DIGITAL MULTIMETER
OPERATION MANUAL
WARNING
To avoid electric shock or injured
or damage the instrument, please
read the manual carefully before
operation.
Ⅰ
. SAFETY RULES
This series meter meets the
standard of IEC1010. Read it
before operation.
0
1
．
Check the case of the meter
and test leads before operation.
2
．
Do not input over range when
testing.
3. Be careful when measuring
voltage over ACV 40V or DCV
60V.
4
．
When measuring, must select
correct function and range.
5
．
The test lead should be keep
away from the tested point when
change the function.
6. Do not try to modify the circuit,
Or you may damage the instrument
1
and endanger personal safety.
7. Safety symbols
“ ” exists high voltage , “ ”
dual insulation ,“ ” warning
8
．
Electric symbols
“ ”GND
， “ ”
low battery
“ ” AC “ ” DC “
”continuity test “ ”diode “
”relative value measurement
“ ”auto range
II.KEY FUNCTION
1.REL: press this key ,readings
2
back to zero , enter into relative
measurement ,LCD display “
” symbol, press it again, out from
the relative value measurement
function .when at Hz range, can
switch to frequency or duty cycle
(0.1~99.9%) measurement mode.
2.RANGE key :selecting operation
mode of auto range or manual
range .the default mode of this
meter is auto range , LCD display“
” symbol, press this key will
change to manual range, press it
3
one more time to increase a new
range, from low to high cycle in
turn .press the key for more than 2
seconds, will back to auto range
mode.
Ⅲ
. SPECIFICATION
3-1
．
GENERAL
3-1-1
．
Displaying : LCD
displaying
3-1-2
．
Max. indication: 3999
（
3
3/4
）
, auto polarity indication
3-1-3
．
Measuring method: dual
slope A/D transfer
4
3-1-4
．
Sampling rate: approx. 3
times/sec
3-1-5
．
Over range indication:
displays “OL”
3-1-6
．
Low battery indication: “
” symbol displays
3-1-7
．
Operation: (0
～
40)℃
，
relative humidity <80%
3-1-8
．
Power
：
2×1.5V battery
3-1-9
．
Meas.:124×80×20 mm
3-1-10
．
Weight: approx.
140g
（
including battery
）
3-1-11. Accessories: instruction
manual, gift box and battery
5
3-2
．
TECHNICAL DATA
3-2-1
．
Accuracy: ±
（
RDG
×a
%
+ digit
）
at (23±5) ,<75%RH℃
one year guarantee from
production date
3-2-2
.DCV
RANG
E
ACCURACY RESOLUTION
400mV
±(0.5%+4)
0.1mV
4V 1mV
40V 10mV
400V 100mV
600V ±(1.0%+4) 1V
6
Input resistance
：
10MΩ
Overload protection: 400Mv
range:250V RMS
＜
10seconds ;other
ranges 600VRMS
＜
10seconds .
3-2-3. ACV True RMS
Measurement
RANGE ACCURACY RESOLU7TION
400mV ±(1.5%+6) 100μV
4V
±(0.8%+6)
1mV
40V 10mV
400V 100mV
7
600V ±(1.0%+6) 1V
Input resistance: 10MΩ
Overload protection: 400mV
range: 250V RMS
＜
10seconds(manual range only).
Other ranges 600VRMS
＜
10seconds.
Frequency response: Sine wave
and triangular wave :
(40~1000)Hz, other waveform:
( 40~400)Hz
Displaying: True RMS response
8
3-2-4. CONTINUITY TEST
Overload protection: 250VRMS
Warning: do not input voltage at
this range.
Range Display Test Condition
Buzzer
sound at
less than
(50±30)Ω
OCV: about 0.5V
9
RANGE
DISPLAYING
VALUE
TEST
CONDITION
Forward
voltage drop
of diode
Forward
DCA is
approx.
0.5mA
，
bac
kward
voltage is
approx. 1.5V
10
3-2-5. DIODE
Overload protection:250VRMS
Warning: do not input voltage at
this range.
3-2-6.
RESISTANCE
（Ω）
RANG
E
ACCURACY RESOLUTION
400Ω ±(0.8%+5) 0.1Ω
4kΩ
±(0.8%+4)
1Ω
40kΩ 10Ω
400kΩ 100Ω
4MΩ 1kΩ
40MΩ ±[1.2%+ 5] 10kΩ
11
OCV: more than 400mV
Overload protection: 250VRMS.
NOTE: At 400Ω range, you should
make the test leads short to
measure the wire
resistance, then, subtracts
from the real measurement.
3-2-7
. CAPACITANCE
RANG
E
ACCURACY RESOLUTION
4nF ±(5.0%+40) 1pF
40nF ±(3.5%+8) 10pF
400nF 100pF
12
4uF 1nF
40uF 10nF
2000uF ±(5.0%+8) 100 nF
Overload protection: 250VRMS
Warning: do not input voltage at
this range.
3-2-8. Frequency(Hz/DUTY)
Range Accuracy Resolution
100Hz ±(0.5%
+4)
0.01Hz
1000Hz 0.1Hz
10kHz 1Hz
100kHz 10Hz
1MHz 100Hz
13
10MHz 1kHz
Input sensitivity: 3V Vp-p ( range
10MHz: more than 3.5V Vp-p)
Overload protection: 250V DC/AC
peak value.
Ⅳ
. OPERATION
4-1
．
DCV MEASUREMENT
4-1-1. Set the knob to a proper “V”
range.
4-1-2. The default mode of this
meter is auto range , LCD
display“ ” symbol, press
14
“RANGE” key change to
manual range, it can select the
range of
400mV,4V,40V,400V,600V.
4-1-3
．
connect the
test lead to the circuit under
tested, the voltage and polarity
of the point which the red test
lead connect to will shown on
LCD.
NOTE:
1
．
If LCD displays “OL” when
you use manual range, it
means over range, should set
15
the knob to a higher range.
2
．
Do not input voltage over DC
600V, or, the circuit might be
damaged.
3
．
Be careful when measuring
high voltage circuit.
4-2
．
ACV MEASUREMENT
4-2-1. Set the knob to a proper “V”
range.
4-2-2. The default mode of this
meter is auto range , LCD
display“ ” symbol, press
“RANGE” key change to
manual range, it can select the
16
range of
400mV,4V,40V,400V,600V.
4-2-3
．
Connect the
test lead to the circuit under tested,
the voltage value of the two point
which the test lead connect to will
shown on LCD.
NOTE:
1
．
If LCD displays “OL” , it
means over range, should set
the knob to a higher range.
2
．
Do not input voltage over
600V
，
or, the circuit might be
damaged.
17
3
．
Be careful when measuring
high volt circuit.
4-3
．
CONTINUITY TEST
4-3-1. Set the knob to “ ”
range.
4-3-2.Apply test leads to two
points of tested circuit, if the
inner buzzer sounds, the
resistance is less than
(50±30)Ω.
NOTE:
Do not input any voltage at this
range .
4-4
．
DIODE MEASUREMENT
18
4-4-1.Set the knob to “
”
range,
4-4-2.Positive measurement:
connect the red test lead to
the anode terminal and the
black one to the cathode
terminal of the diode under
tested. The LCD will
display the approx value of
the diode forward voltage
drop.
4-4-3.Reverse measurement:
connect the red test lead to
19
the cathode terminal and the
black one to the anode
terminal of the diode under
tested. The LCD display
“OL”.
4-4-4. Diode testing including
positive and reverse
measurement, if not in
conformity with the above
test result, means the diode
is damaged.
4-5.RESISTANCE
MEASUREMENT
4-5-1.Set the function knob to
20
“
Ω
”
range, connect test
leads crossly to the resistor
under tested.
4-5-2.Press the “RANGE” key to
select the mode of auto/manual
range
4-5-3. If the measured resistance is
low ,it should make the
test leads short, press the
“ ” key once, then
measure the resistance.
NOTE:
1
．
When use the manual range
21
measurement mode, if have no
idea of the measured
resistance range beforehand,
should set the range knob to a
higher one.
2
．
If resistance is over selected
range value, “OL” displays,
should set the knob to a higher
range. When measuring value
is over 1MΩ, the reading will
take a few seconds to be
stable, it’s normal for high
resistance measuring.
3
．
When input terminal is in
22
open circuit, overload display
“OL”
4
．
When measuring in line
resistor, be sure that power is
turned off and all capacitors
are released completely.
5
．
Do not input any volt at this
range.
4-6.CAPACITANCE
MEASUREMENT
4-6-1.Set the function switch to
“
”range.
4-6-2.I f the LCD displayed value
23
is not zero ,press “ ” key
back to zero.
4-6-3.Apply the test lead to the
capacity polarity (red test
lead polarity is “ +” ,the
black test lead polarity is
“
—”
), the LCD will display
capacity value .
NOTE:
1
．
Do not input voltage and
current at this range .
2
．
Press the “ ” key to make
24
the displayed value back to
zero to ensure the accuracy of
the measurement.
3
．
The operation mode is auto
range only at this range .
4
．
When measure the high-end
signals over 80% at 4nF
range, will automatic convert
range.
5
．
Release the capacitor
completely before measuring.
6
．
The input reading stability is
over 15 seconds at 2000 μF
4-7.FREQUENCY
25
MEASUREMENT
4-7-1.Set the range knob to
“Hz/DUTY” ,connect the
test lead to the circuit under
tested .
4-7-2.Press the “ ” key to
switch frequency and duty
circle,LCD display the
readings of frequency and
duty circle under tested .
NOTE:
1. The operation mode is auto
range only at this range .
26
2. In noise environment, should
better use the shielded cable
when measure the small
signal.
3. Do not touch the high voltage
circuit.
4. Do not input the value over
DC 250V or AC peak value to
avoid damage the instrument.
4-8.AUTO POWER OFF
After stop working for 15
minutes, the meter will be
into sleep mode. If the meter
into auto power off mode,
27
should switch the knob to
“off” range to restart the
power.
Ⅴ
. MAINTANENCE
Do not try to modify the circuit.
1. Keep the meter away from
water, dust and shock.
2. Do not store and operate the
meter under the condition of
high temperature, high
humidity, combustible,
explosive and strong
magnetic place.
3. Wipe the case with a damp cloth
28
and detergent, do not use
abrasives and alcohol.
4. If do not operate for a long time,
should take out the battery
to avoid leakage.
4-1. When signal displays,
should replace the battery
following the steps:
4-1-1. Unlock the button and
remove the battery case.
4-1-2. Take out the old battery and
replace the new one. It's
better to use alkaline
battery for longer life.
29
4-1-3. Fit on the battery case and
lock the button.
4-2. Fuse replacement
Use the same type fuse as
specified.
6. TROUBLE SHOOTING
If the meter does not work
30
properly, check the meter as
following:
CONDITIONS
WAY TO
SOLVE
NO
DISPLAYING
●
The power
is not turned
on
●
replace
battery
symbol
displays
●
replace
battery
BIG ERROR
●
replace
battery
31
●
The specifications are
subject to change without
notice.
●
The content of this
manual is regarded as
correct, error or omits
Pls. contact with factory.
●
We hereby will not be
responsible for the
accident and damage
caused by improper
operation.
●
The function stated for
this User Manual cannot
32
be the reason of special
usage.
601E-0921-000D
33
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