C
Measurement Uncertainty Analysis - Power Reference Level Test
C-140
E4416A/E4417A Power Meters Service Guide
with;
0.15 ppm of R 0.01 ppm of Range per
o
C (temp coefficient Tcal ±5
o
C)
± 8.75 ppm of R 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;
Voltage measurement
Uncertainty
U (V
comp
)
49.25
μ
V
U (V
o
)
69.65
μ
V
U (V
1
)
69.65
μ
V
U V
comp
(
)
U V
ref
(
)
8.75
5
×
1000000
---------------------
0.55
10
×
1000000
-----------------------
+
±
49.25
μ
V
±
=
=
=
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