36
k
DIGITAL MULTIMETER
OPERATOR’S MANUAL
1.
Overview
The multimeter is characterized at slim size, portable, stable performance
and anti-dropping capacity. Using 3¾ 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 & AC current,
resistance, capacitor, Frequency, positive diode voltage fall, hFE
parameters for transistor and Continuity.
2. Panel Layout
①
LCD Display: 3¾ digits, full function symbol display
②
function selector switch
③
Data-hold/ Back Light Switch:
Pressing this button for more than 1
seconds, the meter exits the HOLD mode and returns to the normal
state. Pressing the button for more than 2 seconds turns the
backlight on, pressing it again turns it off
.
④
Rotary Switch: use this switch to select functions and ranges
⑤
V
Ω
mA Hz
-II-
Input Jack
、
10A Input Jack
、
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 600V (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, set function switch at OFF range 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
600V
5-2 Over-range Indication: display “OL” for the significant digit.
5-3 Automatic display of negative polarity “_” .
5-4 Low Battery Indication: „
‟ displayed
5-5 Max LCD display: 3999 (3¾ digits)
5-6 auto ranges
5-7 Fuse protection: F-500mA/250V (Ø 5x20mm)
5-8 Power Supply: 1.5V(AAA) x2
5-9 auto power-off
5-10 Operating Temp.: 0
℃
to 40
℃
(relative humidity <85%)
5-11 Storage Temp.:-10
℃
to 50
℃
((relative humidity <85%)
5-12 Guaranteed precision Temp.: 23
±
5
℃
(relative humidity <70%)
5-13 Dimension: 143x75x32mm
5-14 Weight: approx. 200g (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
accuracy
400mV
0.1mV
±
(0.8% of rdg + 7 digit )
4V
1mV
±
(0.8% of rdg +7 digits)
40V
10mV
±
(0.8% of rdg +7 digits)
400V
100mV
±
(0.8% of rdg +7 digits)
1000V
1V
±
(1.5% of rdg +10 digits)
-- Input Impendence: 10M
Ω
-- Overload protection: 250V for 400mV range, effective DC or AC 1000V
for other ranges
6-2 AC Voltage
range
resolution
accuracy
4V
1mV
±
(1.2% of rdg + 15 digits)
40V
10mV
±
(1.2% of rdg +15 digits)
400V
100mV
±
(1.2% of rdg + 15 digits)
750V
1V
±
(2.5% of rdg +1 5 digits)
-- Frequency Range: 40 to 400Hz,40 to 100Hz for ranges 400V & 750V
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
range
Resolution
accuracy
400
μ
A
0.1
μ
A
±
(1.5% of rdg +15 digits)
4000
μ
A
1
μ
A
±
(1.5% of rdg + 15 digits)
40mA
10
μ
A
±
(1.0% of rdg +1 2 digits)
400mA
100
μ
A
±
(1.5% of rdg +1 2 digits)
4A
1mA
±
(1.8% of rdg +1 2 digits)
10A
10mA
±
(3.0% of rdg + 15 digits)
-- Overload protection: F500mA/250V fuse
Note: 4A & 10A ranges are not fused 10A up to 10 seconds
6-4 AC Current
range
Resolution
accuracy
400
μ
A
0.1
μ
A
±
(1.8% of rdg +20 digits)
4000
μ
A
1
μ
A
±
(2.0% of rdg + 20 digits)
40mA
10
μ
A
±
(1.3% of rdg +20 digits)
400mA
100
μ
A
±
(1.8% of rdg + 20 digits)
4A
1mA
±
(2.0% of rdg +20 digits)
10A
10mA
±
(3.0% of rdg +20 digits)
-- Overload protection: F 500mA/250V fuse Note: 4A & 10A ranges are not
fused 10A up to 10 seconds
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-5 Resistance
range
Resolution
accuracy
400
Ω
0.1
Ω
±
(1.8% of rdg +23 digits)
4k
Ω
1
Ω
±
(1.8% of rdg +18 digits)
40k
Ω
10
Ω
±
(1.8% of rdg +18 digits)
400k
Ω
100
Ω
±
(1.8% of rdg +18digits)
4M
Ω
1k
Ω
±
(1.8% of rdg +18 digits)
40M
Ω
10k
Ω
±
(2.0% of rdg + 20 digits)
-- over-load protection: 250V effective value
6-6 Capacitor
range
Resolution
accuracy
40nF
0.01nF
±
(3.5% of rdg +30 digits)
400nF
0.1nF
±
(3.0% of rdg +2 5 digits)
4μ
F
1nF
±
(3.0% of rdg +2 5 digits)
40
μ
F
10nF
±
(3.0% of rdg +2 5 digits)
100
μ
F
100nF
±
(3.0% of rdg +25 digits)
-- over-load protection: 250V effective value
6-7 Frequency Testing
