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1
/
2
DIGITAL MULTIMETER OPERATION MANUAL
1. INTRODUCTION
This instrument is a high performance stability, battery operated, 3½ digital, 25mm high
character jumbo LCD reading to 1999 multi-meter with the function of measuring DC and
AC voltage, DC and AC current, Resistance and Capacitance, Diode and Continuity test,
data hold. The Dual-slop A/D converter uses CMOS technology for auto-zero, polarity
selection and over-range indication. Full overload protection is provided. Because of its
outstanding features, it is most suitable for use in production line, lab, R & D, maintenance
and repair work.
2. SAFETY NOTE
The meter meets the standards of IEC1010. Read the operation manual carefully before operation.
2-1
．
Do not input limit over-ranged.
2-2
．
The voltage below 36V is safety. To avoid electric shock, check whether the test leads
are connected correctly, whether the insulation is good when measuring over 36DCV or
25ACV.
2-3
．
Remove the test leads when changing function and range.
2-4
．
To select correct function and range, beware of error operation.
；
2-5
．
Do not operate the meter if battery case and back cover is not fixed.
2-6
．
Do not input voltage when measuring resistance.
2-7
．
Remove test leads from test point and turn off the power before replacing battery and fuse.
2-8
．
SAFETY SYMBOLS
“
”EXISTS DANGEROUS VOLTAGE
，
“
” GND
，
“
”DUAL INSULATION
“
”THE OPERATOR MUST REFER TO THE MANUAL
，
“
”LOW BATTERY
3.SPECIFICATIONS
3.1 GENERAL SPECIFICATIONS
3-1-1
．
Displaying: LCD displaying.
3-1-2
．
Max. displaying: 1999
（
3 1/2digit
）
auto polarity indication.
3-1-3
．
Measuring method: dual slope A/D conversion.
3-1-4
．
Sampling rate: approx. 3 times/second.
3-1-5
．
Over range indication: the MSD displays“1” or“-1”.
3-1-6
．
Low battery indication:“
” appears.
3-1-7
．
Operation environment: Temperature (0
℃
to 40
℃
), humidity<85%RH.
3-1-8. Storage environment: Temperature (-10
℃
to 50
℃
), humidity<85%RH.
3-1-9
．
Power
：
9V×1
（
NEDA1604/6F22 or equivalent model
）
.
3-1-10
．
Size: 155×90×48mm
3-1-11
．
Weight: approx. 270g
（
including battery
）
.
3.2 ELECTRICAL SPECIFICATIONS
Accuracy is
±
(percentage of r number of digit) at 23
±
5
℃
,<75%RH.
DC Voltage
Range Accuracy
Resolution
200mV 100uV
2V 1mV
20V 10mV
200V
±
(0.5%+3d)
100mV
1000V
±
(0.8%+5d)
1V
Input impedance
：
10M
Ω
Overload protection: 200mV range: 250V DC/AC RMS
2-1000V range: 1000V DC/AC RMS
AC Voltage
Range Accuracy
Resolution
2V 1mV
20V 10mV
200V
±
(0.8%+5d)
100mV
700V
±
(1.2%+5d)
1V
Input impedance : 10M
Ω
Overload protection: 1000V DC/700VAC RMS
Frequency response: 2V-200V range: 40-400Hz
700V range: 40-200Hz
Indication: Average (rms of sine wave)
DC Current
Range Accuracy
Resolution
20mA
±
(1.2%+3d)
10uA
200mA
±
(1.5%+3d)
100uA
10A
±
(2.0%+5d)
10mA
Max input voltage: 200mV
Max input current: 10A (up to 15 seconds)
Overload protection
：
Fast 0.2A/250V fuse, 10A/250V fuse.
AC Current
Range Accuracy
Resolution
20mA
±
(1.2%+5d)
10uA
200mA
±
(1.5%+5d)
100uA
10A
±
(2.0%+8d)
10mA
Max measuring voltage: 200mV
Max input current: 10A ( up to 15 seconds)
Overload protection
：
Fast 0.2A/250V fuse, 10A/250V fuse
Frequency response: 40-200Hz
Indication: Average ( rms of sine wave)
Resistance
Range Accuracy
Resolution
200
Ω
±
(0.8%+5d)
0.1Ω
2k
Ω
1Ω
20k
Ω
10Ω
200k
Ω
100Ω
2M
Ω
±
(0.8%+3d)
1kΩ
20M
Ω
±
(1.2%+8d)
10kΩ
Open circuit voltage: less than 3V
Overload protection: 250V DC/AC RMS
NOTE: at 200
Ω
range, the test leads should be short-circuit, and measure the down-lead
resistance, then, subtract from the real measuring.
WARNING: DO NOT input any voltage at resistance range for safety!
Capacitance
Range Accuracy
Resolution
20nF 10pF
2uF
1nF
200uF
±
(4%+10d)
100nF
Overload protection
：
36V DC/AC RMS
Diode Test
Range Description
Test
Condition
Forward voltage drop
of diode
Forward DC Current approx.
1mA. Reversed DC voltage
approx. 3V.
Buzzer sounds if
resistance
between terminals V/
Ω
a
nd COM is less than
about 30
±
20
Ω.
Open circuit voltage approx. is
3V
Overload Protection: 250V DC/AC RMS
4. OPERATION
4-1. FRONT PANEL DESCRIPTION
1.
LCD display: display measuring data and symbol
2.
DATA HOLD switch: press this key, “H” will display and the present value will be
hold on LCD.
3.
FUNCTION and RANGE switch: select the function and range
4.
test jack of current <200mA,capac” and temperature”-“ pole;
5.
test jack of 10A current and capacitance “-“ ;
6.
voltage and resistance test jack;
7.
GND and temperature “+” test jack;
8.
battery case
4-2. DC VOLTAGE MEASUREMENT
4-2- 1. Insert the black test lead to “COM” jack, the red one to V/
Ω
jack.
4-2-2. Set the range knob to a proper DCV range, connect the test leads across to the circuit
under tested, the polarity and voltage of the point which red lead connect will display on
LCD.
NOTE:
1.If the measured voltage is unsure beforehand, should set the range knob to the highest
range, then, switch to a proper range according to the displayed value.
2.If LCD displays “1”, it means over range, should set the range knob to a higher range.
4-3.AC VOLTAGE MEASUREMENT
4-3-1.Insert the black test lead to “COM” jack, the red one to V/
Ω
jack.
4-3-2. Set the range knob to a proper ACV range, connect the test leads across to the circuit
under tested.
NOTE:
1. If the measured voltage is unsure beforehand, should set the range knob to the highest range,
then, switch to a proper range according to the displayed value.
2.If LCD displays “1”, it means over range, should set the range knob to a higher range.
4-4.DCA MEASUREMENT
4-4-1.Insert the black test lead to “COM” jack and the red one to “mA” jack
（
max. 200mA
）
，
or
insert the red one to “10A” jack
（
max. 10A
）
.
4-4-2.Set the range knob to a proper DCA range, 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:
