Keithley 236 Service Manual

SECTION 1.
Performance
Verification
4L
Remove the
short from the
input
of
the
Model
193A
and place the
Model 263
in
operate.
42. Record the voltage
measurement
from the
Model
193A
and
then place
the Model
263
in
standby.
record the
calculated value of
Io
in Entry
4
of
Table
27.
Place the Model
263
in
standby.
28.
In the
test
fixture,
remove
the lk2
resistor
and
install
the 1002 resistor
(R-249400).
29.
On the
Model 193A,
select
the Ohms function,
2OO
range and
disable
ZERO.
30.
Repeat
step
3
to
zero
the
Model 193A.
31.
Measure and
record
the
value of the 1002
resistor.
V1oi2
=
_________________
mV
43, Caiculate
the actual
resistance
of
the 1O2 resistor
as
follows:
v‘o 2
Rio =
=_________________________
I9mA
where;
I9mA
15
obtained from Table
13.
R 1o is used
to
verify the lOOmA
source and
measure
range of the Model
236/237.
vb00
I9mA=
=_________________
Rb000
v÷1M=
___________
v
I9niA
15 the characterized
current
for the 2OmA range
of
the
Mode1263.
lt
is
used
to
check the lOmA
meas
urement range ofthe Model
236/237.
Using a
pendil,
record the calculated value of
Io
in Entry
5 of
Table
36. Place the Model 263
in
standby.
37, In the
test
fixture,
remove the 1OO2 resistor and in
stall the 1O2
resistor
(R48540).
38.
On the
Model 193A DMM, disable ZERO and seledt
the 200mv
DC
range.
39, While in standby,
set the Mode1263 to
+9.0000mA
on
the 2OmA
range.
40. Zero the
Model
193A
by
shorting
its
input (VOLTS
HI to
LO)
and
enabling
ZERO.
3, From
the
keypad, change
the source
value to
4.OOOOjiA and record that measurement.
V- 1 =
___________
v
4, Subtract
the two voltage
measurements
from
each
other, verif 3 that
the absolute
value
of the result
is
<15ov.
Vikfl=
V
Vb000
I09mA — =______________________
Rbooo
mA
Rb000 =
_________________________
32.
Set
the
Model
193A to
DCV and the
2V
range,
and
disable
ZERO.
33,
To cancel any
offset, zero the Model 193A
by
short
ing its input
(VOLTS
FR
to
LO)
and
enabling
ZERO.
34, Remove
the short from
the
input
of the
Model
193A
and
set
the Model
263 to source 9.0000mA
on
the
2OmA range and enable
OPERATE.
35,
Record the voltage
measurement from
the Model
193A
and cakulate the current.
v 1000
_________________________
v
mA
1
52 Common
Mode
Verification
Set up
the
equipment
as
shown in
Figure 12
and
perform
the following
steps
for common
mode
verification,
1. While
in
standby,
program the
Mode1236/237
as
fo1
lows;
1
TIME
at
LINECYCLE
PERIOD,
source at
+1,0000jiA, and compliance
at
iv on
the
1.1V range.
2. Place
the Model
236/237
in
OPERATE and, using
a
pencil, record
the voltage
measurement
in
the
space
provided
below.
v+bAvbA
<15O.tV
14

Keithley 236 Specifications

General

Brand	Keithley
Model	236
Category	Measuring Instruments
Language	English