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Micronta 22-214A - Making Measurements; Resistance Measurements

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Making
Measurements
Resistance
Measurements
V-0-A
jack.
WARNING:
DO
NOT
APPLY
VOLTAGE
TO
TEST
LEADS
WHEN
THE
RANGE
SWITCH
IS
IN
OHMS
POSITION.
BEFORE
TAKING
ANY
RESISTANCE
MEASUREMENTS,
DISCONNECT
POWER
TO
THE
UNIT
UNDER
TEST
AND
DISCHARGE
THE
CAPACITORS.
It
is
best
to
remove
any
batteries
(from
unit
under
test)
and
unplug
line
cords.
1.
Plug
the
black
lead
into
©
COM
and
the
red
lead
into
@
2.
Leave
the
range
doubler
switch
in
the
V-0-A
position.
THE
RANGE
DOUBLER
SWITCH
MUST
BE
LEFT
IN
THE
V-
-A
POSITION
FOR
ALL
RESISTANCE
MEASUREMENTS.
3.
Set
the
range
switch
to
one
of
the
OHMS
positions.
20
Making
Measurements
4.
Touch
the
test
probe
tips
together
and
adjust
the
OHMS
ADJ.
control
to
bring
the
pointer
to
“O"
on
the
top
(green)
OHMS
scale.
If
you
cannot
adjust
the
pointer
to
“0”
on
the
OHMS
scale
when
you
short
the
test
leads
together,
replace
the
battery
with
a
new
one.
When
you
are
unable
to
adjust
the
pointer
to
0"
on
the
OHMS
scale
in
the
R
X
1,
R
X
10,
or
R
X
1K
positions,
the
1.5V
penlight
battery
must
be
replaced.
When
you
are
unable
to
adjust
the
pointer
to
“0”
on the
OHMS
scale
when
in
the
R
X
10K
position,
replace
the
9-
volt
battery.
See
“REPLACEMENT
OF
BATTERY/FUSE.”
21

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