Radio Shack 22-174A User Manual

CONTENTS
A
Word
About
Safety
...................
5
What
Does "True
RMS"
Mean?
...."...................
Z
Specifications
........
g
Special
PanelMarkings
..................
.................
14
Preparing
for
Operation
.............
15
lnstalling
Batteries
.................
15
Using Test
Leads
...........
.......
16
Making
Measurements
.................
...................
17
Turning
On
the Meter
...........
.......................
17
Understanding
Phantom
Readings
............
1T
Overrange
lndication
.............
jZ
Measuring
DC Voltage
.........
19
Measuring
AC
Voltage
.........
20
Measuring
an AC
Voltage
on a DC Bias
......................-...
21
Measuring
3-Phase AC
Voltages
_-...-----....-
22
Measuring
AC/DC
Current
......-......-_.........
23
Measuring
Resistance
.........
26
Checking
Continuity
........
29
Checking
Diodes
............-......
gO
Checking Transistors
..-.-......
92
Measuring
Frequency
..........
35
Measuring
Capacitance
--.....
97
Using
the Hold
Function
.......
38
Using the
Bar
Graph
.............
39
Manually
Selecting
the Range
...".....--........
39
Using
the Beep
Function
......-...........
.......... 40
Using
the Temperature
Function
.................
40
Maintenance
....... 42
Replacing
the Fuses
.............
42
Caring
lor the
Meter
...................
44
Lg
hSug
taken
every
precaution
in
designing
this
meter
to
en_
sure
that
it
is
as
safe
as
we
can.mat<e'it.
g"ui,
safe
op"i"fion
depends
qn
yqu,
the
operator.
We ,ecommbnd
you
follow
these
simple
safety
rules:
o
Never.apply
voltages
to
the
meter
that
exceed
the
limits
$:''
?Jffi
ffi3'[3'
!:il]"Jff
lRy,ii:n,X5:
l,?3fj
apply
more
than
500V
DC
or
500V
Ril,ts
A-C
dtu;;;;i
input
terminal
and
ground.
o
Use
extreme
caution
when
you
work
with
voltages
above
40V.
Atways
disconnect
power
from
tfrJ
circuii
t*
t;
measuring
before you
connect
test
leads
to tigh;tAJ
points.
o
Never
connect
test leads
to
a source
of
voltagb
when
yofr
select.
the
diode,
ohms,.
continuity,
crrrent
-reasurement,
capacitance,
or
hre
functions.
I
Always
discharge
filter
capacitors
in
the
power
supply
of
the
circuit
under
test
before you
attach
test leads.
o
flwqVs
turn
off
the
meter's power
and
disconnect
the
test
leads
before you
replace
thebatteriei
;ril;;.
o
Never.operate
the
meter
unless
the
battery
cover
is
in
place
and
fully
closed.
.
P::::"^lany
AC/DC
sets.have
a
potentiaily
hol
chassis,
?e_
sure
rhe
top
of
your
workbench
and
the
flo6r
underneath
tr
are
made
of
non_conductive
materials.
.f.fe rytJiryter
is.
fulty
catibrated
and
tested.
Under
normat
!lp-,_no,lrtllr"r
adjustment
is
necessary.
tf
the
meter
does
re.
eurr€
adjrrs1llg,
do not
try
to
adjust.it yourself.
Take
it
to
your
nearesl
Radio
Shack
store.
Service
Uy
unautfrorizeA
perso,nnet
voids
the
waranty.
A
WORD
ABOUT
SAFETY

Radio Shack 22-174A Specifications

General

Brand	Radio Shack
Model	22-174A
Category	Multimeter
Language	English