DIGITAL MULTIMETER
OPERATION MANUAL
1. GENERAL
The instrument is a stable and good performance digital multimeter driven by battery.
It uses the LCD with 42mm-high figure to make the reading clear. Unit symbol
displaying, backlight and the function of overload protection make operation is
convenient.
The instrument has the function of measuring DCV, ACV, DCA, ACA, resistance,
capacitance, inductance, temperature and frequency, and diode, triode and
continuity test. The instrument takes dual-integral A/D converter as key point, is an
excellent tool.
2. SAFETY NOTES
This series meter meets the standard of IEC1010. Please read below notes
carefully before operation.
1
．
Do not input a limited voltage which RMS is over DC 1000V or AC 700V when
measuring voltage.
2
．
Voltage less than 36V is a safety voltage. When measuring voltage higher than
DC 36V, AC 25V, check the connection and insulation of test leads to avoid electric
shock.
3
．
Be sure to keep the test leads off the testing point when converting function and
range.
4
．
Select correct function and range to avoid fault operation.
5
．
When measuring current, do not input current over 20A.
6
．
Safety symbols
“
” exists high voltage
，
“
”GND
，
“
” dual insulation
，
“
” must refer to manual
，
“
” low battery
3. SPECIFICATION
1) GENERAL
1-1
．
Displaying : LCD displaying
1-2
．
Max. indication: 1999
（
3 1/2
）
, auto polarity indication
1-3
．
Measuring method: dual slope A/D transfer
1-4
．
Sampling rate: approx. 3 times/sec
1-5
．
Over range indication: MSD displays “OL”
1-6
．
Low battery indi
cation: “
” symbol displays
1-7
．
Operation: 0
～
40
℃
，
relative humidity <80%
1-8
．
Power
：
one 9V battery (NEDA1604/6F22 or equivalent
）
1-9
．
Size: 190×88.5×27.5 mm
1-10
．
Weight: approx.422g (including 9V battery)
2) TECHNICAL DATA
2-1
．
Accuracy:
±
（
a% × r dgts
）
at (23 ± 5)
℃
, relative humidity<75%. One
year guarantee since production date.
2-2. Function
:
·
DCV
·
Resistance Ω
·
Temperature
℃
·
ACV
·
Diode continuity testing
·
Frequency f
·
DCA
·
Triode h
FE
·
Inductance L
·
ACA
·
Capacitance C
·
Auto power-off
·
True RMS
·
Backlight
2-3. TECHNICAL DATA
2-3-1. DC Voltage
Input resistance
：
All range is
10MΩ
Overload protection
：
Range 200mV: DC 250V or AC peak value
Other ranges: DC 1000V or AC peak value
2-3-2. AC Voltage
Input impedance
：
All range is
10MΩ
；
The frequency response of the standard sine wave and triangular wave is 40Hz
~1kHz.
The frequency response of other waves is 40Hz ~200Hz
2-3-3. DCA
Max. measuring voltage drop: 200mV
；
Max. input current: 20A (within 10 seconds)
Overload protection:
0.2A / 250V fuse ;20A/250V fast-melt fused.
2-3-4. ACA
Range
Accuracy
Resolution
200
μ
A
±(0.8%+10)
0.1
μ
A
2mA
0.001mA
20mA
0.01mA
200mA
0.1A
20A
±(2.0%+5)
0.01A
Max. measuring voltage drop: 200mV
Max. input current: 20A (within 10 second
）
Overload protection
：
0.2A / 250V fuse ;20A/250V fast-melt fused.
Frequency response
：
sine and triangular wave: 40Hz~1kHz
Other wave: 40Hz~200Hz
Displaying: True RMS
2-3-5. Resistance
（
Ω
）
Range
Accuracy
Resolution
200Ω
± (0.8%+5)
0.1Ω
2kΩ
± (0.8%+3)
1Ω
20kΩ
10Ω
200kΩ
100Ω
2MΩ
1kΩ
20MΩ
± (1.0%+25)
10kΩ
2
00MΩ
± (5.0% + 30)
100k
Ω
Open voltage
：
less than 3V
Overload protection
：
DC 250V or AC peak value
NOTE:
A
：
At range 200
Ω, short-circuit the test leads to measure the wire
resistance, then, subtracts it from the real measurement.
B
：
The reading be displayed slowly when the measurement is more than 1
MΩ.
Please wait it to be stable.
2-3-6. Capacitance
Range
Accuracy
Resolution
20nF
±(3.5%+20)
10pF
200nF
100pF
2uF
1nF
20uF
10nF
200uF
±(5.0%+10)
100nF
2000uF
1uF
Overload protection
：
DC 250V or AC peak value
2-3-7. Inductance (L)
Range
Accuracy
Resolution
2mH
±(2.5%+30)
1uH
20mH
10uH
200mH
100uH
2H
1mH
20H
10mH
Overload protection
：
DC 36V
DO NOT INPUT VOLTAGE AT THIS RANGE
2-3-8. Temperature
Range
Accuracy
Resolution
(-20 ~ 1000)
℃
±(1.0%+5) < 400
℃
±(1.5%+15) ≥ 400
℃
1
℃
(0~1832)
°
F
±(0.75%+5) < 750
°
F
±(1.5%+15) ≥ 750
°
F
1
°
F
2-3-9. Frequency
Range
Accuracy
Resolution
10Hz
±(1.0%+3)
0.01Hz
100Hz
0.1Hz
1kHz
1Hz
10kHz
10Hz
100kHz
100Hz
1MHz/10MHz
1kHz/10kHz
Input sensitivity
：
1V RMS
Overload protection
：
DC 250V or AC peak value (within 10 seconds)
。
2-3-10. Diode and continuity testing
Range
Reading
Condition
Forward voltage drop of diode
Forward DCA is approx.
1mA, the backward
voltage is approx 3V
Buzzer makes a long sound
while resistance is less than
7
0Ω±20Ω
Open voltage is approx.
3V
Overload protection
：
DC 250V or AC peak value
Range
Accuracy
Resolution
200mV
±(0.5%+3)
0.1mV
2V
0.001V
20V
0.01V
200V
0.1V
1000V
±(0.8%+10)
1V
Range
Accuracy
Resolution
200mV
±(0.8%+5)
0.1mV
2V
1mV
20V
10mV
200V
100mV
750V
±(1.2%+10)
1V
Range
Accuracy
Resolution
200
μ
A
±(0.8%+10)
0.1
μ
A
2mA
0.001mA
20mA
0.01mA
200mA
0.1A
20A
±(2.0%+5)
0.01A
