
19
IYI – θ accuracy
IYI accuracy Y
a
= A + (B x IY
m
I + C/IY
m
I ) x 100[%]
θ accuracy θ
a
= sin
–1
(Y
a
/100)
Where, IY
m
I is IYI measured. A, B, and C are obtained from Figure 9.
R – X accuracy (depends on D)
Accuracy D ≤ 0.2 0.2 < D ≤ 5 5 < D
R
a
±X
m
x X
a
/100[Ω]R
a
/cosθ [%] R
a
[%]
X
a
X
a
[%] X
a
/sinθ [%] ±R
m
x X
a
/100[Ω]
Where,
D can be calculated as: R/X, or
R/(2πf x L
s
), or
R x 2πf x C
s
θ can be calculated as: tan
–1
(X/R), or
tan
–1
(2πf x L
s
/R), or
tan
–1
(1/(R x 2πf x C
s
))
R
a
= A + (B/lR
m
l + C x lR
m
l) x 100 [%]
X
a
= A + (B/lX
m
l + C x lX
m
l) x 100 [%]
R
m
and X
m
are the measured R and X,
respectively. A, B, and C are obtained from Figure 9.
G – B accuracy (depends on D)
Accuracy D ≤ 0.2 0.2 < D ≤ 5 5 < D
G
a
±B
m
x B
a
/100[S] G
a
/cosθ [%] G
a
[%]
B
a
B
a
[%] B
a
/sinθ [%] ±G
m
x G
a
/100[S]
Where,
D can be calculated as: G/B, or
G/(2πf x C
p
), or
G x 2πf x L
p
θ can be calculated as: tan
–1
(B/G), or
tan
–1
(2πf x C
p
/G), or
tan
–1
(1/(G x 2πf x L
p
))
G
a
= A + (B/lG
m
l + C x lG
m
l) x 100 [%]
B
a
= A + (B/lB
m
l + C x lB
m
l) x 100 [%]
G
m
and B
m
are the measured R and B,
respectively. A, B, and C are obtained from Figure 9.
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