Keysight 34972A - Page 290

7Tutorial
290 Keysight 34970A/34972A User’s Guide
Where:
V
f
= Common mode float voltage
R
s
= LO lead resistance
R
i
= Isolation resistance
C
i
= Isolation capacitance
Z
i
= Parallel impedance of R
i
+ C
i
Error (V
L
) =
DMM
R
i
>10 GW
»C
i
250 pF
HI
V
test
V
f
R
s
LO
+ V
L
-
V
f
R
s
×
R
s
Z+
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