Agilent Technologies 4349B - Wait Time

4349B
W
ait
Time
Figure
6-8.
Wait
Time
When
the
test
voltage
is
dierent
from
the
precharge
voltage
,
a
wait
time
is
required
regardless of
performance
of
the
high
resistance
meter
.
The
wait
time
t
w
is calculated
as
follows:
t
w
=
0
C
x
2
(
R
s
+
R
i
)
2
l
n
(
X
100
2
R
s
+
R
i
R
x
2
1
K
)
where
, R
s
:
source resistance
[],
R
i
:
input resistance
[],
X
: measurement
error [%],
K
:(T
est voltage
0 Charge
voltage)
/
T
est
voltage
F
or
example
,
when
Rs
is
1
k
(=10
3
),
Cx
:
1

F
(=10
-6
F),
Rx
:
1
G
(=10
9
),
X
is
10%,
and
Kis
0.1,
the
wait
time
is
,
t
w
= 0
10
0 6
2 (10
3
+10
3
) 2
ln
(
10
100
2
10
3
+10
3
10
9
2
1
0 : 1
)
=
26 : 2[ ms ]
Application Measurement 6-13