1
830B
DMM OPERATOR’S MANUAL
1.
Overview
This multimeter is characterized at slim size, portable, stable performance .
Using 3½ digits LCD monitor with character 13MM 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, positive diode voltage fall, hFE parameters for transistor and
Continuity.
2. Safety Information
2-1 The meters are designed according to IEC-1010 concerning electronic
measuring instruments with an over-voltage category (CAT
Ⅲ
) and
pollution 2.
2-2 Follow all safety and operating instructions to ensure that the meter
is used safely and is kept in good operating condition.
2-3 safety symbols:
important safety information, refer to the operating manual.
Dangerous voltage may be presence.
Double insulation (protection Class II)
3. Special Cautions for Operation
3-1 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.
3-2 To avid risk of electric shock, do not use the meters before the cover
is in place.
3-3 The range switch should be right position for the testing.
3-4 To avoid electric shock and damaging the instruments, the input
signals are forbidden to exceed the specified limits.
3-5 When measuring TV set or switched power, attention should be paid
to the possible pulses that may bring destruction to the circuit.
3-6 Range switch position is forbidden to be changed at random during
measurement.
3-7 Take caution against shock in the course ot measuring voltage
higher than DC 60V & AC 30V.
3-8 Protection fuse should be replaced only with same type and same
specification.
4. GENERAL SPECIFICATIONS
4-1 Max Voltage between input terminal and Earth Ground: CAT II 600V
4-2 Over-range Indication: display “1” for the significant digit.
4-3 Automatic display of negative polarity “_”
4-4 Low Battery Indication: „ ‟ displayed
4-5 Max LCD display: 1999 (31/2 digits)
4-6 Fuse protection: F-200mA/250V (Ø 5x20MM)
4-7 Power Supply: 9V battery, 6F22 or NEDA 1604
4-8 Operating Temp.: 0
℃
to 40
℃
(relative humidity <85%)
4-9 Storage Temp.:-10
℃
to 50
℃
((relative humidity <85%)
4-10 Guaranteed precision Temp.: 23
±
5
℃
(relative humidity <85%)
4-11 Dimension: 69x126x24
4-12 Weight: approx. 120g (including battery)
5. 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%.
5-1 DC Voltage
range
resolution
accuracy
200mV
0.1mV
±
(0.8% of rdg +10 digits )
2000mV
1mV
±
(0.8% of rdg + 10digits)
20V
10mV
±
(0.8% of rdg +10 digits)
200V
100mV
±
(0.8% of rdg + 10 digits)
1000V
1V
±
(1.0% of rdg +15 digits)
-- Input Impendence: 1M
Ω
-- Overload protection: 250V for 200mV range, effective DC or AC 750V for
other ranges
5-2 AC Voltage
range
resolution
accuracy
200V
100mV
±
(1.2% of rdg + 20 digits)
750V
1V
±
(2.0% of rdg + 20 digits)
Frequency Range: 40 to 400Hz
40 to 100Hz for range 750V
-- Response: average, calibrated in rms of sine wave
5-3 DC Current
range
Resolution
accuracy
200uA
0.1
μ
A
±
(1.0% of rdg + 15 digits)
2000uA
1
μ
A
20mA
10
μ
A
200mA
100
μ
A
±
(1.5% of rdg + 20 digits)
10A
10mA
±
(3.0% of rdg + 20 digits)
-- Overload protection: F 250mA/250V fuse
Note: 10A range: not fused.
10A up to 10 seconds
5- 4 Resistance
range
Resolution
accuracy
200
Ω
0.1
Ω
±
(1.5% of rdg +25 digits)
2000
Ω
1
Ω
±
(0.8% of rdg + 20digits)
20K
Ω
10
Ω
±
(0.8% of rdg + 20 digits)
200K
Ω
100
Ω
±
(0.8% of rdg +20 digits)
2000K
Ω
1K
Ω
±
(1.8% of rdg + 20 digits)
-- over-load protection: 250V effective value
5-5
Transistor hFE Test
range
Test Range
Test Current / voltage
NPN & PNP
0-1000
Ib=10uA / Vce=3V
5-6 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. OPERATING INSTRUCTIONS
6-1 Attention before operation
6-1-1 Check 7V battery. If the battery voltage is less than 7V, display will
show “ ”, the battery should be replaced at this time to ensure
measuring precision.
6-1-2 Pay attention to the “
” besides the input jack which shows that
the input voltage or current should be within the specified value.
6-1-3 The range switch should be positioned to desired range for
measurement before operation.
6-2 Measuring DC Voltage
6-2-1 Connect the black test lead to COM jack and the red to V
Ω
mA jack.
6-2-2 Set the rotary switch at the desired DCV
range position.
6-2-3 Connect test leads across the source or load under
