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6. Common ground

7. Terminal for

V oltage

resistance, and frequency testing

4-2

． DCV

DCV

measurement

4-2-1 ． Apply the black test leads to “ COM ” terminal and the red one to “ V/ Ω /Hz ”

terminal.

4-2-2 ． Switch the knob to a proper DCV range, then, connect the test leads

cross the measured circuit, the voltage and polarity of the point which connected

with the red test lead will be displayed.

NOTE

1 ． If the voltage under measured is unclear beforehand, should set the range knob to the

highest range, then, switch to a proper range according to the displaying value.

．

If LC D

displays

“ 1

”

，

it means overrange, the range knob must be switched to a higher rang e.

2 ． D o not input a voltage over 1000V

or the meter might be damaged.

3 ． Be careful when measuring high voltage circuit.

4-3

． ACV

ACV

measurement

4-3-1 ． Apply the black test leads to “ COM ” terminal and the red one to “ V/ Ω /Hz ”

terminal.

4-3-2

．

Set the range knob to a prop er ACV range, then, connect the test leads

cross to the measured circuit.

NOTE:

1 ． If the range under measured is unclear beforehand, should set the range knob to the

highest range, then, switch to a proper range according to displaying value. ． If LCD

displays “ 1 ”

it means overrange, should set the range knob to a higher range.

2. The remained digits do not affect on measuring accuracy.

3. D o not input a voltage over 1000V rms

or,

the meter might be damaged.

4 ． Be careful when measuring high voltage circuit.

4-4

． DC

current

measurement

4-4-1

．

Apply the black test leads to “ COM

”

terminal and the red one to “ m A

”

ter minal

（ Max.200 mA

），

or the red test lead to “ 20A ” terminal （ max. 20A ） .

4-4-2 ． Set the range knob to a proper DCA current range, then, connect the meter to the

measured circuit, the measured current value and the current polarity which the

red test lead connect will be displayed on LCD.

NOTE:

1 ． If the range under measured is unknown beforehand, should set the range knob to the

highest range, then, switch to a proper range according to the displaying value ; If LCD

displays “ 1

”

， it means overrange, the range knob must be set to a higher range.

2 ． T he max. input current is 200 mA or 20A （ subject to the position where the red test

lead insert

），

large current may blow the fuse. Be careful especially at 20A range,

because there is no fuse protection at this range, large current may heat the circuit,

even damage the meter.

4-5

． AC

current

measurement

4-5-1 ． Apply the black test lead to “ COM ” terminal ， and the red one to “ m A ” ter m

（ max. 200 mA

），

or the red teat lead to “ 20A ” terminal （ max. 20A

）；

4-5-2 ． Set the range knob to a proper AC

current range, then, connect the meter to the

circuit under measured.

NOTE:

．

If the current range under measure is unknown beforehand, should set the range knob

the highest range, then, switch to the proper range according to the displaying value. If

LCD displays “ 1

”

， it means overrange, must set the range knob to a higher range.

．

T he max. input current is 200 mA or

20A

（ subject to the position where the red test lea d

insert

），

large current might blow the fuse

，

be careful especially at 20A range, becaus e

there is no fuse protection at this range, large current may heat the circuit, even damage

the meter.

3. The remained digits do not affect on measuring accuracy.

4-6

． Resistance

Resistance

measurement

4-6-1 ． Apply the black test lead to “ COM ” terminal ， and the red one to “ V/ Ω /Hz ”

terminal.

4-6-2 ． Set the range knob to a proper resistance range, connect the test leads across the

resistance under measured.

NOTE:

．

If the resistance value is over the selected range value, “ 1

”

displays, thus, should se t to

a higher range. When measuring value is over 1M Ω ， the reading needs a few seconds

to be stable. It's normal for high resistance measuring.

2 ． When input terminal is open-circuit, overload displays.

3 ． Before measuring in-line resistance, be sure that power is off and all capacitance are

released.

4 ． D o not input voltage at this range.

4-7

． Capacitance

Capacitance

measurement

Set the knob to proper capacitance range, and insert the capacitor under tested.

NOTE:

1 ． If the capacitance is unknown beforehand, should set the range knob to the highest

range

then, switch to a proper range according to the displaying value.

“ 1

”

displa ys,

it means overrange, should set to a higher range.

2 ． Before taking measurement, LCD displaying might not be zero, the remaining will

become smaller and smaller, it can be ignored. .

3. If creeps seriously or the capacitor is breakdown when measuring large capacitance,

some digits are displayed and unstable.

4. Before measuring, should release the capacitor completely to avoid damage.

5. unit: 1 uF =10 00 nF 1nF=10 00 pF

4-8.

Transistor

hFE

4-8-1. Set the range to “ hFE ” range.

4-8-2. Select NPN or PNP

insert separately emitter

base and collector to proper

terminal.

4-9

． Diode

Diode

and

continuity

test

4-9-1 ． Apply the black test lead to “ COM ” terminal ， and the red one to “ V/ Ω /Hz ”

terminal （ the polarity of the red test lead is “ +

”

） .

4-9-2 ． Set the range knob to “

”

， connect the test leads to the diode under measured ,

and the reading is close to the value of diode forward voltage drop.

4-9-3 ． Connect the test leads to two points of circuit under measured, if the built-in buzze r

sounds, the resistance between two points is less than approx. (70 ± 20) Ω .

NOTE:

Do not input voltage at “ ” range to avoid damage the meter.

4-10

． Frequency

Frequency

measurement

4-10-1 ． Apply the test leads or shield cable to “ COM ” and “ V/ Ω /Hz ” terminal.

4-10-2 ． Switch the range knob to frequency range, connect the test leads across to the

signal source or the measured load.

NOTE:

1 ． When input is over 1 0V rms ， reading is possible but maybe overrange.

2 ． It's better to use shielding cable on noisy condition when measuring small signal.

3 ． Be careful when measuring high volt circuit.

4 ． Do not input a voltage over 250V DC or AC peak factor to avoid to damage the meter.

4-11

． Conductance

Conductance

measurement

4-11-1 ． Apply the black test leads to “ COM ” terminal, and the red one to “ mA ”

terminal.

4-11-2

．

Set the range knob

“ nS

”

range, connect the test leads to the insulating resistan ce

under measured.

4-12

． DATA

DATA

HOLD

PRESS “ HOLD ” key, the current data will be hold on LCD.

4-13.

Auto

Power

Off

After working (20 ± 10) minutes, the meter will be auto power off and to be sleeping

mode. Press POWER key twice to restart the power.

4-14.

BACKLIGHT

Press B/L key to turn on the backlight, and press it again to turn off.

NOTE: When turning on backlight, the working current will be enlarged, it leads to

shorten battery usage and enlarge accuracy of some functions.

． Maintenance

Maintenance

Do not try to modify the electric circuit.

5-1 . Keep the meter away from water, dust and shock.

5-2 . Do not store and operate the meter under the condition of high temperature, high

humidity, combustible, explosive and strong magnetic place.

5-3 . W ipe the case with a damp cloth and detergent, do not use abrasives and alcohol.

5-4 . I f do not operate for a long time, should take out the battery to avoid leakage

5-5 . Change fuse

When replacing fuse, to use the same type and specification

the

meter

does

not

work

properly,

check

the

meter

following:

MB-9807-62

CONDITIONS

WAY

TO SOLVE

NO DISPLAYING

● T he power is not turned on

● HOLD key

● Replace battery

symbol displays

● Replace battery

NO CURRENT

INPUT

● Replace fuse

BIG ERROR

● Replace battery

Brand	Victor
Model	VC9807A+
Category	Multimeter
Language	English

Victor VC9807A+ User Manual

Questions and Answers:

Victor VC9807A+ Specifications

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