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 du al-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
Range
Accuracy
Resolution
200mV
±(0.5%+3)
0.1mV
2V
1mV
20V
10mV
200V
100mV
1000V
±(1.0%+5)
1V
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
Range
Accuracy
Resolution
200mV
±(0.8%+5)
0.1mV
2V
1mV
20V
10mV
200V
100mV
750V
±(1.2%+5)
1V
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
Range
Accuracy
Resolution
2mA
±(0.8%+3)
1uA
20mA
10uA
200mA
±(1.2%+4)
100uA
20A
±(2.0%+5)
10mA
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
Range
Accuracy
Resolution
2mA
±(1.0%+5)
1uA
20mA
±(2.0%+5)
10uA
200mA
100uA
20A
±(3.0%+10)
10mA
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）
Range
Accuracy
Resolution
200Ω
± (0.8%+5)
0.1Ω
2kΩ
± (0.8%+3)
1Ω
20kΩ
10Ω
200kΩ
100Ω
2MΩ
1kΩ
20MΩ
± (1.0%+15)
10kΩ
2000MΩ
± [ 5% ( reading –10 )+
20 ]
1MΩ
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: th e 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
Range
Accuracy
Resolution
20nF
±(2.5%+20)
10pF
200nF
100pF
2uF
1nF
20uF
10nF
2000uF
±(5.0%+5)
1uF
Test frequency: 100Hz
Overload protection：DC 36V or AC peak value
2-2-7. Inductance (L)
Range
Accuracy
Resolution
2mH
±( 2.5%+20)
1uH
20mH
10uH
200mH
100uH
2H
1mH
20H
10mH
Test frequency：100Hz
Overload protection：DC 36V or AC peak value
2-2-8. Temperature
Range
Accuracy
Resolution
(-40 ~ 1000)℃
±(0.8%+4) < 400℃
±(1.5%+15) ≥ 400℃
1℃
K-type thermocouple ( banana shape plug )
2-2-9. Frequency
Range
Accuracy
Resolution
2kHz
±(0.5%+4)
1Hz
20kHz
10Hz
200kHz
100Hz
2000kHz
1kHz
10MHz
10kHz
Input sensitivity：1V RMS
Overload protection：DC 250V or AC peak value (within 10 seconds)。
2-2-10. Diode and continuity testing
Range
Reading
Condition
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
Range
Displaying range
Test condition
hFE NPN or PNP
0 ~ 1000
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.
2-2. PK HOLD key: press it, the max. of presently measured value is held on
LCD and PH symbol displays. Press it again, PH symbol disappears, and the meter
is exited the holding mode.
2-3. DC/AC key：set DC or AC working mode.
3. hFE hole：to measure hFE of triode.
4. Range knob: to select measuring function
and range.
5. Capacity（Cx）or inductance (Lx) COM
6. Voltage, resistance and frequency COM
7. battery case
SEE THE FIG.
4-2．Voltage measurement
1. Apply the black test lead to “COM” terminal and the red one to V/Ω/Hz
terminal.
2. Setup the Knob on a proper range “V”. If the voltage range is unsure
beforehand, please set it on the max., then measure diminishingly to reach a
resolute value.
3. Press the DC/AC key down to DC mode to measure DC voltage. Oppositely, resile
the key to AC mode to measure AC voltage.
4. Connecting the test leads reliably with the tested circuit, the voltage value
will be displayed on LCD. While testing a DC voltage, the reading is voltage
and polarity of the point connected by the red lead.
NOTE:
1. While the reading is OL，the voltage is beyond the present range. Now you
need to set the knob to the higher.
2. Do not input a voltage over DC 1000V or AC 750V. Please keep the test leads
off the circuit while switching the function or range
3. Be carefully while measuring a high voltage. DO NOT touch the circuit.
4-3．Current measurement
1. Apply the black test lead to “COM” terminal and the red one to “mA” or
“20A” terminal.
2. Set the knob to a proper range A. If the current under tested is unsure
beforehand, please set it on the max., then measure diminishingly to reach a
resolute value.
3. Press the DC/ AC key down to DC mode to measure DC current. Oppositely,
resiling the key to AC mode to measure AC current.
4. Connecting the leads with the tested circuit in series, the current value
is displayed on LCD. While testing a DC current, the reading is the value of
current and polarity of the point connected by the red lead.
NOTE:
1．If the LCD displays OL，it means the current is over range. Now you need
to set the knob to the higher.
2．Max. input current is 200mA or 20A（subject to where the red test lead apply
to）, too large current will blow the fuse. Be sure the test is less than 10
seconds. Please keep the leads off the circuit while switching the function
and range knob.
4-4．RESISTANCE MEASUREMENT
1. Apply the black lest lead to COM terminal and the red one to V/Ω/Hz terminal.
2. Set the knob to a proper resistance range, and connect the leads crossly
with the resistor under tested.
NOTE:
1. The LCD displays OL while the resistance is over the selected range. The
knob should be adjusted to a higher range.
2. When input terminal is in open circuit, overload displays.
3. When measuring in line resistor, be sure that the pow er is off and all
capacitors are released completely.
4. Do not input any volt at resistance range.
5. When measuring value is over 1MΩ, the reading will take a few seconds to
be stable. It’s normal for high resistance measuring.
4-5．CAPACITANCE MEASUREMENT
1. Apply the knob to proper capacitance range, and insert the capacitor under
tested into “Cx” terminal. Connect test leads with the two points of capacitor,
be wary of polarity if necessary.
NOTE:
1. If the capacitance under tested is over the max. value of selected range,
LCD displays OL, thus, should set the knob to a higher range.
2. It’s normal that there is a remained value on LCD before capacitance
measurement, and it doesn’t affect the measurement.
3. When measuring at large capacitance range, if capacitor is crept badly or
broken, LCD displays a value and it’s unstable.
4. Release the capacitor completely before measuring.
4-6．INDUCTANCE MEASUREMENT
Set the knob to a proper inductance range and insert the inductor to LX terminal.
NOTE: 1. The LCD displays OL while the tested inductance is over the selected
range. Thus, the knob should be set to a higher range.
2. The inductance may be different due to different resistance on a same
inductor.
3. At 2mH range, should make the test leads short and measure the inductance
of wire, then, subtract from real measurement.
4-7．TEMPERATURE MEASUREMENT
Set the knob to ℃ range, insert the black plug of cold end of thermocouple
into mA com and the red plug to V/Ω/Hz com，put working end into measurement
place. Display reading is the temperature of measurement place in ℃ .
NOTE: 1. When input terminal is in open circuit, if the ambient temperature
is over 18℃, LCD displays the ambient temperature. If ambient temperature is
lower than 18℃, LCD displays an un-normal temperature.
2. Do not try to change the thermocouple, or, the accuracy cannot be guaranteed.
3. Do not input any volt at a temperature range.
4-8. FREQUENCY MEASUREMENT
1. Apply test leads or shield cable to COM and V/Ω/Hz terminal.
2. Set the knob to frequency range, connect test leads or cable crossly to signal
source or tested load.
NOTE:
1. When input over 10V RMS, reading is workable but accuracy is not guaranteed.
2. It is better to use shield cable to measure small signal at noisy environment.
3. Be careful when measuring high volt circuit.
4. Do not input voltage over DC 250V or AC peak value.
4-9. TRANSISTOR hFE
1. Set the knob to hFE range.
2. Verify the transistor under tested is NPN or PNP, insert emitter, base and
collector to proper jack.
4-10. DIODE AND CONTINUITY TEST
1. Apply the black test lead to “COM” terminal and the red one to V/Ω/Hz
terminal the polarity of red lead is “+”）.
2. Set the knob to range, connect test leads with the diode under tested,
the red test connect to diode positive polarity, the reading is the approx.
value of diode forward volt drop.
3. Forward testing: Apply the red test lead to the anode of diode, and apply
the black test lead to the cathode of diode, and LCD will display the approx.
value of forward voltage drop of diode;
4. Backward testing: Apply the red test lead to the cathode of diode, and apply
the black test lead to the anode of diode, and LCD will display OL.
5. Whole diode test including the forward and backward test, if the test result
doesn’t fit with the above, it means the diode doesn’t work.
6. Apply test leads to two points of tested circuit, if the inner buzzer sounds,
the resistance is less than (30 ± 10) Ω.
4-11．PEAK VALUE HOLD
Press down the key, the max. of presently measured value is held on LCD. Press
up the key and the function is cancelled.
4-12．AUTO POWER OFF
The meter will be into sleeping mode when it works for 20±10 minutes. Press
“POWER” key twice to restart the power.
5．MAINTENANCE
Do not try to modify the electric circuit.
NOTE:
5-1.The voltage should be not higher than DC1000V and AC750V rms.
5-2. Do not test the voltage at the range of Ω.
5-3. Do not test without setting into the battery and battery case well.
5-4. Please move the test leads from the measuring point, and turn off the power
button before changing the battery and fuse.
5-5. Keep the meter away from water, dust and shock.
5-6. Do not store and operate the meter under the condition of high temperature,
high humidity, combustible, explosive and strong magnetic place.
5-7. Wipe the case with a damp cloth and detergent, do not use abrasives and
alcohol.
5-8. If do not operate for a long time, should take out the battery to avoid
leakage
5-9. When signal displays, should replace the
battery following the steps:
5-9-1. Take off the holster. (see fig. 2)
5-9-2 Unlock the screw and remove the battery case.
5-9-3. Take out the old battery and replace the new
one. It's better to use alkaline battery for longer
life
5-9-4. Fit on the battery case and lock the screw.
5-9-5. Fit on the holster as the opposite way (see
fig.2)
5-10. Please select the same size fuse before
replace it.
5-10-1. Take off the holster, then unlock the screw and remove the battery case.
5-10-2. Take off the old fuse and change another new one.
5-10-3. Fit on the battery case and lock the screw and fit on the holster.
6. If the meter does not work properly, check the meter as following:
Fault
Solution
No reading on LCD
Turn on the power
Set the HOLD key to a correct mode
Replace battery
signal appears
Replace battery
No current or temperature
input
Replace fuse
Big error Value
Replace battery
The specifications are subject to change without totice.
The content of this manual is regarded as correct, error or omits.
Please contact with factory.
We herby will not be responsible for the accident and damage caused
by improper operation.
The function stated for this User Manual cannot be the reason of
special usage.
E-VC9808+/V1.0
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