Keysight Technologies E4417A

C Measurement Uncertainty Analysis - Power Reference Level Test
152 Keysight E4416A/E4417A Power Meters Service Guide
with;
0.15 ppm of Reading + 0.01 ppm of Range per
o
C (temp coefficient Tcal ±5
o
C)
± 8.75 ppm of Reading + 0.55 ppm of Range
Therefore,
For V
0
and V
1
, two measurements are taken, so the uncertainty is equated to the
RSS of using two DMMs;
UV
comp
()UV
ref
()
8.75 5×
1000000
-----------------
0.55 10×
1000000
------------------+± 49.25 μ V±== =
Voltage measurement Uncertainty
U (V
comp
)
49.25 μV
U (V
o
)
69.65 μV
U (V
1
)
69.65 μV