Mastech MS8236 Manual de usuario

MASTECH® M!iBi!36

NETWORK MULTIMETER§

OPERATION MANUAL

MASTECH® MASTECH®

COI\IYEI\IY!i

Safety Information

1.1

Preliminary

1.2 Dos And Don'ts

1.3 Symbols

1.4 Precautions

2. Description 4

2.1

Names OF Parts

2.2 Switches, Buttons And Input Jacks

2.3 Display

3. Specifications

3.1

General

3.2 Technical Index

4. Operation Instruction 13

4.1 Function Switching

4.2 Range Switching

4.3 Maximum Value Measurement.

4.4 Reading Holding

4.5 Backlight Source

4.6 Use of the test key

4.7 Preparation For Measurement.

4.8 Measurement Of DC Voltage 15

4.9 Measurement Of AC Voltage

COI\IYEI\IY!i

4.10 Diode Test.

4.11 Circuit Continuity Test

4.12 Resistance Measurement.

4.13 Measurement Of DC Current

4.14 Measurement Of AC Current.. 20

4.15 Phone Line Mode Detection

4.16 Judgment And Tracking Of Cable Line 23

4.17 Network Cable Integrity Test.. 24

4.18 Non-Contact Voltage Detection 26

4.19 Operating Precautions Of

Protective Cover 27

4.20 Automatic Power Off 28

5. Maintenance 28

5.1

Replacement

Batteries 28

5.2 Replacement Of Fuse 29

5.3 Replacement Of Test Probes 30

6. Accessories

MASTECH® MASTECH®

1. Safety Information 1.1.4 The test probes must be kept in good

condition.

Check

whether

the

insulation

of the

test

probes

&.WARNING

has been damaged and

whether

any wire has

BEEXTREMELY CAREFUL WHEN USINGTHE METER been exposed.

Improper useofthis device can result in

electric

shock 1.1.5 Using the

test

probes supplied can ensure safety.

destruction

ofthe meter. Takeall normal

safety

If required, they must be replaced with those of

precautions

and

the

safeguards

suggested inthis the same model or class

manual.

1.2 Dos and Don'ts

exploit

full

functionality

of the meter and ensure safe 1.2.1 Use the right input

jack, function

and range.

operation,

Protection provided bythe

instrument

will be

impaired if used in

manner not

specified

bythe 1.2.2 Do not take measurements beyond the

protection

manufacturer. limits indicated in the

specifications.

1.2.3 Do not touch the metal tips of the test probes when

The Auto Range Digital

Multimeter (hereinafter

referred connecting the meter to the

circuit

to be measured.

to as" the

meter")

complies with the safety

requirements

1.2.4 Keep your

fingers

behind the probe

barriers

when

for electronic

measuring

instruments

EC-61

0-1, taking

measurement with an

effective

voltage of

falls

into

pollution

degree

and meets the

over-voltage

above 60V DC or 30VAC.

standard of CAT

III

600V. 1.2.5 Do not take any voltage measurement if the value

Follow all safety and

operation instructions

to ensure safe between the measuring

terminal

and the ground

use of the meter. exceeds 1000V.

With proper use and care, the meter will give you years of 1.2.6 Select the highest range if the value to be

satisfactory

service. measured in the manual range is unknown.

1.1

Preliminary

1.2.7 Do not connect the meter to any

voltage

source

while the meter is in the current,

resistance,

diode

1.1.1 Tooperate the meter, the user must observe the or

continuity

test range.

following

normal safety rules: 1.2.8

Disconnect

the

test

probes from the

circuit

under

1) General

protection against electric

shock; and test before turning the range

selector

to change

2) Protection of the meter

against

misuse

functions.

1.1.2 When the meter is received, please check

whether

1.2.9 Be careful that high voltage pulses at the test point

it has been damaged during

transport.

may damage the meter when measurements are

1.1.3

After

being stored and

delivered

under harsh being taken on the switching power

circuit

conditions,

the meter should be checked and TV set.

confirmed

for

damage. 1.2.10 Do not measure the resistance, diode or

continuity

of live

circuits.

01 Oi!

MASTECH® MASTECH®

1.2.11 Do not use the meter near

explosive

gases,

steam or dirt.

1.2.12 Stop using the meter if any

abnormalities

faults

are

noticed.

1.2.13 Do not use the meter unless its rear case is

securely fastened

in its

original position.

1.2.14 Do not store or use the meter in areas exposed

direct sunlight,

high

temperatures

or high

humidity.

1.3 Symbols

Important safety information; refer

to the

operation

manual.

&:.

Dangerous

voltage

may be present.

IQI

Double

insulation (protection

class II)

CAT

111-

over-voltage (installation) category

III,

pollution

degree

per IEC61

0-1,

referring

tothe level

ofimpulse

withstand voltage protection provided.

(E:

Compliance

with European Union (EU)

directives

-=E-

Ground

-S-

Fuse

1.4

Precautions

1.4.1 Do not

adjust

repair

the meter by

attempting

remove the rear case. Such

operation

should only

be performed by

technician

who

fully understands

the meter and the

electric

shock risk

involved.

1.4.2 Remove the

test

probes from the

circuit

under

test

before opening the

battery cover of

the meter.

1.4.3 To

avoid

any

electric

shock caused by

erroneous

readings,

replace

the

batteries immediately

when

the"~"

symbol

appears

on the LCD.

1.4.4 To

avoid fire

hazards, the

replacement

fuse must

meet the

specified voltage

and

current ratings of

OA/500Vand F200mA/1

OOOV

(quick

acting).

1.4.5 Use wet cloth and mild

detergent

to clean the

meter; do not use

abrasives

solvents.

1.4.6 Turn to OFF

switch off

the power when is not in use.

1.4.7 Remove the

batteries

avoid

damages to the

meter if it will idle

for

long time.

1.4.8 Using this

appliance

in an

environment

with

strong

radiated radio-frequency electromagnetic

field (approximately

3V/m ),may

influence

its

measuring accuracy. The measuring resul can be

strongly deviating

from the actual value.

Description

The meter is

portable specialized

measuring

instrument

with

large

digital

LCD, as well as

backlight sourcefor

easy

reading.

The range

selector

designedfor single-hand operation

makes

measurement

easy.

Overload protection

and low

battery indication

are

provided.

is an ideal

multi-functional instrument

with

scores

practical

applications for professional, factory, school, amateur

and home use.

The meter can be used to measure DC andAC

voltages

and

currents,

and

resistances, test circuit continuity

and diodes,

detect

phone line mode,

judge

break points

in cable lines,

track

the

routing

of cable lines, and

detect

network

cable

integrity

and

non-contact voltage.

The meter is

provided

with both

automatic/manual

ranges.

The meter is

provided

with the

automatic shutdown

function.

MASTECH®

The meter is provided with the reading hold

function.

The meter is provided with the maximum measurement

The meter is provided with low battery

voltage indication.

2.1 Names of Parts

MASTECH®

For reading holding

For maximum measurement

For

switching

between auto and

manual ranges

For

switching

among measuring

functions

For switching

on/off

the

backlight

For measurement

Input

jack for

current

range

For mA/µA current, voltage,

resistance

and diode measurement

Common

terminal

)Non-contact voltage

detection

indicator

light

2)LCD (liquid crystal

display)

3)Data hold (HOLD)

4)Maximum measurement (MAX)

5)Range switch button (RANGE)

6)Function

switch button (FUNC)

7)Backlight

key

8)Test key

9)Panel

10) Rotary

selector

)mA/µAIV/O/jack

12) COM

jack

13)

10Ajack

14) Guard plate

2.2 Switches, Buttons and Input Jacks

HOLD key

MAX key

RANGE key

FUNC key

Backlight

key

TEST key

10Ajack

mA/µAIV/O/*

jack

COM

jack

MASTECH® MASTECH®

2.3

Display

V Volts (Voltage)

(alternating current)

A Amperes

(Current)

:":"':

(direct current)

Hz Hertz

(Frequency)

AUTO Auto range

µ,m,k,

Symbols of units: micro, milli, kilo and million

Ohms

(Resistance)

01')

Continuity

buzzer

+I-

Diode measurement

«'1'))

LAN PHONE

.&"

.... 01')

MAX

MAX Maximum measurement

ob _, ,~,

,-,

Reading being held

". :-:-:

kMQ

Low battery

f)~ - - -kHz

mµVA

Phone standby

~ ._.-.-

Phone ringing

laIDllalllDlmllllDllallDl ... .J

Phone pick-up

"' ____

III!IIll'.IJB_

IRED

RING

The RING line is clamped by the red clip

IRED·

TIPI

The TIP line is clamped by the red clip

LCD diagram

("1"

Audio signal

<D-@

Cable pair 1-2

@-@

Cable pair 3-6

@-@

Cable pair 4-5

Q)-@

Cable pair 7-8

SHIELD Cable shield

OPEN Open

circuit

SHORT Short

circuit

REVERSED Reverse connection

MISWIRE Miswiring

SPLIT PAIRS Split pair

07 08

MASTECH® MASTECH®

Specifications

3.1 General

3.1.1 Auto range and manual range options are

available.

3.1.2 Overload

protection

available for

all ranges.

3.1.3 Display: LCD.

3.1.4 Maximum value display: 1999 digits.

3.1.5

Polarity indication:

automatic;

'---' for

negative

polarity.

3.1.6 Over-range

indication:

'OL'or '---OL'.

3.1.7 Unit

indication: function

and energy unit

indication.

3.1.8 Judging the ringing, standby or pick-up mode of

the phone line.

3.1.9 Judging any

breakpoint

in the cable line, and

tracking

the routing of the cable line.

3.1.10 Detecting network cable integrity,

judging

open

circuit,

short

circuit,

miswiring,

split

pair and

reverse

connection

of the network cable, and

shield integrity, and

displaying abnormity

symbols.

3.1.11

Non-contact

voltage

detection.

3.1.12

Automatic

power off time: 15 min

3.1.13 Fuse

specification:

OA/500V,F200mA/1

OOOV

(quick

acting)

3.1.14 Battery

under-voltage indication:

The LCD

displays the"~"

symbol.

3.1.15 Operating power: 6F22 9V

batteries

3.1.160perating temperature: 0°C-40°C

3.1.17Storage

temperature:-1

0°C-50°C

3.1.18Dimensions:

195x92x55mm

3.1.19Weight:about 400g(including batteries)

3.2

Technical Index

3.2.1 DC Voltage

Range Resolution Accuracy

200mV 0.1mV

2V 1mV

(O.5%ofreading+5digits)

20V 0.01V

200V 0.1V

1000V 1V

(O.8%ofreading+5digits)

-Max. input voltage:

OOOV

Note:

At the low voltage range, unsteady readings will appear

before the test probes contact the

circuit.

This is normal

because the meter is highly

sensitive.

When the test

probes

contact

the

circuit,

the true reading will

displayed.

3.2.2 AC Voltage

Range Resolution Accuracy

200mV 0.1mV

2V 1mV

(O.8%ofreading+5digits)

20V 0.01V

200V 10.1V

750V 11V

Max. input voltage: 750V AC

-Frequencyrange:40-400Hz

Response: average (rms of sine wave)

MASTECH® MASTECH®

Note:

At the low

voltage

range, unsteady readings will appear

before the

test

probes

contact

the

circuit.

This is normal

because the meter is highly

sensitive.

When the test

probes

contact

the

circuit,

the true reading will

displayed.

3.2.3

Resistance

Range

Resolution Accuracy

2000 0.10

2KO 0.001 KO

20KO 0.01 KO ±(1.0%of reading+5digits)

200KO 0.1KO

2MO 0.001 MO

20MO 0.01MO

3.2.4

Diode Test

3.2.5

Short-Circuit Test

Ii!

3.2.6 DC

Current

Ran e

Resolution Accuracy

200µA 0.1µA

2000µA 1µA ±(1.2%of reading

5digits)

20mA 0.01mA

200mA 0.1mA

2A 0.001A

(2.0%of reading

digits)

20A 0.01A

Overload

protection:

µA, mA range: fuse 200mA/1

OOOV

(quick

acting)

range: fuse

OA/500V (quick

acting)

Max. input current: µA/mA

jack

(µA range): 2000uA

µA/mA

jack

(mA range): 200mA

jack:

10A

3.2.7 AC

Current

Range

Resolution Accuracy

200µA 0.1µA

2000µA 1µA ±(1.5%of reading

5digits)

20mA 0.01 mA

200mA 0.1mA

2A 0.001A

(3.0%of reading+5 digits)

20A 0.01A

Overload

protection:

µA, mA range: fuse 200mA/1

OOOV

(quick acting)

range: fuse

OA/500V (quick acting)

Max. input current: µA/mA

jack

(µA range): 2000uA

µA/mAjack

(mA range): 200mA

jack: 10A

-Frequencyrange:40-400Hz

Response: average (rms of sine wave)

MASTECH® MASTECH®

Operating Instructions

4.5

Backlight Source

4.1

Function Switching

1) If the

environment

is too dark

for

reading during

1) Press the "FUNC" key to switch between AC and DC measurement, hold on to

the"

key

for

more than

seconds to turn on the

backlight

source.

measurement at the

current

ranges. 2) Hold on to

the"

key again for more than

2) Press the "FUNC" key to switch between the diode

seconds to turn off the

backlight

source.

and

continuity

ranges. 3)

After

the

backlight

source is turned on, if

the"

4.2 Range

Switching

key is not held down for more than

seconds, the

1)When the meter is turned on, it is at the auto range

for backlight

source will shut down

automatically

measuring current, voltage and

resistance.

seconds later.

2) Press the "RANGE" key to

enter

the manual range

4.6 Use

of the Test

Key

mode. The range will go one level up with each press 1) Press "TEST" to

start detection

when the meter is at

and return to the lowest level when the highest level the Phone (phone line mode

detection),

Tone

is reached.

(judgment

and

tracking

of cable line), Net Cable

3) Hold the "RANGE" key

for

more than

seconds to (network cable

integrity detection)

range.

return to the auto range. 2)

After

the

detection,

the

detection result indicator

will

4.3

Maximum

Value

Measurement

flash. Press the "TEST" key to stop

flashing

and get

1)The maximum value measurement

function

can be ready

for

the next

detection.

used when the meter is measuring

current

and voltage.

4.7

Preparation for Measurement

2) To

display

the measured maximum value during 1)Turn the range

selector

and turn on the power. If the

measurement, press the "MAX" key, and the

measured maximum value will appear on the LCD. battery

voltage

is low (about ~7.2V), the LCD will

3) Press the "MAX" key again to release the maximum

display

the

"~"

symbol, when the

batteries

must

value measurement

function.

be replaced.

4.4

Reading Holding

2) The

"&."

symbol beside the input line

indicates

that

the input

voltage

current

should not exceed the

1)Tohold the reading during measurement, press the indicated value. This is intended to protect the

"HOLD" key, and the displayed value on the LCD internal

circuit

from damage.

will be locked. 3) Set the range

selector

to the desired measurement

2) Press the "HOLD" key again to release the reading

function

and range.

the manual range mode, if the

holding mode. scale of the measured value is unknown beforehand,

the

highest

range should be set.

13 14

MASTECH® MASTECH®

Connect

the common

test

wire and then the live

test

wire during

connection.

Remove the live

test

wire

first

during

disconnection.

4.8

Measurement of DC Voltage

WARNING

There is the risk

of electric

shock.

Pay

special attention

avoid

electric

shock when

measuring high

voltages.

Do not input any

voltage

of over DC1

OOOV,

which may

damage the

internal circuit thougha higher voltage

may be

displayed.

4.8.1 Plug the black probe into the COM jack and the red

probe into the Vjack.

4.8.2 Set the range selector to tne

V range position.

4.8.3 Press the "FUNC" key to switch to the DC

measurement mode, and press the

"RANGE"

key

to select the auto or manual mode.

4.8.4 Connect the test probes to the voltage source or

load

parallel for measurement.

4.8.5 Take

reading

the main display area of the LCD.

The polarity indication will show the polarity of the

terminal connected by the red probe.

Note:

1)At the low voltage range, unsteady readings will appear

before the test probes contact the circuit. This is normal

because the meter

highly sensitive. When the test

probes contact the circuit, the true reading will be

displayed.

the manual range mode, if the LCD displays

"-0

L" only,

means the measurement has exceeded

the range and

higher range should be selected.

the manual range mode, if the scale of the measured

value is unknown beforehand, the highest range should

be set and then lowered down gradually.

4.9

Measurement of AC Voltage

&.WARNING

There is the risk

of electric

shock.

Pay

special attention

avoid

electric

shock when

measuring high

voltages.

Do not input any

voltage

of over AC750V

rms,which

may damage the

internal circuit thougha higher

voltage

may be

displayed.

4.9.1 Plug the black probe into the COM jack and the red

probe into the Vjack.

4.9.2 Set the range selector to the

::;:;V

range position.

4.9.3 Press the "RANGE" key to select the auto or manual

mode.

4.9.4 Connect the test probes to the voltage source or load

in parallel for measurement.

4.9.5 Take

reading

the main display area of the LCD.

Note:

1) At the low voltage range, unsteady readings will appear

before the test probes contact the circuit. This

normal

because the meter

highly sensitive. When the test

probes contact the circuit, the true reading will be

displayed.

the manual range mode, if the LCD displays

only,

it means the measurement has exceeded the range and

higher range should be selected.

the manual range mode, if the scale of the measured

value is unknown beforehand, the highest range should

be set and then lowered down gradually.

-,~- 16

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