C
A
mA
F
COM
V
A
V
V
10A
Cx
3
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, temperature 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. CHARACTERISTIC
3.1 GENERAL
3-1-1. Display: 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: 155mm×90mm×48mm
3-1-11. Weight: approx. 270g
（
including battery
）
.
3-1-12. Accessories: manual, holster, gift box, test lead a pair of TP01 thermocouple s
、
9Vbattery.
3.2 ELECTRICAL SPECIFICATIONS
3-2-1. Accuracy is ±(percentage of r number of digit) at 23±5
℃
,<75%RH.
3-3-2.
DCV
Range
Accuracy
Resolution
200mV
±(0.5%+3)
100uV
2V
1mV
20V
10mV
200V
100mV
1000V
±(0.8%+5)
1V
Input impedance: 10MΩ of all ranges.
Overload protection: 250V DC or AC peak value at 200mV range.
1000V DC or AC peak value at other ranges.
3-2-3.ACV
Range
Accuracy
Resolution
20V
±(0.8%+5)
10mV
200V
100mV
750V
±(1.2%+5)
1V
Input impedance: 10MΩ of all ranges.
Overload protection: 1000V DC or AC peak value.
Frequency response:
≤
200V range: (40~400)Hz.
750V range: (40~200)Hz.
Display: Sine wave RMS (mean value response)
3-2-4.DCA
Range
Accuracy
Resolution
20mA
±(0.8%+5)
10uA
200mA
100uA
10A
±(2.0%+8)
10mA
Max input voltage: 200mV
Max input current: 10A (up to 10 seconds)
Overload protection
：
Fast 0.2A/250V fuse, 10A/250V fuse.
3-2-5.ACA
Range
Accuracy
Resolution
20mA
±(1.5%+5)
10uA
200mA
100uA
10A
±(3.0%+10)
10mA
Max measuring voltage: 200mV
Max input current: 10A (up to 10 seconds)
Overload protection
：
Fast 0.2A/250V fuse, 10A/250V fuse
Frequency response: (40~200)Hz
Display: Sine wave RMS (mean value response)
3-2-6.RESISTANCE
Range
Accuracy
Resolution
200Ω
±(0.8%+5)
0.1Ω
2kΩ
±(0.8%+3)
1Ω
20kΩ
10Ω
200kΩ
100Ω
2MΩ
1kΩ
20MΩ
±(1.2%+8)
10kΩ
Open circuit voltage: less than 3V.
Overload protection: 250V DC or AC peak value.
NOTE: at 200Ω 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!
3-2-7.
CAPACITANCE
Range
Accuracy
Resolution
20nF
±(3.0%+10)
10pF
2uF
1nF
200uF
100nF
Overload protection: 36V DC or AC peak value.
3-2-8. TEMPERATURE
Range
Accuracy
Resolution
(-40 ~ 1000)
℃
< 400
℃
±(0.8%+4)
≥ 400
℃
±(1.5%+15)
1
℃
Sensor: K-type thermocouple ( banana shape plug )
3-2-9.DIODE AND CONTINUITY 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/Ωand COM is less
than about( 30±10)Ω.
Open circuit voltage approx. is
3V
Overload Protection: 250V DC/AC RMS
WARNING: Do not input any voltage at resistance range for safety!
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:
