DIGITSL MULTIMETER
OPERATION MANUAL
The meter is a high performance, high accuracy, 3 3/4-digit, 32mm digit high by
LCD displaying meter. The function includes DCV, ACV, DCA, ACA,
resistance ,capacitance, frequency, temperature, duty cycle measurement, triode,
diode and continuity test. Also with the function of unit signal displaying ,relative
value measuring ,auto range/ manual range switch ,auto power off and warnin g
function etc.
SAFETY NOTES
The meter meets with IEC1010standard. Read the notes before operating.
① Before measuring, check the test leads carefully.
② Do not input a value over allowable limited when measuring to avoid electric
shock meter damage.
③ Be careful when measuring voltage over DCV60V, ACV40V.
④ To select correct function.
⑤ The test leads should be taken away from the testing point when changing
function.
⑥ Never take measurement when the test leads are in current terminal.
⑦ Do not try to modify the circuit.
⑧ Safety symbols
“ “ dangerous voltage
“ “ GND
“ “ dual insulation
“ “ refer to the operation manual
“ “ low battery
SPECIFICATION
1. General
1-1. Display: 3 3/4digit LCD with a max readings of 3999, Automatic negative
polarity indication.
1-2. Measuring method: Dual-slop integrating A/D converter system.
1-3. Sampling rate: Approx. 3times/second.
1-4. Over range indication: “ OL” display.
1-5. Low battery: The “
”is display.
1-6. Operating environment : Temperature (0 to 40 ), humidity<80%RH.℃℃
1-7. Storage environment: Temperature (-10 to 50 ), humidity<80%RH.℃℃
1-8. Power: 2pcs 1.5V AAA 7# battery.
1-9. Dimension: 185(L)X93(W)X35(H)mm.
1-10. Weight: Approx. 290g (including battery).
1-11. Accessories: manual, gift box ,holster ,TP01 temperature probe, test leads and 2pcs
1.5V battery.
2. Technical
2.1 Accuracy: ±(a% × reading + digits) at 23±5 ,<75%RH.℃
2.2 DCV
Ran
g
e Accurac
y
Resolution
400mV 0.1mV
4V 1 mV
40V 10 mV
400V
±(0.5%+4d)
100 mV
1000V ±(1.0%+4
d
)
1V
Input impedance: 400mv range>40MΩ,other range is 10MΩ.
Overload protection: 1000V DC or 700V AC peak value
2.3 ACV
Ran
g
e Accurac
y
Resolution
400mV ±(1.5%+6d
)
0.1mV
4V 1 mV
40V 10 mV
400V
±(0.8%+6d)
100 mV
750V ±(1.0%+6
)
1V
Input impedance: 400mv range>40MΩ,other range is 10MΩ.
Overload protection: 1000V DC or 700V AC peak value
Frequency response: 750V range: 40~100Hz, other range: 40~400Hz
Displaying: sinewave RMS(average value response)
2.4 DCA
Ran
g
e Accurac
y
Resolution
400uA 0.1μA
4000uA 1μA
40mA 10μA
400mA 100μA
4A
±(1.0%+5)
1mA
20A ±(2.0%+5
)
10mA
Max. measuring volt drop: 400mV under mA range, 200mV under A range.
Max. input current: 20A(less than 15sec.)
Overload protection: 0.5A/250V fuse, 13A/250V fuse.
2.5 ACA
Ran
g
e Accurac
y
Resolution
400uA 0.1μA
4000uA 1μA
40mA 10μA
400mA 100μA
4A
±(1.5%+5)
1mA
20A ±(2.0%+10
)
10mA
Max. measuring volt drop: 400mV under mA range, 200mV under A range.
Max. input current: 20A(less than 15sec.)
Overload protection: 0.5A/250V fuse, 13A/250V fuse.
Frequency response: 40~100Hz under 10A range, 40～400Hz at other range.
2.6 RESISTANCE
Ran
g
e Accurac
y
Resolution
400Ω ±(0.8%+5
)
0.1Ω
4kΩ 1Ω
40kΩ 10Ω
400kΩ 100Ω
4MΩ
±(0.8%+1)
1kΩ
40MΩ ±(1.2%+5
)
10kΩ
Open circuit voltage: 400mV.
Overload protection: 250V DC/AC peak value
2.7 CAPACITANCE
Ran
g
e Accurac
y
Resolution
4nF ±(2.5%+6
)1p
F
40nF 10pF
400nF 100pF
4μF 1nF
40μF
±(3.5%+8)
10nF
200μF±
(
5.0%+8
)
100nF
Overload protection: 250V DC/AC peak value
WARNING: do not input any voltage at this range! When measuring,
the capacitor should be completely released and the power must be
turned off.
2.8 FREQUENCY
Ran
g
e Accurac
y
Resolution
10Hz 0.001Hz
100Hz 0.01Hz
1000Hz 0.1Hz
10kHz 1Hz
100kHz
±(0.5%+4)
10Hz
1MHz 100Hz
30MHz 1kHz
INPUT SENSOR：0.7V。
Overload protection: 250V DC/AC peak value
2-9. hFE
Range Accuracy Test condition
hFE NPN or
PNP
0~1000 Current is 15uA, Vce is
approx. 4.5V
2.10 DIODE AND CONTINUITY TEST
Range Accuracy Resolution
Diode forward volt
drop
Forward DCV is approx.
0.5mA, reversed voltage is
approx. 1.5V
If the resistance of the
two tested points is
less than (70±10)Ω,
buzzer sounds.
Open circuit voltage: 0.5V
Overload protection: 250V DC/AC peak value
WARNING: do not input any voltage at this range.
2.11 TEMP.
Range Accuracy Resolution
-40℃-1000℃
＜400 ±(0.8%+4)℃
≥400 ±(1.5%+15)℃
1℃
Thermocouple: K type
WARNING: do not input any
voltage at this range.
OPERATION
4-1. panel description
1. LCD displaying
2. Function keys:
2-1.RST key: when the meter
under sleep or lock states,
press this key, the meter will
be actived.
2-2.Hz/DUTY key:when measuring the AC voltage or AC current, it can switch
frequency/duty cycle/voltage(currect),when measuring the frequency, it can switch
frequency/duty cycle(1-99%).
2-3.REL key: press this key, clear the reading to Zero, enter relative value measuring.
2-4:HOLD key: press the key, the present measuring value is held on LCD and
display“HOLD ”; press it again will exit the function and “HOLD” disappear.
2-5.Range key: select auto range or manual range.
2-6.DC/AC key,select DC/AC mode.
3.Knobe：change measuring function and range.
4.Temperature jack.
5.Voltage,Current,Resistance,Frequency,GND jack
6.Battery Case.
See the photo
4-2. DCV measurement
1 Insert the black lead to “COM” socket and the red one to “ VΩHz” socket;
2 Set the function switch to “V” range, press DC/AC key to select DC measuring
mode.
3.the default states is auto range, display”AUTO” symbol,press “range” key to select
manual range , you can choose 400mV、4V、40V、400V、1000V range.
4.connect the test leads to the test point ,voltage and polarity of the point which
connect with red test leads will be display on LCD.
NOTE:
1. If “OL” displays, it means over-range, should set the range knob to a higher
range.
2. The tested voltage can not be over 1 000V DC; when changing function and
range, the leads must be away from the testing point.
3. Be careful when measuring high voltage.
4-3. ACV measurement
1. Insert the black lead to “COM” socket and the red one to “ VΩHz” socket.
2. Set the function switch to “V” range, press DC/AC key to select AC measuring mode
3.the default states is auto range, display”AUTO” symbol,press “range” key to select
manual range , you can choose 400mV、4V、40V、400V、750V range.
4.connect the test leads to the test point ,voltage and polarity of the point which connect
with red test leads will be display on LCD.
NOTE:
1. The 400mV range only has the manual range,if you need to use
400mV range,press “RANGE” key to select this range.
2. If “OL” displays, it means over-range, should set the range knob to a
higher range.
3. The tested voltage can not be over 750V AC; when changing function
and range, The leads must be away from the testing point.
4. Be careful when measuring high voltage.
4-4. DCA measurement
1. Insert the black lead to “COM” socket and the red one to “mA” or “20A”
socket.
2. Set the function switch to “A” range, press DC/AC key to select DC
working mode,connect the test leads across to the circuit under tested,
the current value and polarity of the point which red lead connect will
display on LCD.
NOTE:
1. If the measured current is unsure beforehand, should set the range
knob to a higher range, then, switch to a proper range according to
the displayed value.
2. If “OL” displays, it means over-range, should set the range knob to a
higher range.
3. When tested current ≥10A under 20A range ,buzzer will be sound.
4. Max. input current is 400mA or 20A（subject to where red lead
insert），excessive current will blow the fuse. Be careful when
measuring 20A due to un-fused. Continuously measuring large
current may heat the circuit, affect the accuracy, even damage the
meter.
4-5. ACA measurement
1. Insert the black lead to “COM” socket and the red one to “mA” or “20A”
socket.
2. Set the function switch to “A” range, press DC/AC key to select AC
working mode ,connect the test leads across to the circuit under tested,
the current value and polarity of the point which red lead connect will
display on LCD.
3. If the measured current is unsure beforehand, should set the range knob to a
higher range, then, switch to a proper range according to the displayed value.
4. If “OL” displays, it means over-range, should set the range knob to a higher
range.
5. When tested current ≥10A under 20A range ,buzzer will be sound.
6. Max. input current is 400mA or 20A（subject to where red lead insert），
excessive current will blow the fuse. Be careful when measuring 20A due to
un-fused. Continuously measuring large current may heat the circuit, affect the
accuracy, even damage the meter.
4-6. Resistance measurement
1. Insert the black lead to “COM” socket and the red one to “ VΩHz” socket.
2. Set the function switch to “Ω” range, if the resistance under measured f
unknown, should set to a higher range.
3. press “Range ” key to select auto range or manual range mode.
4. If measuring the small resistance, should short-circuit at first, press “REL”
key,and then measuring the unknown resistane, it actual resistance will be
display on the LCD.
NOTE:
1. If the measured resistance is unsure beforehand, should set the range knob to
a higher range, then, switch to a proper range according to the displayed
value.
2. If “OL” displays, it means over-range, the range knob should be set to a
higher range.When the resistance is over 1MΩ, the reading should take a
few seconds to be stable. It is normal at high resistance measurement.
3. When input terminal is open circuit, “OL” displays.
4. When measuring in-line resistance, be sure the power has been turned off
and all capacitors are fully released.
5. Do not input voltage at this range.
4-7. Capacitance measurement
1. Set the function switch to “ ” range
2. Insert the black lead to “COM” socket and the red one to “ VΩHz” socket.
3. If the LCD isn’t display zero ,press “REL” key to clear zero.
4. Insert the capacitor to “Cx” socket according to the polarity, the value will
display on LCD.
NOTE:
1. Don’t input voltage and current signal in the “VΩHz” jack when measuring the
capacitor.
2. Be sure to press “REL” to clear zero before measuring.
3. Capacitance range only have auto range working mode.
4. Release the capacitors completely to avoid damaging the meter
5. 200uF range input reading steady large than 15 Sec,.
6. Unit: 1uF=1000nF 1nF=1000pF
4-8. Frequency measurement
1. Insert the black leads to “COM” socket and the red one to “VΩHz” socket.
2. Set the range switch to “Hz” range.
3. The range is auto-range. Connect the leads across to the signal under measured, the
value will be displayed on LCD.
NOTE:
1. There is only auto-range at this range.
2. When input is over 10V Ac rms, reading is possible, but maybe over-range.
3. It’s better to use shield cable when measuring small signals in noisy place.
4. Be careful when measuring high voltage.
5. Do not input voltage over 250V DC/AC peak value.
4-9. hFE measurement
1. Set the function switch to hFE range.
2. Define the transistor is NPN or PNP type, insert the emitter, base and collector
separately to the correct hole, the approx. value will be displayed on LCD.
4-10. Diode and continuity Test
1. Insert the black leads to “COM” socket and the red one to “VΩHz” socket( the polarity
of the red one is “+”).
2. Set the FUNCTION switch to “
” position. Press “ DC/AC ”key to
select diode measuring.
3. Forward measurement: connect the red test leads to the “+” polarity of the diode under
tested and the black one to “-“, the approx. forward voltage of this diode will be
displayed on LCD.
4. Backward measurement: connect the red test lead to the “-“ of the diode and the black
one to “+”, and LCD will displayed OL. The completely measurement includes
forward and backward measurement, if the result can not meet with the
above, it means the diode is workless.
5. Diode test include forward measurement and backward measurement, if
the result is different with above, the diode is bad.
6. press “DC/AC” key to select continuity test.
7. Continuity test: the buzzer sounds when the resistance under measured is
less than (70+10)Ω.
Note:
1. Do not input voltage at this range.
2. Turn off the power and release all capacitors when testing in line.
4-11. T emperature measurement
1. Set the function switch to “℃” range.
2. Insert the cold point of thermocouple too “Temp” socket and the working
point to the place wanted to take temperature, the value will be displayed
on LCD.
NOTE:
1. When the input terminal is in open circuit, will display the “ normal
temp.”
2. Do not change the thermocouple, or, the accuracy can not be secured.
3. Do not input voltage at this range.
4-12.DATA HOLD
Press “ HOLD” key once, the current data will be hold on LCD, press it
again, data is canceled.
4-13 Auto power off
1.When operating after 15 minutes, the meter will be auto power off and
into sleep mode; Press “POWER AUTO OFF” key twice can turn the power
on
2.press “DC/AC” key before turn on, it can cancel auto power off function.
MAINTENANCE
1. Do not try to modify the inner circuit.
2. Do not input a voltage over 1000V DC/AC peak value.
3. Do not measure voltage at current range, resistance range, diode and
buzzer range.
4. Do not use the meter if the battery is not replaced well or the battery case is not
fixed.
5. Before replacing battery or fuse, release the test leads from the test point and
turn power off.
6. Keep the multimember dry. Keep the multi-meter away from dust and dirt
7. Use and store the multi-meter only in normal temperature environments.
Temperature extremes can shorten the life of electronic devices, damage
batteries, and distort or melt plastic part.
8. Handle the multiyear gently and carefully. Dropping it can damage the circuit
boards and case and can cause the multi-meter to work improperly although the
holster can provide enough protection.
9. Wipe the multi-meter with a damp cloth occasionally to keep it looking new. Do
not use harsh chemicals, cleaning solvents, or strong detergents to clean the
multi-meter.
10. Take out off the battery if do not use for a long ti me. When LCD displays
“
”, the battery should be replaced.
a) Refer to pic.2 to take out the holster.
b) Remove the screw on the bottom case and lift the bottom case.
c) Remove the spent battery and replace it with a battery of the same
type.
11. Replace the fuse with same type and rating as the replacements.
If the meter does not work properly, check the meter as following:
CONDITIONS WAY TO SOLVE
NO DISPLAYING
Power is off
HOLD key
Replace battery
symbol displays Replace battery
BIG ERROR Replace battery
z The specifications are subject to change without notice.
z The content of this manual is regarded as correct, error or omits Pls.
contact with factory.
z We hereby will not be responsible for the accident and damage caused
by improper operation.
z The function stated for this User Manual cannot be the reason of special
usage.
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