Agilent Technologies E4418B Service Manual page 134

Measurement Uncertainty Analysis – Instrument Accuracy Test
Measurement Introduction
Worst case error on 0.1V range:
Error = ((9ppm x 100mV) + (3ppm x 100mV)) + (6ppm x 100mV) + 5((0.15ppm x 100mV) + 100mV))
= 2.375uV
Voltage Error
2.375uV
Worst case error on 1V range
Error = ((8ppm x 1.0V) + (0.3ppm x 1.0V)) + (1ppm x 1.0V) + 5((0.15ppm x 1.0V) + (0.1ppm x 1.0V))
= 10.55uV
Voltage Error
10.55uV
Worst case error on 10V range
Error = ((8ppm x 10.0V) + (0.05ppm x 10.0V)) + (1ppm x 10.0V) + 5((0.15ppm x 10.0V) + (0.01ppm x 10.0V))
= 98.5uV
Voltage Error
98.5uV
A-6
Percentage Error = 0.002375%
Distribution
Rectangular
Percentage Error = 0.001055%
Distribution
Rectangular
Percentage Error = 0.000985%
Distribution
Rectangular
Standard Uncertainty
1.371uV
Standard Uncertainty
6.09uV
Standard Uncertainty
56.8uV
Agilent E4416A/E4417A Service Guide