ESI 250-DA - Capacitor Measurement Adjustment and Calculation

2.4.1
MEASURING
CAPACITORS
(cont.)
SET
THE
MAIN
DIAL
TO
READ
These settings
make it
easier to
3^000
the correct
range.
SET
THE
D-Q
DIAL
TO
READ
0
SET
THE
DETECTOR
SWITCH
TO
This
connects
the
detector
to the
AC
OR
EXT-DET
bridge.
SET
THE
GENERATOR
SWITCH
TO
This
connects
the
generator to
INTERNAL
AC
the bridge
ADJUST
THE
MULTIPLIER
SWITCH
This
sets
the range
so
that
the value
FOR
MINIMUM
DETECTOR
SIGNAL
can
be
found with
maximum
reso-
lution on
the main
dial.
The
AMP
and
OSC
controls can
be
changed to
give
optimum
sensitivity.
ADJUST
THE
MAIN
DIAL
AND
THE
If
more
or
less
sensitivity
is
needed,
D-Q
DIAL
ALTERNATELY
FOR
adjust
the
AMP
control
and/or
the
THE
WIDEST
AND
SHARPEST
POS-
OSC
control.
SIBLE
SHADOW
ON
THE
NULL
INDICATOR
IF
THE
MAIN
DIAL
READING
AT
This
takes
advantage
of
the
increased
BALANCE
IS
LESS
THAN
1.200,
resolution
near
full
scale
of
the dial.
USE
THE
NEXT
LOWER
SETTING
OF
THE
MULTIPLIER
SWITCH
AND
READJUST
FOR
A
NULL
THE
MEASURED
CAPACITANCE
IS
THE
PRODUCT
OF
THE
READ-
INGS
OF
THE
MULTIPLIER
SWITCH
AND
THE
MAIN
DIAL
AT
1 KC,
THE
MEASURED
D
IS
THE
PRODUCT
OF
THE
READ-
INGS
OF
THE
CIRCUIT
SELECTOR
SWITCH
AND
THE
BLACK
SCALE
OF
THE
D-Q
DIAL
BEFORE
DISCONNECTING
THE
This
disconnects
the
generator.
CAPACITOR,
SET
THE
GENERATOR
SWITCH
TO
EXT
GEN
SET
THE
AMP
SWITCH
TO
OFF
This turns
off the
power
supply.
BEFORE
LEAVING
THE
BRIDGE
FOR
OTHER
FREQUENCIES:
The
measured
D
is
the
product of
(CIRCUIT
SELECTOR
switch
setting)
x
(D-Q
DIAL
reading)
x (fj^^
).
leisi
n
250-DA
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