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Maintenance
WARNING
Model
1920
3-8
STEP
1
2
*AUJU
3
4
5
6
Some procedures
require
the
use of
high
voltage.
Take care
to
prevent
contact
with
live
circuits
which
could
cause
electrical
shock
resulting
in
injury
or death.
R42G
R406
C412
Model
1920 Calibration
Adjustments
TABLE 3-4
Model
1920
Installed
in
the
192
Calibration
Procedure
KANtiE
FWCTIUN
APPLIEU INPUT
AUJIJSTMENT
KEAUINti
2
ACV + KY
1.lllllloov
UC
*Calibrator
I.UOOOO ?lO counts
2
ACV + UCV
-1.UOUUUV UC
*K411
l.UOOUU QO counts
I
I
KNT:
Adjust
the UC calibrlator
until
the display
reads
1.00000
+I0 digits.
leads
and take
note of the
reading.
Keverse
th
Adjust
K411 to l/Z
the difference
(Example:
Keadiny
is l.U04lJU,
adjust
K411 to read 1.00200).
?peat Steps
and 2 until
there
is < 10 digits
change
in reading
from + to -.
ACV
l.UlxlUUV
AC
at SUUtir
ACV
.llJlJUlJV AC
INepeat Steps
4 and 5 until
they
K407
1.00000
?lO counts
K4Z6
.lOOOlJ i-10 collnts
are within
tolerance.
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