OPERATOR'S MANUAL
WBc
DCM-30
Open
circuit
volts:
3,0Vdc
typical
Audible
indication:
30mV
Overload
protection:
500V C
or
AC
rms
indicated
in
the
display
is
the
measured
value
of
resis-
tance.
In
continuity
test,
the
beeper
sounds
continuously,
if
the
resistance
is
less
than
302.
WARNING
SPECIFICATIONS
with
Display:
3%
digit liquid erystal display (LCD
maximum
reading
of
1999.
olariy
Automatie,
positive
implicd,
ncgative
pomy
The
accuracy
of
the
functions
might
be
slightly affected,
when
exposed
to
a
radiated
electromagnetic
field
envi-
ronment,
eg,
radio,
telephone
or
similar
AC
CURRENT
DIGITAL
Clamp-On
METER
indicatio.
Range
Accuracy
Overlaod
Overrange:
(OL)
or
(-OL) is displayed.
Zcro:
Autonmatic.
Low
battery
indication:
The
is
displaycd
when
nc
battery voltage drops
bclow
the
opcrating
levc.
IeAsurcment
rate:
2.5
times
per
second,
nominal.
Opcrating
Environment:
0°C
to
40°C
at
<
70%
R.H.
Storage
Temperature:
-20°C
to
60°C,
0
to
80%
R.H.
with
battery
removed
from
meter.
Protection
50/6011z
(1.5%
rdg +4dgts)
40-50011z
(3.5%
rdg
5dgts)
1090Aac
max
200A
Frequency
Measurements
1.
Sea
the Function/Range switch to the
"HZ
position.
2.
Connect
the
red
test
lead
to
the
"VN"
jack
and
the
black
test
lead
to
the
"COM
jack.
3.
Connect
the
test
leads
to
the
point
of
measurement
and
read
the
frequency
from
the
display.
20A/600
A
50/60Hz
(3.5%o
rdg
+
4dgts)
140-500Iz
(5.5%
rdg
*
5dgts)
for
I
minute
OPERATION
ACCuracy:
Stated
accuracy
at
23°C
:
5°C,
<75%
R.H.
Power:
Single
standard
9-volt
battery.
NEDA
I
604,
JIS
006P.
IEC
6F22.
Bclore
taking
any
measurcments,
read
the
Safety
In-
ormation
Section. Always examine the instrument for
damage, contamination (excessive dirt, grease, etc.) and
delects. Examine the test leads for cracked or frayed insu-
lation.
If
any
abnormal
conditions
exist
do
not
attempt
to
make
any
measurements.
Diode
Tests
1.
Connect
the
red
test
lead
to
the
"VN"
jack
and
the
black
test
lead
to
the
"COM
jack.
2.
Set
the
Function/Rangeswitch to the position.
3.
Turn
off
power
to
the
circuit
under
test.
4.
Touch
probes
to
the
diode.
A
forward-voltage
drop
is
about
0.6V
(typical
for
a
silicon
diode).
5.
Reverse
probes.
If
the
diode
is
good,
"OL"
is
displayed.
If
the
diode
is
shorted,
*.000"
or
another
number
is
dis-
played.
6.
If
the
diode
is
open.
"OL"
is
displayed
in
both
direc-
Battery
life:
200
hours
typical
with
carbon-zinc.
Dimensions:
192mm
(H) x
82mm
(W)x
33mm
(D).
Weight: Approx. 9.4 oz. (270g) includingbattery.
Accessories:
One
pair
test
leads,
9V
battery
(installed)
METER
MAX
DATA
HOLD
Button:
DC
VOLTS
Ranges:
200V,
600V
Resolution:
100mV
Press
(MAX
DATA)
button
to
toggle
in
and
out
of
MAX
DATA
Hold mode,
In
the MAX DATA Hold
mode
the
"MAX
annunciator
is
displayed.
The
MAX
hold
function
is
disable
in
the
frequency
count
mode,
but
the
MAX
annunciator
is
still
displayed.
Accuracy:
+(2.5%
rdg
+
1dgt)
on
200V
range
+(4.0%
rdg
+
1dgt)
on
600V
range
tions.
Input
impedance:
10MS2
Overload
protection:
600V
DC
or
AC
rms
7.
If
the
junction
is
measured
in
a
circuit
and
a
low
reading
is obtained with both lead connections, the junction may
be
shunted
by
a
resistance
of
iess
than
1k
In
this
case
Voltage
Measurements
1.
Connect
the
red
test
lead
to
the
"VQ"
jack
and
the
black
test
lead
to
the
"COM"
jack.
2.
Set
the
Function/Range
switch
to
the
desired
Voltage
type
(AC
or
DC)
and
range.
If
magnitude
of
voltage
is
not
known,
set
switch
to
the
highest
range
and
reduce
until
a
satisfactory
reading
is
obtained.
3.
Connect
the
test
leads
to
the
device
or
circuit
being
AC
VOLTS
(50Hz-500Hz)
Ranges:
200V,
600v
Resolution:
100mV
the
diode
must
be
disconnected
from
the
circuit
for
ac-
SAFETY
INFORMATION
curate
testing.
The
following
safety
information
must
be
observed
to
insure
maximum
personal
safety
during
the
operation
at
this meter
Accuracy:
(1.5%
rdg
+
4dgts)
on
200V
range
+(3.0%
rdg+
4dgts)
on
600V
range
MAINTENANCE
Input
impedance:
10MO
Overload
protection:
600V
DC
or
AC
rms
WARNING
measured.
1.
Do
not
use
the
meter
if
the
meter
or
test
leads
look
4. For dc, a (-)
sign
is
displayed
for negative polarity.
positive
polarity
is
implied.
Remove test leads before changing battery
or
perfoming
any
servicing
damaged,
or
if
you
suspect
that
the
meter
is
not
operat-
ing properly.
2.
This
meter
is
not
recommended
for
high
voltage
indus-
trial
use,
for
example
not
for
measurements
of
440VAC
or
600VAC
industrial
power
mains.
The
unit
is
intended
for
use
with
low
energy
circuits
to
600VDC
or
600VAC
or
high
energy circuit to
250V
AC or
DC.
Accidental
misuse
by
connection
across
a
high
voltage,
high
energy
power
source
when
the
meter
is
set
up
1or
mA
meas-
urement
may
be
very
hazardous.
3.
Turm
off
power
to
the
circuit
under
test
before
cutting,
unsoldering,
or
breaking
the
circuit.
Small
amounts
of
current
can
be
dangerous.
4.
Use
caution
when
working
above
60V
dc
or
3OV
ac
rms.
Such
voltages
pose
a
shock
hazard.
S.
When
using
the
probes,
keep
your
fingers
bchind
the
finger
guards
on
the
probes.
Measuring
voltage
which
exceeds
the
limits
of
the
mul-
timeter
may
damage
the
meter
and
expose
the
operator
to
a
shock
hazard.
Always
recognize
the
meter
voltage
limits
as
stated
on
the
front
of
the
meter.
RESISTANCE
Battery Replacement
Poweris
supplied
by
a 9
volt
"transistor
battery.
(NEDA
1
604,
IEC
6F22).
The
"
appears
on
the
LCD
display
when
replacement
is
needed.
To
replace
the
battery.
remove
the
one
screw
from
the
back
of
the
meter
and
ift
off
the
battery
case.
Remove
the
battery
from
battery
con
Ranges:
2KQ,
200KS2
Resolution:
12
Current
Measurements
I.
Set
the
Function/Range
switch
to
the
highest
600A
ac
Accuracy:
+(1.5%
rdg
+ 1
dgt)
Open
circuit
volts:
0.3Vdc
Overload
protection:
S00V
DC
or
AC
rms
range.
2.
Press
the
trigger
to
open
transfomer
jaws
and
clamp
onto
one
conductor
only.
Read
the
current
directly
on
the
display.
It
is
recommended
that
the
conductor
be
placed
at
the
center
of
the
closed
jaws
for
maximum
tacts.
CONTINUITY
Audible
indication:
less
than
3002
on
2KS2 range
for
accuracy.
3.
When
the
reading
is
lower
than
200
counts,
set
the
range
switch
to
the
next
lower
range
position.
For
maximum
actual
values
Overload
protection:
500V
DC
or
AC
rms
accuracy,
sclect
the
lower
range
posSible
without
over
ranging
the
meter.
FREQUENCY
(Autoranging)
Ranges:
2KHz,
20KHz
Accuracy:
+(0.5%
rdg
+
3dgts)
Sensitivity:
80Vrms
min
Resistance
and
Continuity
Measurements
I.
Set
the
Function/Range
sWitch
to
the
desired
resistance
Overload
protection:
500V
DC
or
AC
rms
(5OHz-500Hz)
range
or
continuity
position.
2.
Remove
power
Irom
the
cquipment
under
test.
3.
Connect
the
red
test
lead
to
the
*V2°
jack
and
the
black
test
lead
to
the
"COM"
jack.
4.
Touch
the
probes
to
the
test
pounts.
In
ohms,
the
value
DIODE
TEST
Test
current:
1,0mA
+
0.6mA
Accuracy:
(5.0%
rdg
+
3dgts)
