DIGITAL MULTIMETER VC9808+
OPERATION MANUAL
1. GENERAL
The instrument is a stable and good performance digital multi-meter driven by
battery. It uses the LCD with 26mm-high figure to make the reading clear. Unit
symbol displaying, and the function of backlight and overload protection make
operation is convenient.
The instrument has the function of measuring DCV, ACV, DCA, ACA, resistance,
capacitance, inductance, temperature and frequency, and diode, triode and
continuity test. The instrument takes dual-integral A/D converter as key point,
is an excellent tool.
2. SAFETY NOTES
This series meter meets the standard of IEC1010. Please read below notes
carefully before operation.
1．Do not input a limited voltage which RMS is over DC 1000V or AC 750V when
measuring voltage.
2．Voltage less than 36V is a safety voltage. When measuring voltage higher
than DC 36V, AC 25V, check the connection and insulation of test leads to avoid
electric shock.
3．Be sure to keep the test leads off the testing points when converting function
and range
4．Select correct function and range to avoid fault operation.
5．When measuring current, do not input current over 20A.
6．Safety symbols
“ ” exists high voltage， “ ”GND， “ ” dual insulation，
“ ” must refer to manual， “ ”low battery indication.
3. SPECIFICATION
1) GENERAL
1-1．Displaying : LCD displaying
1-2．Max. indication: 1999（3 1/2）, auto polarity indication
1-3．Measuring method: dual slope A/D transfer
1-4．Sampling rate: approx. 3 times/sec
1-5．Over range indication: MSD displays “OL” or ”-OL”
1-6．Low battery indication: “ ” symbol displays
1-7．Operation: 0～40℃，relative humidity <80%
1-8．Storage: -10～50℃，relative humidity <80%
1-9．Power：one 9V battery (6F22 or equivalent）
1-10．Size: 185×93×35 mm
1-11．Weight: approx.290g (including a 9V battery)
1-12. Accessories: Operation Manual, holster, gift box, test leads, a pair of
TP01 thermocouple, 9V battery.
2) TECHNICAL DATA
2-1．Accuracy: ±（a% × reading + dgts） at 23 ± 5℃, relative humidity<75% .
One year guarantee since production date.
2-2. TECHNICAL DATA
2-2-1. DC Voltage
Input resistance：10MΩ for all ranges
Overload protection：Range 200mV: DC 250V or AC peak value
Other ranges: DC 1000V or AC peak value
2-2-2. AC Voltage
Input resistance：It is 1MΩ at range 200mV or 2V, and be 10MΩ at others；
Overload protection: DC 250V or AC peak value at range 200mV
DC 1000V or AC peak value at others
Frequency response：Range less than 200V: 40~400Hz
Range 750V: 40~100Hz
Displaying: RMS of sine wave (mean value response)
2-2-3. DCA
Max. measuring voltage drop: 200mV；
Max. input current: 20A (within 10 seconds)
Overload protection: 0.2A / 250V fast-blown fuse, range 20A infused.
2-2-4. ACA
Max. measuring voltage drop: 200mV
Max. input current: 20A (within 10 second）
Overload protection： 0.2A / 250V quick-action fused, Range 20A infused.
Frequency response：40~200Hz
Displaying: RMS of sine wave (mean value response)
2-2-5. Resistance（Ω）
± [ 5% ( reading –10 )+
20 ]
Open voltage：less than 3V
Overload protection：DC 250V or AC peak value
NOTE:
A：At range 200 Ω, short-circuit the test leads to measure the wire resistance,
then, subtracts it from the real measurement.
B：At range 2000 MΩ, when the test leads short circuit, LCD displays 10MΩ,
It’s normal and doesn’t affect the accuracy. Please deduct the value from
the real measurement. For example: the tested resistance is 1000 MΩ, the
reading should be 1010 MΩ, and the correct value is reduce 10 from the LCD
reading value, that is 1010-10=1000MΩ;
C：The reading be displayed slowly when the measurement is more than 1 MΩ.
Please wait it to be stable.
2-2-6. Capacitance
Test frequency: 100Hz
Overload protection：DC 36V or AC peak value
2-2-7. Inductance (L)
Test frequency：100Hz
Overload protection：DC 36V or AC peak value
2-2-8. Temperature
±(0.8%+4) < 400℃
±(1.5%+15) ≥ 400℃
K-type thermocouple ( banana shape plug )
2-2-9. Frequency
Input sensitivity：1V RMS
Overload protection：DC 250V or AC peak value (within 10 seconds)。
2-2-10. Diode and continuity testing
Forward voltage drop of diode
Forward DCA is approx.
1mA, the backward
voltage is approx 3V
Buzzer makes a long sound while
resistance is less than 30Ω±10Ω
Open voltage is approx.
3V
Overload protection：DC 250V or AC peak value
CAUTION：DO NOT INPUT VOLTAGE AT THIS RANGE!
2-2-11. Transistor hFE DATA TEST
Basic current is approx.
10uA ， Vce is about 3V
4. OPERATION
4-1．Panel description
1. LCD: display the measuring value and unit.
2-1. POWER switch: turn on/off the power.
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