Victor 81a User manual

VICTOR

81A/81B

Digital

Multimeter

Operation

Manual

一.General

.General

………………………………………………

1

二.Open-Package

.Open-Package

Inspection

……………………………

1

三.

.

Safety

Note

……………………………………………

2

四.

.

Front

Panel&

Button

Function

Description

…………

4

五.

.

Other

Functions

………………………………………

5

六.Property

.Property

………………………………………………

5

七.Instrument

.Instrument

Maintenance

……………………………

1

5

八.Fault

.Fault

Elimination

……………………………………

1

6

1

一、

General

VICTOR 81A/B

is

a

steady performance, high security

3

1/2 digital

multimeter.

It

uses

LCD with

18.9mm

high figure

to make the

reading

clear.

The

digital

multimeter

has

the function of measuring

ACV, DCV,

ACA,

DCA,

Resistance,

Celsius

&

Fahrenheit

Temperature,

Diode, Continuity.

The

instrument also

has

the features of

Unit Symbol

Display,

Auto/Manual

Range

Selection,

Auto

Power

Offer

and

Alarm

Function.

It adopts

the

directly

driven

8

digits

microprocessor

and

dual-integral

A/D

converter,

which

provide the high

resolution,

high accuracy displaying

driver.

Because of

its

outstanding

functions

,

the instrument

is

an

excellent

tool

and most

suitabl e

for

lab,

factory,

maintenance

and

repair

users.

二、 Open-Package

Open-Package

Inspection

Open the gift box and take out the instrument, carefully check the

following accessories. If any accessory is missed or damaged, please

contact the manufactory at once.

● Digital Multimeter 1PC

● Operation Manual 1PC

●

Test

Leads 1SET

● Temperature Probe(K Type Thermocouple)

(Only VICTOR81B) 1PC

● AAA （1.5V ）7# Battery 2PCS

● Holster 1PC

2

三、

Safety

Note

The instrument

is

designed according

to

IEC1010 standard (safety

standard issued by International Electro technical Committee). Please read

the following before operation.

1. Caution

to

avoid the electric shock when measuring voltage higher

than 36V DC, 25AC, current higher than 10mA, AC power line with

inductance load and AC power line during the power fluctuation.

2. Before measuring, should check if the function knob

is

set in the

correct range and make sure the test leads connect reliably, link up

correctly, and insulate properly

to

avoid the electric shock

3. It meets the requirements of the safety standard only

to

use the

instrument with the equipped test leads. If the test leads are broken,

should replace them by the same type and same electric specification

test leads.

4. Do not replace the inside fuse by the unconfirmed one. Only replace

it by the same type and specification fuse. Before replacement,

should keep the test leads off the tested point

to

make sure there

is

no

any signal at the input terminal.

5. Do not replace the inside batteries by the unconfirmed one. Only

replace them by the same type and specification batteries. Before

replacement, should keep the test leads off the tested point

to

make

sure there

is

no

any signal at the input terminal.

6. When measuring electricity,

do

not connect the body with the ground

directly, and

do

not touch the possible exposed metallic terminal,

3

output socket or lead clamp with ground potential. Usually use the

dry cloth, rubber overshoes, rubber cushion and other insulated

materials

to

keep the body isolated with the ground.

7. Do not store and use the instrument in high humility, high

temperature, combustible, explosive and strong magnetic places.

8. It

is

possible

to

damage the instrument and endanger the safety of the

users when measuring the voltage over the limit. The allowed

maximum voltage

is

printed on the front panel of the instrument,

do

not measure the value over the standard safety voltage,

do

not input

the range limit specified

to

void the electric shock and instrument

damage.

9. Do not measure any voltage when connecting the test leads with the

current terminal

to

avoid damaging the instrument and endangering

the safety of the users.

10. Do not try

to

calibrate or repair the instrument, should operate it by

the specially trained or qualified professional people.

11. The function/range selection knob should be set in the correct range

when measuring. When switching the function/range selection knob,

keep the test leads off the tested object

to

make sure there

is

no

any

signal at the input terminal. Do not switch the f unction/range

selection knob when measuring.

12. When LCD displays “ ”

,

please replace the batteries in time

to

make sure the measuring accuracy.

13. Do not allow

to

measure the voltage when connecting the test leads

with the current terminal!

4

14. Do not try

to

modify the inner circuit at will

to

avoid damaging the

instrument and endangering the safety of the users.

15 ．

Safety Symbol Description

：

四、

Front

Panel

&

Button

Function

Description

1. Instrument Model Number

2.LCD Display ：Display the measured data and unit.

3.Function Button

3.1.MAX （Max

Value

Hold

）

: Press the button, the reading

is

renewe d

and the max value

is

held on LCD.

3.2.SELECT （Function Switch

）：

Press the button, DC/AC mode,

/ , ℃/℉performance switch.

3.3.HOLD

（Data Hold

）：

Press the button, the reading

is

locked, press t he

button again, the lock

is

cleared.

3.4.RANGE （Auto/Manual Range Switch ）: Auto Range

is

the original

states, press the button

to

switch

to

the Manual Range. At the Manual

Warning!

DCA

High

Voltage

!

Dangerous!

ACA

GND

DCA

&

ACA

Dual

Insulation

Meets

the

direction

of

European

IEC

Low

Battery

Fuse

5

Range mode, press the button once, the range

is

switched

to

the higher

one, press the button again

to

switch the range

to

the lowest one when

measuring the highest range, the cycle

is

in proper order from low

to

high. Keep pressing the button for 2 sec., return

to

Auto Range mode.

4.Knob Switch ：Change the measuring

function and range 。

5.Input Terminals

5.1.Current 、V oltage 、Diode 、

Resistance 、Buzzer 、

Temperature “ - ” Input terminal.

5.2.10A “ + ” input terminal.

5.3.V oltage 、Diode 、Resistance 、

Buzzer 、Temperature and Current

less than 200mA “ + ” input terminal.

五、 Other

Other

Functions

Stop working for 15 seconds during measurement, the instrument will be

auto power off (sleeping mode)

to

save the power; in the auto power offer

mode, press any function button or change the knob switch, the instrument

will get into the auto power on mode (working mode); the auto power offer

mode will be cancelled by pressing the HOLD button

to

turn on the

instrument.

六、

Property

1

．

General

Property

1-1 ．

Display

：LCD

1-2 ．Max

Display

：1999 （3 1/2 ）

counts

automatic polarity display

and

unit

display

6

1-3 ．Measuring Method ：

Dual integral

A/D converter

1-4 ．

Sampling

Rage ：

Approx.

3

times

/

sec.

1-5 ．

Over range Indication

：

Display

“ OL ”

1-6 ．

Low Battery Indication

：“ ”

symbol

appearance

；

1-7 ．

Operation

Environment

：（

0～40 ） ℃ ，

Relative

Humidity: ＜80% ；

1-8 ．

Storage

Environment

：（

0～50 ）℃，

Relative

Humidity: ＜80% ；

1-9 ．Power ：

2pcs

1.5V

batteries

（“ AAA ” 7#

battery

）；

1-10 ．Dimension （size

）：

145 × 74 ×

36mm

1-11

．

Weight

：

Approx.

185g （

Including

2pcs

1.5Vbatteries

）

1-12

．

Accessories

：

1pc

operation

manual

，

Holster

、

1pc

gift

box

，

1

set

10A

lest

leads

、1pc

K

Type

Temperature

Probe

TP01

(only

VICTOR81B) and

2pcs

1.5

batteries

。

2

．

T echnical

Property

2-1 .

Accuracy:

± (% ×

reading

＋

digits)

，

at

(23 ± 5) ℃ ，

relative

humidity ＜75%

，

One

year

calibration

guarantee since the time dispatched

from

the

factory.

。

2-2 .

Performance

（note “▲”

indicates

the instrument

has

the function

）

Model

Function

VICTOR81A

VICTOR81B

DCV

▲

ACV

▲

DCA

▲

ACA

▲

Ω

▲

Diode/Continuity

▲

Celsius/Fahrenheit ℃/℉

*

▲

7

2-3.Technic Specification (note “ * ” indicates the instrument does not have

the range)

2-3-1.DCV

1.

Insert

the red

and

black

test

leads

separately

to

and COM

input

mA

V

terminals.

2.

Turn

the

knob

switch

to

Range,

press

“ SELECT ”

button

to

switch

to

DCV

measurement

mode.

3.

This range

is

200mV,

The reading

to

measure the voltage less than

200mV

is

much accurate and stable than the reading measured in the

Range “ ” .

4.

Turn the knob switch

to

“”Range.

5.

Auto range mode

is

the original states, it displays “ AUTO ” symbol, Press

“ RANGE ” button

to

switch

to

Manual range mode, can select 200mV

、

2V 、20V 、200V 、600V Range.

6.

Connect the test leads

to

the tested point, the voltage and polarity of

point connected by red lead will be displayed on LCD.

Note

：

1.

At the Manual Range mode, if “ OL ”

is

displayed on LCD, it indicates the

tested voltage value has exceeded the present range limit, please select

the higher range

to

complete the measurement.

2.

Do not measure the voltage higher than

600V.

Otherwise, there

is

the

danger

to

damage the instrument.

3.

When measuring the high voltage, caution

to

avoid the body touches the

high voltage.

8

Input Impedance ：>10M Ω at Range 200mV

,

40M Ω at other Ranges 。

Overload Protection ：600V AC or 600V AC Peak Value ；

2-3-2.

ACV

1. Insert

the red

and

black

test leads

separately

to

and COM

input

mA

V

terminals.

2.

Turn

the

knob

switch

to

Range,

press

“ SELECT ”

button

to

switch

to

ACV measurement

mode.

3.

This range

is

200mV,

The reading

to

measure the voltage less than

200mV

is

much accurate and stable than the reading measured in the

Range “ ” .

4.Turn the knob switch

to

“”Range.

5.Auto range mode

is

the original states, it displays “ AUTO ” symbol,

Press “ RANGE ” button

to

switch

to

Manual range mode, can select

200mV 、2V 、20V 、200V 、600V Range.

6．Connect the test leads

to

the tested point, the voltage and polarity of

point connected by red lead will be displayed on LCD.

Note

：

1.

At the Manual Range mode, if “ OL ”

is

displayed on LCD, it indicates the

Accuracy

Range

VICTOR81A

VICTOR81B

Resolution

200mV

± (0.5%+4d)

100uV

2V

1mV

20V

10mV

200V

100m A

600V

± (1.0%+4d)

1V

9

tested voltage value has exceeded the present range limit, please select

the higher range

to

complete the measurement.

2.

Do not measure the voltage higher than

600V.

Otherwise, there

is

the

danger

to

damage the instrument.

3.

When measuring the high voltage, caution

to

avoid the body touches the

high voltage.

Input Impedance ：>10M Ω at Range

200mV,

40M Ω at other ranges 。

Overload Protection ：600V DC or 600V AC Peak Value ；

Frequency Response

：（

50 ～200 ）Hz

Display ：Average value response (RMS of sine wave) .

2-3-3.

DCA

1.

Insert

the

black

test

lead

to

the

COM

input

terminal,

and

red

test

lead

to

mA

V

input

terminal

(max 200 mV

)

or

10A

input

terminal

(max 10A).

2.

Turn

the

knob

switch

to

Current

Range,

press

“ SELECT ”

button

to

switch

to

DCA

measurement

mode.

Connect the test leads

to

the tested point in

series, the current value and polarity of point connected by red lead will

be displayed on LCD simultaneously.

3.

Press “ RANGE ” button

to

select auto or manual range mode.

Accuracy

Range

VICTOR81A

VICTOR81B

Resolution

200mV

± (1.5%+20d)

100uV

2V

± (0.8%+6d)

1mV

20V

10mV

200V

100mV

600V

± ( 1.0 %+6d)

1V

10

Note

：

1.

Firstly users should select the auto range mode, if users had

no

idea

about the range of tested current, and then select the proper range based

on displaying value.

2.

If “ OL ”

is

displayed on LCD, it indicates the tested current value has

exceeded the present range limit, please select the higher range

to

complete the measurement.

3.

Max input value

is

200mA or 10A （Depending on the terminal the red

test lead

is

inserted ）.

The input value

is

exceeding the range limit, the fuse will be melt, even

damage the instrument.

Max measurement voltage drop ：Full Range mA

is

1.2V ，

A is

100mV ；

Max input current ：10A （less than 15 seconds

）；

Overload Protection ：0.2A/250V restorable fuse ，10A/250V fuse.

2-3-4.

ACA

1.

Insert

the

black

test

lead

to

the

COM

input

terminal,

and

red

test

lead

to

mA

V

input

terminal

(max 200 mV

)

or

10A

input

terminal

(max 10A).

2.

Turn

the

knob

switch

to

Current

Range,

press

“ SELECT ”

button

to

switch

to

Accuracy

Range

VICTOR81A

VICTOR81B

Resolution

200uA

± ( 1.0 %+ 10 d)

0.1uA

2000uA

1uA

20mA

10uA

200mA

100uA

10A

± (1. 2 %+1 0 d)

10mA

11

ACA measurement

mode.

Connect the test leads

to

the tested point in

series, the current value and polarity of point connected by red lead will

be displayed on LCD simultaneously.

3.

Press “ RANGE ” button

to

select auto or manual range mode.

Note

：

1.

Firstly users should select the auto range mode, if users had

no

idea

about the range of tested current, and then select the proper range based

on displaying value.

2.

If “ OL ”

is

displayed on LCD, it indicates the tested current value has

exceeded the present range limit, please select the higher range

to

complete the measurement.

3.

Max input value

is

200mA or 10A （Depending on the terminal the red

test lead

is

inserted ）.

The input value

is

exceeding the range limit, the fuse will be melt, even

damage the instrument.

Max measurement voltage drop ：Full Range mA

is

1.2V ，

A is

100mV ；

Max input current ：10A （less than 15 seconds

）；

Overload Protection ：0.2A/250V restorable fuse ，10A/250V fuse.

Accuracy

Range

VICTOR81A

VICTOR81B

Resolution

200uA

± (1. 5 %+ 10 d)

0.1uA

2000uA

1uA

20mA

10uA

200mA

100uA

10A

± ( 2 .5%+15d)

10mA

12

Frequency Response ：10A Range (50 ～200)Hz ，

2-3-5.Resistance

（Ω

Ω

）

1. Insert

the red

and

black

test leads

separately

to

and COM

input

mA

V

terminals.

2.

Turn

the

knob

switch

to

“Ω

Ω

”

Range,

connect the

test leads cross

with the

tested

resistor.

3.

Press “ RANGE ” button

to

select auto or manual range mode.

4.

When

measuring the

min.

resistance

,

please short-circuit

the

test leads

at

first

to

test

the wire

resistance,

and

then deduct

it

from

the

actual

resistance.

Note

：

1.

Firstly users should select the auto range mode, if users had

no

idea

about the range of tested current, and then select the proper range based

on displaying value.

2.

If “ OL ”

is

displayed on LCD, it indicates the tested resistance value has

exceeded the present range limit, please select the higher range

to

complete the measurement. When measuring the Resistor higher than

1M Ω

,

the instrument will take several seconds

to

make the reading

stable, it

is

normal when measuring the high resistor.

3.When the input terminal

is

open circuit, it will display “ OL ” .

4.

When measuring in line resistor, be sure that the power

is

off and

all

capacitors are released completely.

13

Open

Voltage

circuit ：Less than 200mV ；

Overload Protection ：250V DC or AC Peak Value ；

Note ：When measuring at Range 200 Ω

,

please

short-circuit

the

test leads

at

first

to

test

the wire

resistance,

and

then deduct

it

from

the

actual

resistance.

2-3-6.Diode

and

Continuity

Test

1. Insert

the

black test

lead

to

“ COM ”

terminal

and

the red

test

lead

to

“ ”mA

mA

V

terminal

(the polarity of red lead

is

“ + ”

)

2.

Turn the knob

to

range ,press “ SELECT ” button

to

select the

Diode measurement mode.

3.

Forward Measurement: connect test leads with the diode under tested,

the red test lead connect

to

diode positive polarity, the black test lead

to

diode cathode polarity, the reading

is

the approx. value of diode forward

volt drop .

4.

Backward Measurement: the red test connect

to

diode positive polarity,

the black test lead

to

diode cathode polarity ,the LCD displays “ OL ” .

5.

The complete diode testing includes forward and backward

measurement, if the result isn ’ t meet the above, it means the diode

is

bad.

Accuracy

Range

VICTOR81

A

VICTOR8 1

B

Resolutio

n

200 Ω

± (0.8%+5d)

0.1 Ω

2k Ω

± (0.8%+4d)

1 Ω

20k Ω

10 Ω

200k Ω

100 Ω

2M Ω

1k Ω

20M Ω

± (1.2%+ 10 d)

10k Ω

14

6.

Press “ SELECT ” button

to

select the Continuity measurement mode.

7.

Insert test leads

to

two points of tested circuit, if the inner buzzer sounds,

the resistance

is

less than 50 Ω .

Overload Protection: 250V DC or AC Peak Value.

CAUTION ：DO NOT INPUT VOLTAGE

AT

THIS RANGE!

2-3-7.Celsius/Fahrenheit( ℃/℉)(Only VICTOR81B)

1.

Switch the knob to “ ℃/℉” range, press “ SELECT ” button

to

switch

to

“℃” and “ ℉” measurement mode.

2.

Insert the cathode(black pin) of cold end (free end) of thermocouple into

“ COM ” jack, anode (red pin) into “ ” terminal, put the working endmA

mA

V

(temperature measurement end) of thermocouple on the surface or inside

the object

to

be tested. Then you can read temperature from the screen,

and the data

is

in Centigrade.

Note

：

1.

When the input terminal open-circuit ,it will display the normal

temperature.

2.

Don ’ t change the temperature probe optionally ,or the value accuracy

isn ’ t guarantee.

3.

Don ’ t input voltage at temperature range.

Range

Display

Test

Condition

Forward V oltage Drop of

Diode

Forward DC Current is

Approx. 0.5mA ，

Backward

Voltage

is

Approx. 1.5V

Buzzer makes a long

sound while resistance is

less than 50 Ω

Open circuit voltage is

Approx. 0.5V

15

Sensor ：K Type Thermocouple (banana plug) 。

CAUTION ：DO NOT INPUT VOLTAGE

AT

THIS RANGE!

七、 Instrument

Instrument

Maintenance

I

nstrument

is

a high accuracy instrument, please don ’ t modify the circuit.

1．Keep the instrument away from water, dust and shock.

2．Do not store and operate the meter under the condition of high

temperature, high humidity, combustible, explosive and strong

magnetic place.

3

．

Wipe the case with a damp cloth and detergent,

do

not use abrasives an d

alcohol.

4.

If

do

not operate for a long time, should take out the battery

to

avoid

leakage.

5.When ” ” symbol displays, should replace the battery following the

steps:

5-1 ．Unlock the screw and remove the battery case;

5-2 ．Take out the old battery and replace the new one. It's better

to

use

alkaline battery for longer life.

5-3 ．Fit on the battery case and lock the screw.

Note

：

1.

Don ’ t input the voltage value higher than DC 1000V or AC Peak Value.

Accuracy

Range

Accuracy

Resolution

(-20 ～1000) ℃

＜400 ℃± (1.0%+5d)

≥ 400 ℃± (1.5%+15d)

1℃

（0～1832 ） ℉

± (1.5%+15d)

1℉

16

2.

Don ’ t measuring the voltage at current, resistance, diode and continuity

range.

3.Don ’ t use the instrument when the battery isn ’ t installed or the back case

isn ’ t firm.

4.

When replacing battery or fuse, please take away the test leads from the

measured point and power off at first.

八、 Fault

Fault

Elimination

If the instrument does not work properly, check the instrument

as

following:

The

specifications

are

subject

to

change

without

notice.

The

content

of

this

manual

is

regarded

as

correct,

error

or

omits

Pls.

contact

with

factory.

We

hereby

will

not

be

responsible

for

the

accident

and

damage

caused

by

improper

operation

.

The

function

stated

for

this

operation

manual

cannot

be

the

reason

of

special

usage.

Fault

Solution

No Display

● Turn on power ；

● Replace battery.

symbol

appearance

● Replace battery.

Big error value

● Replace battery.

Victor 81A User manual

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