942 44.3 18.9943M to 19.0057M
100 MΩ
(2)
110 99.95M to 100.05M
1: Not necessary to test due to 5720A Series II internal calibration process. Uncertainties and test limits are shown for other available 742A Standard Resistors.
2: Due to extremely slow settling time (approximately 5 minutes to 0.005% and sensitivity to any nearby movement, use of the DMM to test 100 megohms to the
specified 0.01% uncertainty is not practical and therefore is not recommended. For those who wish to test it, a suitable way is to use an ESI SR 1050 10M/step
Hamon-type Resistance Transfer Standard and use it in conjunction with an ESI 242-series bridge to effect the measurement to the required uncertainty.