1
DMM OPERATOR’S MANUAL
1.
Overview
This multimeter is characterized at slim size, portable, stable performance
and anti-dropping capacity. Using 3½ digits LCD monitor with character
15MM 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 current,
resistance, temperature, positive diode voltage fall, hFE parameters for
transistor and Continuity.
2. Panel Layout
1
LCD Display: 3½ digits, character 15MM high
2
Data-hold Switch (HOLD)Back
3
Light Button Switch: Press this button to switch on back light If the
dark circumstance light makes the reading difficulty when measuring,
the light will be automatically turned off in 5 seconds. Press again to
switch it on again. If the battery is in weak power, the light will be
dimmed.
4
Rotary Switch: use this switch to select functions and ranges
5
VΩmA/T+ Input Jack、10A Input Jack 、T-/COM Input Jack
3. Safety Information
3-1 The meters are designed according to IEC-1010 concerning electronic
measuring instruments with an over-voltage category (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 ot measuring voltage
higher than DC 60V & AC 30V.
4-8 Protection fuse should be replaced only with same type and same
specification.
5. GENERAL SPECIFICATIONS
5-1 Max Voltage between input terminal and Earth Ground: CAT Ⅲ 600V
5-2 Over-range Indication: display “1” for the significant digit.
5-3 Automatic display of negative polarity “_” .
5-4 Low Battery Indication: ‘ ’ displayed
5-5 Max LCD display: 1999 (31/2 digits)
5-6 Fuse protection: F-200mA/250V (Ø5x20MM)
5-7 Power Supply: 9V battery, 6F22 or NEDA 1604
5-8 Operating Temp.: 0℃ to 40℃ (relative humidity <85%)
5-9 Storage Temp.:-10℃ to 50℃ ((relative humidity <85%)
5-10 Guaranteed precision Temp.: 23±5 ℃
(relative humidity <85%)
5-11 Dimension: 69x138x31MM
5-12 Weight: approx. 170g (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 75%.
6-1 DC Voltage
range
resolution
accuracy
200mV
0.1mV
±(0.5% of rdg +10 digits)
2V
1mV
±(0.5% of rdg + 10 digits)
20V
10mV
±(0.5% of rdg +10 digits)
200V
100mV
±(0.8% of rdg +10 digits)
600V
1V
±(1.0% of rdg + 10 digits)
-- Input Impendence: 1MΩ
-- Overload protection: 250V for 200mV range, effective DC or AC 600V for
other ranges
6-2 AC Voltage
range
resolution
accuracy
200V
100mV
±(1.2% of rdg + 20 digits)
600V
1V
±(1.2% of rdg + 20 digits)
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
range
Resolution
accuracy
2mA
1μA
±(1.0% of rdg + 10 digits)
20mA
10
μ
A
±(1.0% of rdg + 10 digits)
200mA
100μA
±(1.5% of rdg + 20 digits)
10A
10mA
±(3.0% of rdg + 20 digits)
-- Overload protection: F 200mA/250V fuse
Note: [1] 10A range: not fused [2] 10A up to 10 seconds
6- 4 Resistance
range
Resolution
accuracy
200Ω
0.1Ω
±(1.5% of rdg +25 digits)
2KΩ
1Ω
±(0.8% of rdg + 20 digits)
20KΩ
10Ω
±(0.8% of rdg + 20 digits)
200KΩ
100
±(0.8% of rdg + 20 digits)
2MΩ
1KΩ
±(1.2% of rdg +25digits)
-- over-load protection: 250V effective value
6-5 Temperature
range
resolution
Accuracy
-20~400 ℃
1℃
±(1.2% of rdg +5 digits)
400~1000 ℃
1℃
±(2.0% of rdg + 15 digits)
-- over-load Protection: 36V DC or rms AC, Please use a special
temperature probe to measuring high temperature.
6-6 Transistor hFE Test
range
Test Range
Test Current / voltage
NPN & PNP
0-1000
Ib=10uA / Vce=3V
6-7 Diode Test
range
resolution
Function
1mV
Display: read approximate
forward voltage of diode
-- over-load Protection: 250V effective value
-- forward DC current: approximate 1mA
-- Reversed DC voltage: approximate 3.0V
6-8 Continuity
range
Function
Built-in buzzer will sound if resistance is lover than 90Ω
-- over-load protection: 250V effective value
-- open circuit voltage: approximate 3.0V
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