Keithley 236 Service Manual

SECTION 1.
Performance
Verification
1
53
Voltage
Source Veritication
Setup
the
equipment
as shown
in Figure
13 and
perform
the following
steps to verify
the voltage
source.
WARNING
The
following
procedure
uses hazardous
voltages
(1000V
forthe
Model
237)that
could
cause injury or
death,
Exercise
extreme
cau
tion
when
encountering
these
lethal voltage
levels.
1.
Set the Model
193A
to measure DCV
on the 200mV
range.
2. While in
standby,
set the Model
236 to source 0V
on
the 1.1V
range
and
set
compliance
to lOmA.
3, Temporarily
disconnect the banana
cable from
BINDING
POST
2 at the rear panel
panel of the
test
fixture and
connect
it
to VOLTS
LO of the Model
193A. This will short
the input of the
Model 193A
DMM.
4,
On the
Model 193A, press ZERO
to cancel any meas
urement
offsets,
5. Re-connect
the banana cable to BINDING
POST
2
of
the
test
fixture.
6.
Place
the Model
236/237
in operate
and verify that
the reading
on
the DMM is within
the
limits
shown
in the
first
entry ofTable
14.
Use
the ifiter ifthe read
ing is
noisy.
7,
Press the
SELECT
4
button to select
the 11V range
and verify
that the DMM readingis
within the allow
able
limits in
Table
1-4.
8. Using Table 1-4
as a
guide, repeat
step
7 to check the
OV
output on
the
110V and 1100V
ranges
9,
From the keypad, program
the Model
236 to
source
+1V
on the 1.1V range
and verify that reading
on the
193A DMM is
within
the allowable
limits.
10. Repeat
step
9
for a source
value of —1V.
11.
Using Table 1-4 as
a guide, check source values
of
±10V, ±100V and
for the Model
237,
±1000V.
12. Program
the Model
236/237
to
0V
and place it in
standby.
Table 14.
Voltage Source Verification
236/237
236/237 Allowable Reading
on Model 193A
Source
Value*
Source Range
193A Range
(18°C
to
28°C)
0V
1.1V 200mV
-0.650mV
to
+0.650mV
0V
11V 200mV -2.400mV
to
+2,400mV
0V
110V
200mV
—24,000mV to +24000mV
0V
1100V
2V
-0.240V
to
+0.240V
+1V
1.1V
2V +0.99902V to
+100098V
-1V
1.1V
2V
-0.99902V
to
-1 00098V
+10V
11V
20V
+99943V
to
+100057V
-10V
11V
20V -99943V
to —100057V
+100V
110V 200V
+99.943V
to
+100.057V
—100V
110V
200V -99,943V
to
—100.057V
+1000V
1100V
1000V +999.36V
to
+1000,64V
—
—1000V
1100V
1000V
—999.36V to
—1000.64V
compliance
is set to lOmA.
1-8

Keithley 236 Specifications

General

Brand	Keithley
Model	236
Category	Measuring Instruments
Language	English