BK Precision 894 - Accuracy of Rp; Accuracy of Rs; Accuracy of DCR; Accuracy of Leakage Inductance Lk

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Accuracy of Rp
When D
x
(value of tested D) ≤ 0.1 the accuracy of R
p
is given by the formula below:
R
p
= [Ω]
Where, R
px
is the value of tested R
p
with the unit [S].
D
x
is the value of test D with the unit [F].
D
e
is the accuracy of D.
Accuracy of Rs
When D
x
(value of tested D) ≤0.1
The accuracy of R
s
is given by the formula below:
R
se
= X
x
×D
e
[Ω]
X
x
= 2πfL
x
, for inductance.
X
x
= , for capacitance.
Where, X
x
is the value of test X with the unit [S].
C
x
is the value of test C with the unit [F].
L
x
is the value of test L with the unit [H].
D
e
is the accuracy of D
F is test frequency
Accuracy of DCR
A (1+R
x
/5MΩ+16mΩ/R
x
)[%] ± 0.2 mΩ
When the instrument is in Middle and slow speed, A=0.25
In Fast speed, A=0.5
Where, R
x
is the tested resistance.
Accuracy of leakage inductance Lk
Inductance L’s accuracy +0.2
ex
epx
DD
DR



xfC  2
1
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