NOTE: The instrumenf should never
be grounded for
dynamic
checking.
It Is Imporfanf to realize that if "Quick>Check"
guali*
tativ© tests are
run
first.
It
will often
be unnecessary
to
make the more tedious quantitative
checks, as defective
units often may thus be spotted
without disconnecting
them.
READJUSTMENT
OF THE pUICK-CHECK SECTION
OF THE MODEL CE EXAM-ETER
Due
to
rough handling
in
shipment, the
Quick-Check sec-
tion of the Capacitor Exam-eter
sometimes goes out of
adjustment. Improper adjustment will be Indicated by
one
or
more of the
following conditions.
1. it is impossible to set the meter on the null
position.
The meter will give an indication somewhat less than
5.0 ma. even when the voltage
control
is set at
maximum.
2.
When the meter
Is
adjusted to the null position
(5.0
ma.) It will indicate a value
slightly greater than
5.0
ma. when either one of the test prods are
grounded or touched by the hand.
3.
Lack of sensitivity: that Is, the
Instrument will give
no
Indication on low capacities. The Quick-Check
circuit should check all capacities
from
75
mmf. and
above.
The Quick-Check circuit of the analyzer can be read-
justed very simply.
The procedure
to be
followed for
readjustment
is as
follows:
Set the
analyzer for dynamic checking and Insert
the test
leads Into the tip jacks. Do not short the
test clips
together. Now take the "red" test clip
in one hand and adjust the voltage control so that
meter
deflection Is 5.0 ma.
Now release
the red test lead
and adjust the trim-
mer control
through the hole in the side of the case
just
below the condenser test
terminals
to
the point
where the
meter deflection changes sharply from
a value less than 5.0 ma. to 5.0 ma.
Proper adjustment of the analyzer
will be realized
when
the
following conditions are fulfilled:
First, the meter
deflection
can be
readily
set at 5.0
ma. and will not vary when the red test clip Is held
in the hand.
Secondly, the
meter
reading will decrease from 5.0
ma. to a somewhat lower value when 70
to
100
mmf. condenser Is connected across
the test clips.
10
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