Keithley 236 Service Manual

SECTION
1
Performance
Verification
1
58
1
OOmA
Measure
Range
7. Verify that the current reading
(b)
on the
Model
Verification
236/237 jS
Within the
following
limits:
Set
up the equipment
as shown
in
Figure
1-8. The
1O2
re
sistor
(R-18540)
is installed
in the
test
sockeL
I =
Io
±6pA
8.
Set the
calibration source
to
output
+9OmA.
This
procedure
requires
the
characterized value
of the
9.
Record
the
voltage
from the
Model 193A
and
calcu
1O2 resistor for current
caiculations. The characterized
late the
actual
current.
value
of
this resistor
was previously recorded
in
step 43
of paragraph 1.5.1. Transfer
that
resistance
value
to
the
V+9A —
______________
V
space
provided
below:
V+9QmA
R —
I+9OmA
=______________________
mA
10
_____________________________
Rion
Perform
the
following
steps to
verify the lOOmA
meas
urement
rance
1O•
Velif)7
that the
current reading
(I)
on the
Model
c‘
236/237
is within
the
following
limits:
1. While
in
standby, set
the
Model
236/237
to
source
OV
on
the 1.1V source range, and
set
compliance
to
lOOmA.
1236
I+9OmA
±((O.0008)
I+9OmA
+6.tA}
2.
Set
the Model
193A
to the 2V
dc
range.
3,
Zero
the Model 193A
by shorting
its input (VOLTS
ii.
Set
the
calibration source
to
output
—9OmA.
HI to
LO),
and enabling ZERO.
12.
Record
the
voltage
from the Model 93A
and calcu
4, Remove
the short
from
the
input of
the Model
193A
late the
actual current.
and
set the
calibration
source
(Models
343A
and
2500E)
to
output OmA.
5.
Place
the Model
236/237
in
operate and
record the
v 90
=
______________
v
voltage measurement from the
Model 193A
in the
space below:
V- 9 OmA
L-9OmA
=______________________
inA
Rio
VOrnA=
v
13.
Verify
that
the
current
reading
(b)
on
the Model
6.
Caiculate
the
actual
current
through
the resistor as
236/237 iS within the following
limits:
follows:
VoA
1236
I-9OmA
±((O.0008)
I-omj
+6i.tA}
IOmA=
=___________
mA
RioQ
14. Place the
Models 343A and
236/237 in standby.
1-18

Keithley 236 Specifications

General

Brand	Keithley
Model	236
Category	Measuring Instruments
Language	English