Vichy VC99 3 6/7 DMM User Manual

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 don’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.

2-5.AC Current（ACA）

Range

Accuracy

Resolution

600uA

±(1.2%+5)

0.1μA

6000uA

1μA

40mA

10μA

600mA

100μA

6A

±(2.0%+10)

1mA

20A

10mA

MAX measurement voltage drop：full range mA :400mV，
A:200mV
Max input current: 20A (within 15 seconds)
Over load protection: 500mA/ 250V and 13A/250V
fast molten fuse.
Frequency response: 20A range:40～100Hz,other range:40～
400Hz

2-6.Resistance（Ω）

Range

Accuracy

Resolution

600Ω

±(0.8%+5)

0.1Ω

6kΩ

±(0.8%+3)

1Ω

60kΩ

10Ω

600kΩ

100Ω

6MΩ

1kΩ

60MΩ

±(1.2%+5)

10kΩ

Open circuit voltage:：600mV
Over load protection: 250V DC or AC peak value;
NOTE: At range 600 Ω, short-circuit the test leads to

measure the wire resistance and then subtracts it from

the real measurement. Or press “”REL” to clear the wire

resistance and read the value directly.

2-7.CAPACITANCE（C）

RANGE

ACCURACY

RESOLUTION

40nF

±(3.5%+10)

10pF

400nF

±(2.5%+5)

100pF

4μF

1nF

40μF

10nF

400μF

±(5.0%+8)

100nF

2000μF

1uF

Overload protection :250V DC or AC peak value.

2-8.REQUENCY（F）

RANGE

ACCURACY

RESOLUTIO
N

10Hz

±(0.5%+4)

0.01Hz

100Hz

0.1Hz

1000Hz

1Hz

10kHz

10Hz

100kHz

100Hz

1MHz

1kHz

60MHz

10kHz

Input sensitivity:0.7V
Over load protection: 250V DC or AC peak value;

2-9.Transistor(hFE)

RANGE

VALUE

TESTING

CONDITION

NPN OR PNP

0～1000

Basic current

approx.15μA，

Vce approx.4.5V

2-10. Diode and continuity performance test

ran

ge

VALUE

TESTING

CONDITION

Forward voltage drop
of diode

Forward DCA is
approx. 0.5mA, the
backward voltage is
approx 1.5V

Buzzer makes a long
sound while
resistance is less
than (50±10)Ω

Open circuit voltage
is approx. 0.5V

Over load protection: 250V DC or AC peak value;
CAUTION ： DO NOT INPUT VOLTAGE AT THIS
RANGE!

2-10. TEMPERATURE（℃）

RANGE

VALUE

RESOLUT

ION

-40℃-1000℃

＜ 400℃

±(0.8%+4)

≥400℃ ±(1.5%+15)

1℃

0F-1832℉

＜ 750℉

±(0.8%+5)

≥750℉

±(1.5%+15)

℉

Sensor：TP01(K type thermocouple)
CAUTION ： DO NOT INPUT VOLTAGE AT THIS
RANGE!

4. OPERATION

4-1. Panel description

1. LCD: display the measuring value and unit.

2.Function key:
2-1.HOLD key：press it, the presently measured value is
held on LCD and HOLD symbol displays. Press it again,
HOLD symbol disappears, and the meter is exited the
holding mode.
2-2. REL key：press it，reading clear，turn into relative
value measurement states ， “REL”symbol displays,
Press it again,“REL” symbol disappears, and the meter
is exited the relative mode.
2-3. Hz/DUTY key：When measuring the AC Voltage
(Current) ， press it ， it will switch Frequency/duty
cycle/Voltage(Current) ， When measuring the
Frequency ,it will switch frequency/duty cycle（1~99%）。
2-4.”DC/AC”key: switch DC and AC work mode..
2-5.RANGE key：select auto range or manual range
mode, Auto range is the original states, it will
display ”AUTO” symbol ，press it change to manual
range .Press it more than 2 second , it will return to auto
range states
2-6.MAX/MIN key :press it, turn into MAX mode, it will
hold the max value of measuring, press it again ,turn
into MIN mode, it will hold the min value of measuring.
No auto power off and analog bar display under this
mode. Press it more than 2 second , it will exit MAX/MIN
states.