Specified Uncertainties - HP 435B Operating And Service Manual

O
peration
M o d e l 435 Β
3-10
Condit i ons : R ange - 1
m
W
Meter R ea ding - 0.7
m
W
Se
n
so
r
- 8481 Α
Fr
e
qu
e
n
c
y -
1 G
Hz
C
AL F
AC
T
O
R
- 99 .5% ο
(F S) In strum e n tat ion Un certain ty = ±1 .0%ο = ±0 .01
m
W
= ±0 .06 dB
(R)
P
ower Re f e rence Un certain ty = ±0.7% ο = ±0 .0049
m
W
= ±0 .03 dB
(R) CA L FA CT O R Switch Resolution Un certain ty = ±0.5%ο = ±0 .0035
m
W
= ±0 .02 dB
(R)
Z
ero Set Un certainty = ±0.002% ο = ±0 .000015
m
W
= ±0 .00009 dB
(FS)
Z
ero Carryover Un certainty = ±0.5%ο = ±0 .005
m
W
= ±0 .03 dB
(R) Noise = ±0.006% ο = ±0 .00004
m
W
= ±0 .00025 dB
(R) Drift = ±0 .002% ο = ±0 .000015
m
W
= ±0 .00009 dB
(R) Cal Factor Uncertain ty = ±2 .70% ο = ±0 .019
m
W
= ±0 .12 dB
Total
S
pecified Uncertain ties = ±0.0425
m
W
=
0.0 0 425
(100) = ±6.07%
ΝΟΤΕ :
F
S = % ο
o
f full scale
R = %ο
o
f reading
S
PE
CI
F
I
E
D
UN
C ER
TAI
N
TY CA
L C UL
ATIO
N
= 10
l
og
0'7425 =
+0.26 dB
0.7
F
igure 3-5. S
p
ecifie
d U
ncertai
n
ties
±0 .0425
m
W