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1
PIN-142 MANUAL
1. Overview
The multimeter is characterized as slim sized, portable, stable
performance and anti-dropping capacity. Using a 3½ digits LCD monitor it
offers clear readings.
The meters can be used to measure DC & AC voltage, DC current,
resistance, temperature, positive diode voltage fall, hFE parameters for
transistor and continuity and gives excellent performance and exquisite
making as a handy utility instrument.
2. Panel Layout
LCD Display: 3½ digits, character 16mm high
Data-hold Switch (HOLD)
Back Light Button Switch: Press this button to switch back light on
and off. If the battery is weak, the light will be dimmed.
Rotary Switch: use this switch to select functions and ranges
10A -input Jack, Temp (-) & COM -input Jack, Temp (+) & V Ω mA
-input Jack
3. Safety Information
a. The meter is designed according to IEC-1010 concerning electronic
measuring instruments with an over-voltage category (CAT ) and
pollution degree 2.
b. Follow all safety and operating instructions to ensure that the meter is
used safely and is kept in good operating conditions.
c. Safety symbols:
important safety information, refer to the operating manual.
Dangerous voltage may be present.
Double insulation (protection Class II)
4. Special Cautions for Operation
a. The meter can be safe only according to standard procedures when
used in conjunction with the supplied test leads. Replace damaged test
leads only with the same model or same electric specifications.
b. To aviod risk of electric shock, do not use the meter without the cover
in place.
c. The range switch should be in the correct position for testing.
d. To avoid electric shock and damaging the instruments, the input
signals should not exceed the specified limits.
e. When measuring TV sets or power switches, attention should be paid
to the possible pulses that may bring destruction to the circuit.
f. The range switch position should not be changed at random during
measurement.
g. Take caution against shocks while measuring voltages higher than
60V DC & 30V AC.
h. The protection fuse should be replaced only with the same type and
same specifications.
5. GENERAL SPECIFICATIONS
a. Max Voltage between input terminal and earth ground: CAT
600V
b. Over-range indication: the display will mark “1”.
c. Automatic display of negative polarity “-” .
d. Low Battery Indication: „ is displayed
e. Max LCD display: 1999 (3 1/2 digits)
f. Fuse protection: F-200mA/250V (Ø5x20mm)
g. Power Supply: 9V battery, 6F22 or NEDA 1604
h. Operating Temp.: 0°C to 40°C (relative humidity <85%)
i. Storage Temp.:-10°C to 50°C (relative humidity <85%)
j. Guaranteed precision Temp.: 23±5°C (relative humidity <85%)
k. Dimension: 143x75x32mm
l. Weight: approx. 200g (including battery)
6. Testing Specifications
Accuracy is specified for a period of 1 year after calibration and at 18°C to
28°C (64°F to 82°F) with relative humidity to 75%.
6-1 DC Voltage
range
resolution
accuracy
200mV
0.1mV
±(0.5% of rdg + 10 digit )
2V
1mV
±(0.5% of rdg + 10 digits)
20V
10mV
±(0.5% of rdg + 10 digits)
200V
100mV
±(0.8% of rdg + 10digits)
600V
1V
±(1.2% of rdg + 10 digits)
-- Input impedance: 10MΩ
-- 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
±(1.8% 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 + 20 digits)
20mA
10μA
±(1.0% of rdg + 20 digits)
200mA
100μA
±(1.5% of rdg + 20 digits)
10A
10mA
±(3.0% of rdg + 20 digits)
-- Overload protection: F 200mA/250V fuse
Note: 10A range: not fused, 10A up to 10 seconds
6-4 Resistance
range
resolution
accuracy
200Ω
0.1Ω
±(1.5% of rdg +25 digits)
2KΩ
±(0.8% of rdg +20 digits)
20KΩ
10Ω
±(0.8% of rdg +20 digits)
200KΩ
100Ω
±(0.8% of rdg +20digits)
2MΩ
1KΩ
±(2.0% of rdg +25 digits)
-- over-load protection: 250V effective value
6-5 Temperature
range
resolution
Accuracy
-20~400 °C
1°C
±(1.2% of rdg +5 digits)
400~1000 °C
1°C
±(2.0% of rdg + 15 digits)
-- over-load Protection: 250V DC or rms AC
6-6 Transistor hFE Test
range
Test Range
NPN & PNP
0-1000
6-7 Diode Test
range
resolution
1mV
-- over-load Protection: 250V effective value
-- forward DC current: approximate 1mA
-- Reversed DC voltage: approximate 3.0V
5


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