Sears 82413 - Page 9

1-2.
Remove the rear
cover
from
the instrument
by re-
moving three screws
and then
lift
off the cover.
DC
CAL
2-1. Slide
POWER
FUNCTION switch
to
"DC
f,i"
,
and
the RANGE
switch to 200mV
position.
2-2.
Set the
output of the calibrator 1
9OmV
!
0.02%
^nd
connect it to the
"V.A".
and
"COM"
inout
connec-
tors
of the instrument.
2-3.
Using
a
small
flat-tipped screw
driver, adjust poten-
tiometer
VR1
(DC,
ADJ) until multimeter
Digital
Display reads
exactly
190.0.
2-4.
Remove
the DC
calibrator output
from
multimeter.
AC CAL
3-1.
Slide
POWER/FUNCTION
switch to
"AC".
3-2. Set the output
of
the AC calibrator
for 190mV
t
0.057o
pwe
sine wave
at a
frequency
between 45
-
500
HZ,
and connect it to
the
'!V.d]"
and
"COM"
input connectors
of
the mulrimeter.
3-3.
Adjust potentiometer
VR2
(AC,
ADJ)
until display
reads
exactly 190.0.
CAPACITANCE CAL
4-1.2000pF
Slide
POWER/FUNCTION
switch to
"DC
O"
,
and
RANGE
switch to 2000 p position, Turn
the
"CAP
ZERO ADJ",
so that zero
reading on display.
Connect
100pF standard
capacitor to
CAP test
leads,
and
tur:n the VR3 so that 1000 reading
on display.
4-2. 2uF
Set the RANGE
switch
TO
2p position,
and
turn
the
"CAP
ZERO
ADJ"
so that zero
reading on
display,
connect 1pF
standard
capacitor
to CAP
test
leads,,and
VR6 so
that 1,000
reading
on display.
4-3.
20ttF
Set the
RANGE
switch
to
20trr position,
and turn
the
"CAP
ZERO
ADJ" so
thar zero
reading
on display.
Connect 1OpF
standard
capacitor
to CAP
test leads,
and turn
the VR5 so
that 10.00 reading
on display.
5.
TEMPERATURE
CAL
Slide POWER/FUNCTION
switch
to
,,DC
O',
,
and
RANGE
switch to Temp
position.
Set
the output
of the
calibrator
to
DC
0,798mV
!
0,02%
and connecr
it to
the
"V'O"
and
"COM" input connectors.
Adiust
VR7
until
display reads
exactly
680F
+
ambient
t"-pir"tur".
Example:
ambient temperature
is
770F
68"F+77oP=113oF
6, Set
the reat
cover
to the instrument
by tightening
three
screws.
icAtnloNl
The
calibration
procedures
should
be
perforrned
in regular
sequence.
Always DC
voltage
must
be adjusted
pdor
to
AC voltage
adjustment.
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