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Keithley 237

Keithley 237
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APPENDIXF
236/237
Performance
Verification
+
Table
F-1.
Required
Test
Equipment
Manufacturer
Model
Description
Specifications
Keithley 263
5-1/2
digit Calibrator
I
2nA,
20nA
ranges;
±(0.0625%
+
10 counts)
Source 200nA
range; ±(0.035%
+
10 counts)
Keithley
193A
5-1/2
digit
DMM
200mV,2V
ranges;
±(0.005%
+
2 counts)
20V-1000Vranges;±(0.007%
+
1 count)
200.Q-200k.Q
ranges;
±(0.007%
+
2 counts)
Keithley
617
4-1/2digit
2pA
range; ±(1.6%
+
66
counts)
Electrometer
20pA
range; ±(1.6%
+
7 counts)
200pA
range; ±(1.6%
+
1 count)
2nA range; ±(0.25%
+
5 counts)
20nA
range;
±(0.25%
+
1 count)
200nA range;
±(0.25%
+
1 count)
2~
range;
±(0.15%
+
4 counts)
20~
range;
±(0.15%
+
1 count)
Keithley
8006
Test Fixture
-
Keithley 236-ILC-3
Interlock Cable
-
Fluke 343A
De Voltage Calibrator 10V-1000V
ranges;
±0.002%
Valhalla
2500E
Current
Calibrator
300mA range; ±0.025%
Keithley
R-185-10
10n
Resistor
±0.1%,±10ppmfOC
R-249-100
100.Q
Resistor
±0.1%,±20ppmfOC
R-263-1k
1k.Q
Resistor
±0.1
%,
±10ppm/°C
R-263-100K
100k.Q
Resistor
±0.1
%,
±10ppmfOC
Keithley
7078-TRX 3-slot Triax cable
-
(3
required)
Keithley
6172
2-slot male
to
3-lug fe-
-
male triax
adapter
(2 required)
Pomona
B-24
Banana
plug
cable
-
(6
required)
F.5 VERIFICATIONS PROCEDURES
the
instrument
is
out
of
specifications
and
not
under
war-
ranty, refer
to
the
calibration section of this manual.
The
following
paragraphs
contain
the
detailed proce-
dures
for verifying
the
one
year
accuracy specifications
of
the Model 236/237
using
the
equipment
listed
in
Table F-1.
The
allowable
reading
limits
in
these proce-
dures
include
error
that
could
be
contributed
by
this
equipment.
These procedures
are
intended
for
use
only
by
qualified
personnel
using
accurate
and
reliable test equipment.
If
F-2
+
WARNING
Lethal
voltages
(up
to
lOOOV
for
the
Model
237)
will
be
connected
to
the
Model8006
test
fixture.
To
avoid
a
possible
shock
hazard,
the
safety
interlock
circuit
must
be
con-
nected
to
the
Model236/237.

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