Micronta 22-204C - Using Your Multitester; Battery Installation and Maintenance; Techniques for Accurate Readings; Pointer Zero Adjustment

USING YOUR
MULTITESTER
You'll
need one 9-volt battery
for the
20
Megohm range,
one AApenlight
cell for other
resistance ranges.
We recommend our
23-583/553 for 9V,
23-582/552
for AA. Remove
the back cover and install
batteries in
the
correct compartment.
Observe proper
polarity. Replace the back cover.
If you can't adjust the
pointer to
"0"
on the OHMS
scale, replace
the
battery with
a
new
one.
Remember:
Never leave weak or dead
batteries in your unit.
Even "leak-
proof" ones
may leak damaging
chemicals. Also, if
you are not going
to
use your unit for
a
week or more,
remove the batteries.
For
most accurate
readings,
keep
the meter lying
flat
on a non-metallic
surface.
Also, use
a
range
and range
doubler
switch
setting that
results in
a
reading
in the upper
1 /3rd
of the meter
scale.
To
read
the scale,
look
at it from the
point where
the pointer
and its reflec-
tion on the
mirror come
together;
otherwise,
the
parallax will cause
an
error in
the reading.
If the pointer
does not normally
rest
exactly over
"0"
at
the
left side
of
the scale,
adjust the
plastic
screw in the
lower center
of the meter
face to
bring
the
needle
to
"0."
Always
observe correct
test
lead polarity
when making
DC measurements:
black
into the
©
COM and red
into the
©
V-&-A
(or
©
DC 1000V or
©
DC
10A)
jacks.
The maximum
input limit
for voltage
and current
measurement
between
®
V-fi-A
and
©
COM
is 1 000V AC,
250V DC and
500mA
DC.
Exercise
extreme
caution when
measuring voltages
of 1 50 and
above.
When
not in use, always
leave
the range switch
in the
OFF position.
Use the range doubler switch as follows:
For resistance readings,
always
use the V-fi-A
position.
When using the
V-A/2 position for
all other
functions,
divide the
range
switch setting
by
2
and read
on an appropriate
scale. For
example: range
set to
250
AC
V and V-A/2
-
the
range is
125 volts (250 divided
by
2)
and you should read
the red scale,
following the
0 to 125 markings.
An-
other example: lead
in ©COM and
©DC 10A with range
set
to 10A
and
V-A/2
-
the
range
is 5
amperes
(10
divided
by 2)
and you
should
read the
black
scale,
following
the 0 to
50
markings.
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