Measurement Uncertainty Analysis - Instrument Accuracy Test D
E4416A/E4417A Power Meters Service Guide D-157
Therefore to attain a power of 100 mW as shown in the Table D- 2, instead of
applying 14.4493 Volts, the actual amount of voltage required from the
Universal Source would be:
14.4493 × 1.075533 = 15.6 Volts
By using the DMM Uncertainties calculated previously the worst case voltage
and corresponding power errors can be calculated.
Power Setting (mW) Applied Volts DMM Error on Range
Standard Uncertainty
(
μV)
Worst Case Voltage
Error on Range (%)
Worst Case Power
Error on Range
0.001 0.14493 mV <1.371
μV 0.946% 0.00946 μW
0.01 1.4493 mV <1.371
μV 0.0946% 0.00946 μW
0.1 14.493 mV 1.371
μV 0.00946% 0.00946 μW
1 144.93 mV 6.09
μV 0.00420% 0.042 μW
10 1.4588 V 56.8
μV 0.00389% 0.389 μW
100 15.6 V 148.8
μV 0.00095% 0.95 μW
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