Victor 88C User Manual

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Page 1

VICTOR 88C

User’s Manual for VICTOR 88C Digital

Multimeter

Contents

I. Summary …………………………………………

II. For purchasers of this multimeter ……………

III. Unpacking inspection …………………………

IV.

Features ………………………………………

Operation method ……………………………

VI. Device maintenance ……………… …………

VII. Trouble shoot …………………………………

I.I.I.

Summary

This series product is a stable and battery-driven 3 1/2 digital

multimeter with high reliability. It adopts LCD screen with character

height of 28mm; with functions including unit sign/backlight and

overload protection, it is easy to use.

This series of device can be used to measure DCV,

ACV,

DC,

AC, resistance, capacitance, inductance, diode, triode, open circuit,

temperature and frequency, as well as hold peak value. As an

instrument with excellent performance it adopts double integr al A/D

converter as its core.

II.

For

purchasers

ofofof

this

multimeter

1.1.1.

Safety

notice

This series of device is designed according to IEC1010

standard (safety standard issued by International Electrotechnical

Committee). Please read these safety notices before using it.

1-1. Never input DC higher than 1000V or AC higher than 750V

virtual voltage as measuring voltage;

1-2. The v oltage low er than 36V is safe. Please confi rm the

earthing, connection and isolation of pencils to avoid electric shock

when measuring the voltage of DC higher than 36V or AC higher

than 25V;

1-3. Pencils should be away from test points when switching

function or range;

1-4. Select correct function and range and beware of miss-

operation.

You

may still be careful to ensure the safety even the

device has range protection functions.

1-5. Never input current higher than 20A when measuring current;

1-6. Introduction for safety sign

“ “ Dangerous vo ltage existing; “ ” Earthing; “ ” Double

isolation; “ ” Shall refer to the user’s manual; ” ” Low battery .

III.

Unpacking

inspection

Open the package to check if all parts and accessories are all right

in the box

1. Multimeter 1

2. Battery (9V) 1

3. Leather case 1

4. Vibration proof sheath 1

5. Acceptance certificate 1

6. Crocodile clip 1 pair

7. T emperature probe (banana type) 1 pair

8. T esting accessory 1

9. Pencil (20A) 1 pair

10. User’s manual 1

IV.

Features

1.1.1.

General

features

1-1. Display mode: LCD;

1-2. Max display: 1999 (3 1/2) digits automatic polarity display;

1-3. Measurement method: double integral A/D conv ersion;

1-4. Sampling rate: about 3 time per second;

1-5. Over-range display: the highest digit displays “ OL ” or “ -OL ” 1-6. Low voltage display ： ” ” ; 1-7. Working environment: (0 ～ 40) ℃,relative humidity: <80%;

1-8. Power supply: one 9V battery (6F22 or equivalent model);

1-9. Dimension: 189m m * 97 mm * 35mm(length*width*height);

1-10. Weight: about 400g (i ncluding 9V battery);

2.2.2.

Technical

features

2-1. Accuracy: ± (a% × reading data + c haracter n umber), ensure in

accuracy environment temperature:

(23 ± 5) ℃,relative humidity <75%, and the calibration warranty

period lasts for one year from the date of leaving the factory .

2-2. Performance ( ▲ i ndicates the function is available for this

model)

2-3. Technical index

2-3-1.

DCV

Input impedance: All range is10M Ω ;

Over load protection: 250V D C or 205 V A C peak value for range

200mV; 1000V D C or 1000V AC peak value for other.

2-3-2.

ACV

Input impedance: All range is10M Ω ;

Over load protection: 250V D C or 205 V A C peak value for range

200mV; 1000V D C or 1000V AC peak value for other.

Frequency response: 40~400Hz for range under 200V ; 40~100Hz

for range 750V;

Display: Sine wave virtual value (AVG value response).

2-3-3.

DCA

MAX measurement v oltage d rop: 200mV;

Model

Function

VICTOR 88C

DCV▲ACV▲DCA▲ACA▲Resistance Ω

▲

Diode/ Open circuit

▲

Triode hFE

▲

Capacitance C

▲

T emperature ℃

▲

Frequency f

▲

Inductance L

▲

Auto power off

▲

Backlight

▲

Peak value holding

▲

Range

Accuracy

Resolution

200mV

± (0.5%+3)

100uV2V1mV

20V

10mV

200V

100mV

1000V

± (1.0%+5)

Range

Accuracy

Resolution

200mV

± (1.2%+3)

100uV

± (0.8%+5)

1mV

20V

10mV

200V

100mV

750V

Range

Accuracy

Resolution

2mA

± (0.8%+3)

1uA

20mA

10uA

200mA

± (1.2%+4)

100uA

20A

± (2.0%+5)

10mA

Page 2

Max input current: 20A (no more than 10 seconds);

Over load protection: 0.2A / 250V self-healing fuse f or ranges under

200mA, 12A / 250V quick acting fuse for range 20A.

2-3-4.

ACA

MAX measurement v oltage d rop: 200mV;

Max input current: 20A (no more than 10 seconds);

Over load protection: 0.2A / 250V self-healing fuse f or ranges under

200mA, 12A / 250V quick acting fuse for range 20A.

Frequency response: 40~200Hz;

Display: Sine wave virtual value (AVG value response).

2-3-5.

Resistance

(((

ΩΩΩ

)))

Open circuit voltage: l ower than 3V;

Over load protection: 250V DC or A C peak v alue;

Caution: a) If in range 200 Ω,please short pencils and m easure

lead resistance, and then subtract the resistance from the

value measured.

b) It is normal to show 10M Ω when pencils shorted in range

2000M Ω,it w ill not effect the accuracy and shall be subtracted

from the value measured. For example: The object resistance

is 1000M Ω,the reading value is 1010M Ω,then the correct

value shall be 1010 – 10 = 1000M Ω .

c) Lagged showing of v alue is normal w hen measuring

resistance higher than 1M Ω . Please wait until the display is

stable.

2-3-6.

Capacitance

(C)

Range

Accuracy

Resolution

2mA

± (1.0%+5)

1uA

20mA

10uA

200mA

± (2.0%+5)

100uA

20A

± (3.0%+10)

10mA

Range

Accuracy

Resolution

200 Ω

± (0.8%+5)

0.1 Ω

2k Ω

± (0.8%+3)

1 Ω

20k Ω

10 Ω

200k Ω

100 Ω

2M Ω

1k Ω

20M Ω

± (1.0%+15)

10k Ω

2000M Ω

± [5%( 读数 – 10 )+ 20]

1M Ω

Range

Accuracy

Resolution 20nF

± (2.5%+20)

10pF

200nF

100pF

2uF

1nF

T esting frequency: 100Hz;

Over load protection: 36V DC or AC peak value;

2-3-7.

Inductance

(L)

T esting frequency: 100Hz;

Over load protection: 36V DC or AC peak value; 2-3-8. T emperature ( ℃ )

Thermocouple (plug of banana type).

2-3-9.

Frequency

(f)

Input sensitivity: higher than 3.5V V

P-P

;

Over load protection: 250V DC or AC peak value(less than 10

seconds);

2-3-10.

Diode

and

open

circuit

test

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

Warning: Never input voltage in this range.

2-3-11 Measuring triode’s hFE parameter

20uF

10nF

200uF

± (5.0%+5)

100nF

Range

Accuracy

Resolution

2mH

± ( 2.5%+20)

1uH

20mH

10uH

200mH

100uH

1mH

20H

10mH

Range

Accuracy

Resolution

(- 2 0 ~ 1000) ℃

± (1.0%+4) < 400 ℃

± (1.5%+15) ≥ 400 ℃

1 ℃

Range

Accuracy

Resoluti

2kHz

± (0.5%+4)

1Hz

20kHz

10Hz

200kHz

100Hz

2000kHz

1KHz

10MHz

10KHz

Range

Value displayed

Test

condition

Diode forward voltage drop (Unit: mV)

Forward DC: about 1mA, rev erse voltage: about

3V.

Buzzer sounds continuously, resistance between two test points is less than 70 Ω± 20 Ω .

Open circuit voltage is about

3V.

Range

Display

range

Test

condition

h FE , NPN or PNP

0 ~ 1000

base electrode current is about 10uA, and Vce is about 3V

V.V.V.

Operation

method

5-1.

Operation

panel

introduction

1. LCD: display the measured v alue and the unit;

2. Function keys

2-1. Power switch: turn on /turn off power;

2-2. PK H OLD: Pressing this key w ill hold all max value measured

in the screen showing sign “ PH ” ; press again, "PH" will disappear

and exit the status of peak value holding.

2-3. B/L switch to enable backlight which will be turned off auto

after about 5 seconds.

2-4. DC/AC: select D C/AC working mode.

3. Rotary switch: to change measurement function a nd range;

4. Jack for measurement of v oltage, resistance and frequency;

5. Common ground: positive input for capacitance (Cx), inductance

(Lx), triode and temperature.

6. Positive jack for current lower than 200mA; negative input for

capacitance ( Cx), inductance (Lx), triode and temperature.

7. Jack for current 20A.

Please refer to the figure:

5-2.

Voltage

measurement

1. Insert the black pencil into the “ COM ” jack, a nd the red one into

the “ V/ Ω /Hz ” jack;

2. Turn the switch to position “ V ” . If the level of voltage to be

measured is unknown then select the biggest range and then

decrease the range step by step until getting the value with the

highest resolution.

3. Popup the key “ DC/AC ” to enter into DC mode if measuring DC;

Press down the key “ DC/AC ” to set into AC mode.

4. The screen will show the voltage measured if touch the testing

point using the pencils; the point touched by the red pencil is in

positive voltage if the value s howed is positive.

Notice:

Page 3

1. As s howed, “ OL ” indicates the range is over and shall switch to a

higher range.

2. The voltage to be tested shall not o ver DC 1000V or A C 750V.

The pencils shall be away from the testing point as switching

functions o r ranges.

3. When measuring high v oltage circuit, any parts of your body

should not touch the high voltage circuit, otherwise it may hurt your

body.

5-3.

Current

measurement

1. Insert the black pencil into the “ COM ” jack, a nd the red one into

the “ mA ” or “ 20A ” jack.

2. Turn the switch to position “ A ” . If the level of current to be

measured is unknown then select the biggest range and then

decrease the range step by step until getting the value with the

highest resolution.

3. Popup the key “ DC/AC ” to enter into DC mode if measuring DC;

press down the key “ DC/AC ” to set into AC mode.

4. The screen will show the value of current measured if connect in

parallel the pencil to the circuit to be tested; the point touched by

the red pencil is i n positive voltage if the value s howed is positive.

Notice:

1. As s howed, “ OL ” indicates the range is over and shall switch to a

higher range.

2. The input in “ mA ” jack shall not over 200mA and “ 20A ” not over

20A (less than 10 seconds of testing duration) as measuring

current; the p encils shall be away from testing points as switching

function or range.

5-4

Resistance

measurement

1. Insert the black pencil into the “ COM ” jack, a nd the red one into

the “ V/ Ω /Hz ” jack;

2. Turn the range switch to resistance p osition, then bride two

pencils at the two ends of the resistor.

Notice:

1. "OL ” will be d isplayed in screen if the resistance is over the r ange ,

then you shall increase the range by one step;

2. When input is open circuit, it will display status of ove rload;

3. When measuring resistance on line, ensure that all power of

circuit tested are turn down and all capacitor are discharged

completely;

4. Never input voltage if in resistance measurement mode!

5. It normal for resistance higher than 1M Ω that the reading data i s

not stable for the first several seconds;

5-5

Capacitance

measurement

1. Switch to a proper range, and insert pencils into “ mA ” and “ com ”

jack.

2. Connect the two pencils i n parallel to the two ends of the

capacitor. Please pay attention to the p olarity, as the “ com ” for

positive a nd “ mA ” for negative.

Notice:

1. If capacitance exceeds the range sel ected, “ OL ” will be di splayed

in screen ， then y ou shall increase the range by one step.

2. The LCD may show some rudimental digits upon the starti ng of

capacitance measurement. It’s normal and will not affect the

testing result;

3. If there is serious creepage or capacitor broken down in high

capacitance range, the digits showed will be random and

unstable.

4. Please discharge capacitor completely to avoid device damage

before measuring capacitance.

5-6.

Inductance

measurement

1. Switch to a proper range, and insert pencils into “ mA ” and “ com ”

jack.

2. Bridge the pencils on the two ends of inductor.

Notice:

1. If inductance ex ceeds the range s elected, “ OL ” w ill be displayed

in screen ， then y ou shall increase the range by one step.

2. The inductance value measured for identical inductor may be

different if there is different impendence;

3. If in range 2 mH, please short pencils a nd measure lead

inductance, and then subtract the inductance from the value

measured.

4. Avoid measuring small inductor in high range, or the accuracy is

not guar anteed.

5-7.

Temperature

measurement

Turn range switch to “ ℃ ”,insert the cathode(black pin) of

cold end (free end) of thermocouple into “ mA ” jack, anode (red

pin) into “ COM ” jack, put the working end (temperature

measurement end) of thermocouple on the surface or inside the

object to be tes ted. Then you can read temperature from the

screen, and the data is in centigrade.

Notice:

1. As the input end is open, it will show environment temperature if

the operation temperature is h igher than 181818℃,

or normal

temperature if lower than 181818

℃ .

2.2.2.

Please

never

replace

temperature

sensor,

ororor

the

accuracy

isisis

not

guaranteed;

3.3.3.

Never

input

voltage

ififif

ininin

temperature

mode.

5-8.

Frequency

measurement

1. Insert pencils or shielded cable into “ COM ” and “ V/ Ω /Hz “ jack;

2. Turn range switch to frequ ency position and bridge pencils or

cables over the signal source o r loa d tested.

Notice:

1. The device can still work if the input is higher than 10V virtual

value, but the accuracy is not guaranteed;

2. In noise e nvironment, you'd better use shield cable to measure

small signal;

3. When measuring high v oltage circuit, any parts of your body

should not touch the high voltage circuit, otherwise it may

hurt your body.

4. N ever input voltage higher than 250V DC or AC peak value,

otherwise it may damage your device.

5-9.

Triode

hFE

1. Turn the range switch to “ hFE ” position;

2. Insert testing accessory into “ mA ” and “ com ” jack. Please pay

attention to the polarity, as the “ com ” for positive and “ mA ” for

negative.

3.Todetermine the triode's t ype, NPN or

PNP,

insert the emitting,

base and collector electrode into the corresponding j acks in

testing accessory.

5-10.

Diode

and

open

circuit

test

1. Insert the black penci l into “ COM “ jack, and the r ed one into the

“ V/ Ω /Hz “ jack (Notice: the red pencil is anode);

2. T urn the range switch to position “ ”,connect pencils in

parallel to the diode tested, with the red pencil to the anode and

the black to cathode, then the reading value will be approximate

forward voltage drop of the diode;

3. Connect pencils to two points of the circuit to be tested, if buzzer

sounds, then the resistance between the two points is lower

than (70 ± 20) Ω .

5-11.

Peak

value

holding

Page 4

Press H OLD, the peak value of current data will be ke ep

displaying in screen; press again to cancel this function.

5-12.

Auto

power

off

After about (20 ± 10)minutes device not being u sed, it will be

powered off automatically and e nter into dormant status, and

press “ POWER ” again for two times to turn on power.

5-13.

Backlight

Press “ B/L ” key to turn on backlight. After 20 seconds, the

backlight will be turn down automatically.

Notice:

When backlight is b right, working current becomes h igher, and

it will short the service life of battery and the error for some other

functions w ill increase.

VI.

Device

maintenance

This series of device i s a kind of precise instrument; please do

not change the internal circuit by your self.

6-1. Pay attention to the waterproof, dustproof and breakproof of

the device;

6-2. Please do not store or use it in environment of high

temperature, high humidity, high flammability or strong magnetic .

6-3. Please clear the device using wet cloth and soft detergent, and

abrasive and drastic solvent such as alcohol are forbidden.

6-4. Please take out battery to prevent device from being erode d by

battery weeping if the device will not be used for a long time;

5-4-1. Be care of the status of batteries. When sign “ “ is

showed in screen, please replace batteries.

6-4-1-1. Remove vibration proof sheath, screw out nut that fixing

battery lid, and remove battery cap;

6-4-1-2.

Take

off 9V batteries, replace with new one. It is

recommended to use al kaline battery for long time of operation;

even any 9V battery is adoptable.

6-4-1-3. Close the battery cap and tighten the screws.(refer to

Figure 2)

6-4-1-4.

Take

on vibration proof sheath.

6-4-2. Replacing fuse

Please replace fuse with an identical one if necessary.

VII.

Trouble

shooting

If you dev ice can not work n ormally, the methods bellow

may help you to solve general problems. If these methods do

not w ork, please contact service center or dealer.

WeWeWe

will

not

give

aaa

further

notice

for

any

change

ofofof

this

manual.

WeWeWe

have

tried

our

best

tototo

confirm

the

correction

ofofof

this

manual

’’’

sss

content.

IfIfIf

you

find

any

mistake

ororor

omit,

please

contact

us.

WeWeWe

will

not

bebebe

responsible

for

any

accidents

ororor

damages

caused

bybyby

miss-

operation.

Functions

described

ininin

this

book

can

not

bebebe

used

asasas

reason

for

special

purpose.

MB － 0088 － 30

Fault

symptom

Inspection

area

and

method

No display



Power is not on



Holding switch;



Replacing battery

sign

appears



Replacing battery

No current

input



Replacing fuse

Too

great

error

displayed



Replacing battery

Victor 88C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual