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Keithley 237

Keithley 237
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APPENDIXF
236/237
Performance
Verification
Table
F-9.
Low
Current
Source
Verification
(lnA
to
lOmA)
263
1-Source
236/237
1-Source*
617
Output
Source
Source
617
Allowable
Readings**
Range
Range
Setting
Range
Value***
(18°C
to
28°C)
2pA
2nA
Standby
1nA
OnA -0.4500pA
to
+0.4500pA
2pA
2nA
Standby
10nA
OnA
-2.000pA
to
+2.000pA
20pA
2nA
Standby
100nA OnA
-20.00pA
to
+20.00pA
200pA
2nA
Standby
1J.LA
OJ.LA
-200.0pA
to
+200.0pA
2nA 2nA
Standby
10J.LA
OJ.LA
-2.000nA
to
+2.000nA
20nA
2nA
Standby
100J.LA
OJ.LA
-20.00nA
to
+20.00nA
200nA
2nA
Standby
1mA
OmA
-200.0nA
to
+200.0nA
2J.LA
2nA
Standby
10mA
OmA
-2.000J.LA
to
+2.000J.LA
20pA
2nA
+0.9nA
1nA
-0.9nA
-3.150pA
to
+3.150pA
-0.9nA
+0.9nA
200pA 20nA
+9nA
10nA
-9nA
-29.00pA
to
+29.00pA
-9nA
+9nA
200pA
200nA
+90nA
100nA
-90nA
-209.0pA
to
+209.0pA
-90nA
+90nA
2nA
2J.LA
+0.9J.LA
1J.LA
-lo.911A
-
nA
to
+
nA
-0.9J.LA
+lo.911A
20nA
20J.LA
+9J.LA
10J.LA
-1911A
-
nA
to
+
nA
-9J.LA
+1911A
200nA
+90J.LA
100J.LA
-19011A
-
nA
to
+
nA
200J.LA
-90J.LA
+190IIA
2J.LA
2mA
+0.9mA
1mA
-lo.9mA
-
J.LA
to+
J.LA
-0.9mA
+lo.9mA
2J.LA
20mA
+9mA
10mA
-19mA
-
J.LA
to
+
J.LA
-9mA
+19mA
*
'136/'137
compliance limit set to
l.lV
on
the
l.lV
measurement range.
,...
Allowable readings for the
1~
thru
lOrnA source ranges are calculated in Table F-8.
,...,.
For the
1~
thru
lOrnA ranges, program the
Model236/'l37 to source the characterized !-source valued from Table
F-3.
F.5.8
1
OOmA
Measure Range
Verification
Set
up
the
equipment
as
shown
in
Figure
F-8.
The
10.0.
re-
sistor (R-185-10) is installed
in
the
test
socket
This
procedure
requires
the
characterized
value
of
the
10Q
resistor for
current
calculations.
The
characterized
value
of
this
resistor
was
previously
recorded
in
step
43
+
of
paragraph
F.5.1.
Transfer
that
resistance
value
to
the
space
provided
below:
Rton
=
-------
Q
Perform
the
following
steps
to
verify
the
100mA
meas-
urement
range:
1.
While
in
standby,
set
the
Model236/237
to
source
OV
on
the
1.1V
source
range,
and
set
compliance
to
100mA.
F-17

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