Fluke 732a - 4 Precision Divider

732A
ADJUSTABLE
SOURCE
PRECISION
DIVIDER
NULL
DETECTOR
732A
UUT
NOTE;
MOVE
1.018V ON
UUT TO
1V
FOR 1V
CALIBRATION.
Figure
4-8.
Calibration
of
1.081V (and IV)
to
732A
Procedure
‘A’
14.
Verify
the null.
15.
Set the
Presicion
Divider ratio
switches to
0.1000000.
16.
Transfer
the Null
Detector
input
lead
from the
1.018V terminal
to
the IV
terminal
on the UUT.
1 7.
Set
the
RANGE
control
on the
Null
Detector
to
the 3
volt
position.
Adjust
the
IV
calibration
potentiometer
on
the
UUT
while
decreasing
the
RANGE
setting
on
the
Null
Detector
to
obtain
a
null
on
the
3
fxV
range.
Use
the
non-conducting
adjustment
tool.
18.
Verify
the
null.
19.
If
the
IN
CAL
indicator
is
illuminated,
proceed
to
step
20.
If not,
connect a
short
wire to
one of
the
front
panel
COMMON terminals.
Momentarily
touch the
other end of
this
wire to the
circuit
board
behind
the
RESET
hole. The IN CAL
indicator
should
illuminate.
20.
Calibration
is
complete. Record all test
results.
Disconnect
all test
equipment. Cover
the
output
adjustment
access
holes and the
RESET
hole
with
tamper-proof
calibration seals.
4-39.
Procedure
B:
Calibration
to Standard
Cells
4-40. Use
the
following
procedure
to
standardize
the
output
of
the
732A.
Set the
Null
Detectorto ZERO
when
changing
leads
or
when
not
making measurements to
avoid
accidental
damage
to
the Standard Celts.
Observe
the
techniques
presented
in
Section 2 for minimizing
thermal
emf
errors.
4-10