B&K Precision 886 - Manual - Manual (Page 17)

14
D
Ae
= Ae of |Zx|
Accuracy applies when Dx (measured D value) ≦ 0.1
When Dx > 0.1, multiply Dx by (1+Dx)
Example:
Test Condition:
Frequency : 1KHz
Level : 1Vrms
Speed : Slow
DUT : 100nF
Then
Ω =
⋅ ⋅ ⋅ ⋅
=
⋅ ⋅ ⋅
=
−
1590
10 100 10 2
1
2
1
9 3
π
π
Cx f
Zx
Refer to the accuracy table, get
C
Ae
=±0.2%,
002 . 0
100
± = ⋅ ± =
Ae
D
Ae
Q Accuracy:
De Qx
De Qx
Ae
Q
⋅
⋅
± =

1
2
Q
Ae
= Ae of |Zx|
Qx : Measured Quality Factor Value
De : Relative D Accuracy