User’s manual for
VC99 3 6/7 DMM
1.SUMMARY
This digital multimeter is a steady performance,
battery-driven 3 6/7 digital multimeter. It uses the LCD
with 23mm-high figure to make the reading clear and
make operation more convenient.
The digital multimeter has the function of measuring
DCV, ACV, DCA, ACA, resistance, capacitance,
frequency, temperature, duty cycle, transistor and diode,
continuity performance test .The meter can provide
functions including analog bar and unit symbol display,
data holding, relative value measuring, maximal/minimal
value
measuring,
auto/manual
range
switching
(RANGE), auto power off and warning functions .it
adopts double integral A/D converter as its core. It is an
ideal tool for labs, factories and radio-technology.
2.SAFTY NOTES
：
The instrument is designed according to IEC1010
standard (safety standard issued by International
Electro technical Committee). Please read the following
before operation.
1-1.Check the connection and insulation of test leads to
avoid electric shock.
1-2.Do not input a limited voltage higher than DC 1000V
or AC 750V when measuring ranges.
1-3.When measuring voltage higher than DC 60V, AC
40V, please be careful.
1-4. Select correct function and range to avoid fault
operation.
1-5.Please move the test leads away from test points
when switching the function.
1-6.Please
don’t input voltage value when measuring
current.
1-7.Please d
on’t modify the circuit.
1-8.Introduction for safety symbol:
“
” exists high voltage; “
” GND “
” dual
insulation
“
” must refer to manual “
” Low battery.
3. SPECIFICATION
1. General features
1-1. Displaying: LCD;
1-2.Max display: 6000(3 6/7) digits automatic polarity,
unit symbol and 61 section analog display;
1-3. Measurement method: double integral A/D
conversion;
1-4. Sampling rate: approx.3 times/sec.
1-5. Over-range display:
“OL” displayed in the highest
digit.
1-6. Low battery display
：
“
”
1-7. Working environment: (0
～
40)
℃
, relative humidity:
<80%;
1-8.Store environment: (-10
～
40)
℃
, relative humidity:
<80%;
1-9.Power supply
：
2pcs 1.5V battery
（
“AAA” battery
）；
1-10. Dimension:
185×93×35mm (length*width*height);
1-11. Weight: approx..290g
（
(including battery)
；
1-12.Accessories: test leads, user manual, temperature
probe, holster, gift box, and 2*1.5V battery.
2. TECHNICAL FEATURES
2-1. Accuracy:
± (a% × reading data + digits),
environment temperature at (23±5)
℃
, relative humidity
<75%, One year guarantee since production date.
2-2.DC Voltage
（
DCV
）
Range
Accuracy
Resolution
600mV
±(0.5%+3)
0.1mV
6V
1mV
60V
10mV
600V
100mV
1000V
±(0.8%+3)
1V
Input impedance: approx
. 10MΩ
Overload protection
：
1000V DC or 750V AC.
2-3.AC Voltage
（
ACV
）
Range
Accuracy
Resolution
6V
±(0.8%+5)
1mV
60V
10mV
600V
100mV
750V
±(1.0%+5)
1V
Input impedance: approx
. 10MΩ
Overload protection
：
1000V DC or 750V AC.
Frequency response:
（
40
～
200
）
Hz under 750V ,other
range:(40
～
400
）
Hz.
Sine wave RMS(Average value response).
2-4.DC Current
（
DCA
）
Range
Accuracy
Resolution
600uA
±(1.0%+3)
0.1μA
6000uA
1μA
60mA
10μA
600mA
100μA
6A
±(2.0%+5)
1mA
20A
10mA
MAX
measurement
voltage
drop:
：
full
range
mA :300mV
，
A:100mV
。
Max input current: 20A (within 15 seconds)
Over load protection: 500mA/ 250V and 13A/250V
fast molten fuse.
