DIGITAL MULTIMETER
OPERATOR'S MANUAL
1. Overview
The multimeter is characterized at slim size, portable, stable performance and
anti-dropping capacity. Using 3 1/2 digits LCD monitor with character 28mm high,
they offer clear readings.
With overall circuitry design centering on large-scale IC
A/D converters in conjunction and over-load protection circuit, the meters give
excellent performance and exquisite making as a handy utility instrument.
The meters can be used to measure DC & AC voltage, DC & AC current, resistance,
capacitor, Inductance, temperature, frequency, transistor hFE, Non Contact AC
Voltage (NCV) detection, positive diode voltage fall and audible continuity.
2. Panel Layout
NCV detection area: Non Contact AC Voltage (NCV) detection area.
1
CDS sensor: The CDS sensor can reaction to the ambient brightness range,
2
then automatically control the LCD backlight to lighten or go out.
NCV red light: Non Contact AC Voltage (NCV) detection red light.
3
NCV green light: Non Contact AC Voltage (NCV) detection green light.
4
LCD display: 3 1/2 digits LCD display.
5
POWER key: Press the "POWER" key to power on or off the meter.
6
HOLD key: Press the "HOLD" key to lock display value, and the "
7
appear on the display, press it again to exit.
Cx+ input jack.
8
Lx+ input jack.
9
Cx-/Lx- input jack.
10
Rotary Switch: Use this switch to select functions and ranges.
11
μAmAT+: μAmA and Temperature "+" Input Jack
12
20A: 20A Input Jack
13
VΩHz
: V/200kHz/
14
COMT-: COM and Temperature "-" Input Jack
15
Transistor hFE test Input Jack
16
Crust of meter
17
Protective casing
18
3. Safety Information
3-1 The meter is designed according to IEC-1010 concerning electronic measuring
instruments with an over-voltage category 1000V (CAT Ⅲ) and pollution 2.
3-2 Follow all safety and operating instructions to ensure that the meter is used
safely and is kept in good operating condition.
3-3 safety symbols:
Important safety information, refer to the operating manual.
Dangerous voltage may be presence.
Double insulation (protection Class II)
4. Special Cautions for Operation
4-1 The meters can be safe only according to standard procedures when used in
conjunctions with the supplied test leads. To replace damaged test leads with only
the same model or same electric specifications.
4-2 To avid risk of electric shock, do not use the meters before the cover is in place.
4-3 The range switch should be right position for the testing.
4-4 To avoid electric shock and damaging the instruments, the input signals are
forbidden to exceed the specified limits.
4-5 When measuring TV set or switched power, attention should be paid to the
possible pulses that may bring destruction to the circuit.
4-6 Range switch position is forbidden to be changed at random during
measurement.
4-7 Take caution against shock in the course of measuring voltage higher than DC
60V & AC 30V.
4-8 Protection fuse should be replaced only with same type and same specification.
4-9 After operation is finished, power OFF the meter to save battery power.
4-10 If the meter is without usage for long time, take out battery to avoid damage by
battery leakage.
5. GENERAL SPECIFICATIONS
5-1 Max Voltage between input terminal and Earth Ground: CAT Ⅲ 1000V
5-2 Over-range Indication: display "1" or "-1" for the significant digit.
5-3 Automatic display of negative polarity "-" .
5-4 Low Battery Indication: "
" displayed.
5-5 Display: 3 1/2 digit LCD with a max. reading of 1999.
5-6 Manual range control
5-7 Auto Power Off: The meter will switch to standby mode when power on after
approx. 20 minutes. Press the "POWER" key two times to power on the meter
again.
5-8 Auto LCD backlight
5-9 Fuse protection: 200mA/500V & 20A/500V Fast Fuse
5-10 Power supply: 9V battery (6F22 or NEDA 1604)
5-11 Operating Temp. : 0℃ to 40℃ (relative humidity <85%)
5-12 Storage Temp. : -10℃ to 50℃ ((relative humidity <85%)
770C
Input Jack
5-13 Guaranteed precision Temp. : 23±5℃ (relative humidity <70%)
5-14 Dimension: 195x88x40mm
5-15 Weight: approx. 350g (including battery)
6. Testing Specifications
Accuracy is specified for a period of year after calibration and at 18℃ to 28℃
(64℉ to 82℉) with relative humidity to 70%.
6-1 DC Voltage
Range
Resolution
200mV
20V
1000V
-- Impedance: 10MΩ
-- Overload protection: 1000V DC or 750V AC rms
6-2 AC Voltage
Range
Resolution
2V
20V
750V
-- Impedance: 10MΩ
-- Overload protection: 1000V DC or 750 AC rms
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
Range
Resolution
2mA
20mA
200mA
20A
-- Overload protection: 200mA/500V & 20A/500V Fast Fuse
Note: 20A up to 10 seconds
6-4 AC Current
Range
Resolution
" sign will
2mA
200mA
20A
-- Overload protection: 200mA/500V & 20A/500V Fast Fuse Fast Fuse
Note: 20A up to 10 seconds
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-5 Resistance
Range
Resolution
200Ω
20kΩ
200kΩ
20MΩ
-- Overload protection: 500V DC or AC rms
6-6 Capacitance
Range
20nF
200nF
2µF
200µF
6-7 Inductance
Range
20mH
200mH
2H
20H
6-8 Temperature
Range
-20~150℃
℃
150~1000℃
-- NiCr-NiSi K-type sensor
-- Overload protection: 200mA/500V Fast Fuse
6-9 Frequency
Range
200kHz
-- Sensitivity: sine wave 1V rms
-- Overload protection: 500V DC or AC rms
6-10 Diode and Audible continuity test
Range
Display read approximately
forward voltage of diode
Built-in buzzer sounds if
resistance is less than 50Ω
Overload protection: 500V DC or AC rms
6-11 Transistor hFE test
Test range: 0-1000
Ib=10µA, Vce=3.0V Approx.
6-12 Non Contact AC Voltage (NCV) detection
Test voltage range: 90V~1000V AC rms
The NCV red LED light and green LED light will light up alternately together with
sound.
Accuracy
0.1mV
±(0.5% of rdg + 2 digits)
10mV
1V
±(0.8% of rdg + 2 digits)
Accuracy
1mV
±(1.0% of rdg + 2 digits)
10mV
1V
±(1.2% of rdg + 3 digits)
Accuracy
1μA
10μA
±(1.2% of rdg + 2 digits)
100μA
10mA
±(2.0% of rdg + 3 digits)
Accuracy
1μA
±(1.5% of rdg + 3 digits)
100μA
10mA
±(2.5% of rdg + 5 digits)
Accuracy
0.1Ω
±(1.0% of rdg + 3 digits)
10Ω
±(1.0% of rdg + 2 digits)
100Ω
10kΩ
±(1.5% of rdg + 3 digits)
Accuracy
±(2.5% of rdg + 5 digits)
±(5.0% of rdg + 10 digits)
Accuracy
±(2.5% of rdg + 5 digits)
Accuracy
± ( 3℃+ 1digit )
± ( 3% of rdg + 2digits )
Accuracy
± (2.0% of rdg + 5 digits)
Description
Test Condition
Forward DC current
approx. 1mA
Reversed DC voltage
approx. 3V
Open circuit voltage
approx. 3V
Resolution
10pF
100pF
1nF
100nF
Resolution
10µH
10µH
1mH
10mH
Resolution
1℃
Resolution
100Hz
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