background image

- 1 -

Chapter

Chapter

Chapter

Chapter

1

1

1

1

Introduction

Introduction

Introduction

Introduction

Warning

Warning

Warning

Warning

Read

Read

Read

Read

Safety

Safety

Safety

Safety

Information

Information

Information

Information

before

before

before

before

using

using

using

using

the

the

the

the

meter.

meter.

meter.

meter.

S

S

S

S

ummarize

ummarize

ummarize

ummarize

The meter is a handled, battery-operated tool for measuring electrical parameters. It has all the features of a digital millimeter
and measure AC voltage, DC voltage, AC current, DC current, resistance, capacitance, frequency, duty cycle ratio, dBm, TC,
RTD,

Diode

Diode

Diode

Diode

Test,

Test,

Test,

Test,

and

Continuity

Continuity

Continuity

Continuity

Check

Check

Check

Check

.

Besides, it has features like:

Large LCD screen could display the three characteristic of one input signals.

Different reference impedance for dB measure function.

AUTO HOLD, DISPLAY HOLD and PEAK HOLD to display the measuring value.

Panel calibration function.

Three convenient data recording modes: LOG mode, MANUAL mode, and COMP mode.

USB-IR jack to connect with a PC

Open-case

Open-case

Open-case

Open-case

Inspection

Inspection

Inspection

Inspection

Open the case to check, if the meter is damaged or something is missing, contact the place of purchase immediately. Contact
the distributor for information about DMM accessories.
Accessories: A copy of user’s manual

A set of

CF-733370

industrial test lead

One USB to UART Bridge Controller (USB_DMM)

DMMVIEW_ A disk

Options:

K-TYPE TC

Safety

Safety

Safety

Safety

Information

Information

Information

Information

The meter complies with IEC61010.1-93 Over voltage

Pollution Degree 2. Use the meter only as specified in this manual.

Otherwise, the protection provided by the meter may be impaired.
A

Warning

Warning

Warning

Warning

identifies conditions and actions that pose hazards to the user.

A

Caution

Caution

Caution

Caution

identifies conditions and actions that may damage the meter or the equipment under test.

A

Notice

Notice

Notice

Notice

identifies symbols of the operation and explanations of the features. International symbols used on the meter and in

this manual are explained in Table 1-1.

Warning

Warning

Warning

Warning

To

To

To

To

avoid

avoid

avoid

avoid

possible

possible

possible

possible

electric

electric

electric

electric

shock

shock

shock

shock

or

or

or

or

personal

personal

personal

personal

injury,

injury,

injury,

injury,

follow

follow

follow

follow

these

these

these

these

guidelines

guidelines

guidelines

guidelines

...

.

Use

Use

Use

Use

the

the

the

the

meter

meter

meter

meter

as

as

as

as

the

the

the

the

instructions

instructions

instructions

instructions

of

of

of

of

the

the

the

the

producer;

producer;

producer;

producer;

otherwise

otherwise

otherwise

otherwise

,,,

,

the

the

the

the

protective

protective

protective

protective

function

function

function

function

shall

shall

shall

shall

be

be

be

be

invalid.

invalid.

invalid.

invalid.

Do

Do

Do

Do

not

not

not

not

use

use

use

use

the

the

the

the

meter

meter

meter

meter

if

if

if

if

it

it

it

it

is

is

is

is

damaged.

damaged.

damaged.

damaged.

Before

Before

Before

Before

you

you

you

you

use

use

use

use

the

the

the

the

meter,

meter,

meter,

meter,

inspect

inspect

inspect

inspect

the

the

the

the

case.

case.

case.

case.

Look

Look

Look

Look

for

for

for

for

cracks

cracks

cracks

cracks

or

or

or

or

missing

missing

missing

missing

plastic.

plastic.

plastic.

plastic.

Pay

Pay

Pay

Pay

particular

particular

particular

particular

attention

attention

attention

attention

to

to

to

to

the

the

the

the

insulation

insulation

insulation

insulation

surrounding

surrounding

surrounding

surrounding

the

the

the

the

connectors.

connectors.

connectors.

connectors.

Take

Take

Take

Take

the

the

the

the

leads

leads

leads

leads

off

off

off

off

the

the

the

the

meter

meter

meter

meter

before

before

before

before

unlock

unlock

unlock

unlock

the

the

the

the

battery

battery

battery

battery

door.

door.

door.

door.

Inspect

Inspect

Inspect

Inspect

the

the

the

the

test

test

test

test

leads

leads

leads

leads

for

for

for

for

damaged

damaged

damaged

damaged

insulation

insulation

insulation

insulation

or

or

or

or

exposed

exposed

exposed

exposed

metal.

metal.

metal.

metal.

Check

Check

Check

Check

the

the

the

the

test

test

test

test

leads

leads

leads

leads

for

for

for

for

continuity.

continuity.

continuity.

continuity.

Replace

Replace

Replace

Replace

damaged

damaged

damaged

damaged

test

test

test

test

leads

leads

leads

leads

before

before

before

before

you

you

you

you

use

use

use

use

the

the

the

the

meter.

meter.

meter.

meter.

Do

Do

Do

Do

not

not

not

not

use

use

use

use

the

the

the

the

meter

meter

meter

meter

if

if

if

if

it

it

it

it

operates

operates

operates

operates

abnormally.

abnormally.

abnormally.

abnormally.

Protection

Protection

Protection

Protection

may

may

may

may

be

be

be

be

impaired.

impaired.

impaired.

impaired.

When

When

When

When

in

in

in

in

doubt,

doubt,

doubt,

doubt,

have

have

have

have

the

the

the

the

meter

meter

meter

meter

serviced.

serviced.

serviced.

serviced.

Do

Do

Do

Do

not

not

not

not

operate

operate

operate

operate

the

the

the

the

meter

meter

meter

meter

around

around

around

around

explosive

explosive

explosive

explosive

gas,

gas,

gas,

gas,

vapor,

vapor,

vapor,

vapor,

or

or

or

or

dust.

dust.

dust.

dust.

Do

Do

Do

Do

not

not

not

not

apply

apply

apply

apply

more

more

more

more

than

than

than

than

the

the

the

the

rated

rated

rated

rated

voltage,

voltage,

voltage,

voltage,

as

as

as

as

marked

marked

marked

marked

on

on

on

on

the

the

the

the

meter,

meter,

meter,

meter,

between

between

between

between

terminals

terminals

terminals

terminals

or

or

or

or

between

between

between

between

any

any

any

any

terminal

terminal

terminal

terminal

and

and

and

and

earth

earth

earth

earth

ground.

ground.

ground.

ground.

Make

Make

Make

Make

sure

sure

sure

sure

the

the

the

the

meter

meter

meter

meter

works

works

works

works

normally

normally

normally

normally

as

as

as

as

per

per

per

per

testing

testing

testing

testing

a

a

a

a

known

known

known

known

voltage.

voltage.

voltage.

voltage.

Do

Do

Do

Do

not

not

not

not

use

use

use

use

the

the

the

the

meter

meter

meter

meter

if

if

if

if

it

it

it

it

operates

operates

operates

operates

abnormally.

abnormally.

abnormally.

abnormally.

When

When

When

When

in

in

in

in

doubt,

doubt,

doubt,

doubt,

have

have

have

have

the

the

the

the

meter

meter

meter

meter

serviced.

serviced.

serviced.

serviced.

To

To

To

To

avoid

avoid

avoid

avoid

possible

possible

possible

possible

electric

electric

electric

electric

shock

shock

shock

shock

caused

caused

caused

caused

by

by

by

by

false

false

false

false

reading

reading

reading

reading

due

due

due

due

to

to

to

to

exist

exist

exist

exist

ting

ting

ting

ting

alternating

alternating

alternating

alternating

voltage

voltage

voltage

voltage

in

in

in

in

all

all

all

all

the

the

the

the

direct

direct

direct

direct

current

current

current

current

functions,

functions,

functions,

functions,

including

including

including

including

manual

manual

manual

manual

and

and

and

and

auto

auto

auto

auto

rang

rang

rang

rang

ing

ing

ing

ing

,,,

,

make

make

make

make

sure

sure

sure

sure

whether

whether

whether

whether

there

there

there

there

is

is

is

is

any

any

any

any

alternating

alternating

alternating

alternating

voltage

voltage

voltage

voltage

existing

existing

existing

existing

or

or

or

or

not

not

not

not

before

before

before

before

selecting

selecting

selecting

selecting

a

a

a

a

direct

direct

direct

direct

voltage

voltage

voltage

voltage

range

range

range

range

equals

equals

equals

equals

to

to

to

to

or

or

or

or

higher

higher

higher

higher

than

than

than

than

the

the

the

the

alternating

alternating

alternating

alternating

voltage.

voltage.

voltage.

voltage.

T

T

T

T

o

o

o

o

avoid

avoid

avoid

avoid

false

false

false

false

readings,

readings,

readings,

readings,

which

which

which

which

could

could

could

could

lead

lead

lead

lead

to

to

to

to

possible

possible

possible

possible

electric

electric

electric

electric

shock

shock

shock

shock

or

or

or

or

personal

personal

personal

personal

injury,

injury,

injury,

injury,

replace

replace

replace

replace

the

the

the

the

batteries

batteries

batteries

batteries

as

as

as

as

soon

soon

soon

soon

as

as

as

as

the

the

the

the

low

low

low

low

battery

battery

battery

battery

indicator

indicator

indicator

indicator

appears.

appears.

appears.

appears.

Do

Do

Do

Do

not

not

not

not

touch

touch

touch

touch

the

the

the

the

exposed

exposed

exposed

exposed

wine,

wine,

wine,

wine,

connector

connector

connector

connector

or

or

or

or

unused

unused

unused

unused

input

input

input

input

jack

jack

jack

jack

or

or

or

or

circuit

circuit

circuit

circuit

under

under

under

under

test

test

test

test

when

when

when

when

the

the

the

the

meter

meter

meter

meter

is

is

is

is

working.

working.

working.

working.

Use

Use

Use

Use

only

only

only

only

type

type

type

type

AA

AA

AA

AA

A

A

A

A

batteries,

batteries,

batteries,

batteries,

properly

properly

properly

properly

installed

installed

installed

installed

in

in

in

in

the

the

the

the

meter

meter

meter

meter

case

case

case

case

to

to

to

to

power

power

power

power

the

the

the

the

meter.

meter.

meter.

meter.

Use

Use

Use

Use

caution

caution

caution

caution

when

when

when

when

working

working

working

working

above

above

above

above

30

30

30

30

V

V

V

V

ac

ac

ac

ac

rms,

rms,

rms,

rms,

42

42

42

42

V

V

V

V

peak,

peak,

peak,

peak,

or

or

or

or

60

60

60

60

V

V

V

V

dc.

dc.

dc.

dc.

Such

Such

Such

Such

voltages

voltages

voltages

voltages

pose

pose

pose

pose

a

a

a

a

shock

shock

shock

shock

hazard.

hazard.

hazard.

hazard.

Avoid

Avoid

Avoid

Avoid

working

working

working

working

alone.

alone.

alone.

alone.

When

When

When

When

using

using

using

using

the

the

the

the

probes,

probes,

probes,

probes,

keep

keep

keep

keep

your

your

your

your

fingers

fingers

fingers

fingers

behind

behind

behind

behind

the

the

the

the

finger

finger

finger

finger

guards

guards

guards

guards

on

on

on

on

the

the

the

the

probes.

probes.

probes.

probes.

Connect

Connect

Connect

Connect

the

the

the

the

common

common

common

common

test

test

test

test

lead

lead

lead

lead

before

before

before

before

you

you

you

you

connect

connect

connect

connect

the

the

the

the

live

live

live

live

test

test

test

test

lead.

lead.

lead.

lead.

When

When

When

When

you

you

you

you

disconnect

disconnect

disconnect

disconnect

test

test

test

test

leads,

leads,

leads,

leads,

disconnect

disconnect

disconnect

disconnect

the

the

the

the

live

live

live

live

test

test

test

test

lead

lead

lead

lead

first.

first.

first.

first.

To

To

To

To

avoid

avoid

avoid

avoid

possible

possible

possible

possible

fire

fire

fire

fire

or

or

or

or

electric

electric

electric

electric

shock,

shock,

shock,

shock,

do

do

do

do

not

not

not

not

connect

connect

connect

connect

TC

TC

TC

TC

with

with

with

with

the

the

the

the

live

live

live

live

circuit.

circuit.

circuit.

circuit.

Caution

Caution

Caution

Caution

To

To

To

To

avoid

avoid

avoid

avoid

possible

possible

possible

possible

damage

damage

damage

damage

to

to

to

to

the

the

the

the

meter

meter

meter

meter

or

or

or

or

to

to

to

to

the

the

the

the

equipment

equipment

equipment

equipment

under

under

under

under

test:

test:

test:

test:

Set

Set

Set

Set

the

the

the

the

rotary

rotary

rotary

rotary

switch

switch

switch

switch

on

on

on

on

the

the

the

the

right

right

right

right

range.

range.

range.

range.

Do

Do

Do

Do

cut

cut

cut

cut

off

off

off

off

the

the

the

the

testing

testing

testing

testing

leads

leads

leads

leads

and

and

and

and

circuit

circuit

circuit

circuit

before

before

before

before

switching

switching

switching

switching

...

.

Forbid

Forbid

Forbid

Forbid

to

to

to

to

switch

switch

switch

switch

during

during

during

during

the

the

the

the

measuring

measuring

measuring

measuring

process.

process.

process.

process.

Summary of Contents for 98A

Page 1: ...d on on on the the the meter meter meter between between between terminals terminals terminals or or or between between between any any any terminal terminal terminal and and and earth earth earth gro...

Page 2: ...seconds seconds and and and then then then restart restart restart the the the meter meter meter Automatic Automatic Automatic Power Power Power Off Off Off The meter will go into automatic power off...

Page 3: ...how the pushbutton function Figure Figure Figure 2 1 O 2 1 O 2 1 Outer uter uter Structure Structure Structure Figure Figure Figure 2 2 Input 2 2 Input 2 2 Input Jacks Jacks Jacks Table Table Table 2...

Page 4: ...button Function Function Function AC Voltage Measurement dBm Measurement DC Voltage Measurement None DC mA Voltage Measurement TC Measurement Resistance Measurement Diode testing continuity testing RT...

Page 5: ...ent primary display shows MIN MAX AVG value in cycle while secondary display shows present reading Low battery indicator The indicator in the display notifies you that the batteries are low and should...

Page 6: ...elow 1 mW dBm AC AC AC DC DC DC Alternating current direct current Display the duty cycle ratio of signals when measuring frequency Bar Graph The polarity indicator both ends of the bar graph show the...

Page 7: ...7...

Page 8: ...and enter manual ranging In manual select next input range In Comparative mode press to set MAX and MIN value Press to enter Setup mode when turning the meter on and press to select the set value in t...

Page 9: ...A H A H Note Note Note Peak Peak Peak HOLD HOLD HOLD mode mode mode is is is only only only available available available in in in DCV DCV DCV In Peak HOLD mode the meter detects refresh and displays...

Page 10: ...e Mode Mode Note The function is invalid in REL TC RTD dBm DC mV Diodes Continuity Capacitance Frequency Duty cycle ratio features The MIN MAX mode stores minimum MIN and maximum MAX input values MIN...

Page 11: ...ge Voltage is the difference in electrical potential between two points The polarity of ac alternating current voltage varies over time while the polarity of direct current voltage is constant over ti...

Page 12: ...easurements with the following procedure 1 Make an ac volt measurement to be used as a reference point 2 Press to select dB The dBm value appears in the primary display and the ac volts reading appear...

Page 13: ...ps beeps beeps constantly constantly constantly if if if the the the input input input voltage voltage voltage is is is more more more than than than AC AC AC 750V 750V 750V rms rms rms which which wh...

Page 14: ...ead lead can can can add add add 0 1 0 1 0 1 to to to 0 2 0 2 0 2 of of of error error error to to to resistance resistance resistance measurements measurements measurements To To To test test test th...

Page 15: ...st test test disconnect disconnect disconnect circuit circuit circuit power power power and and and discharge discharge discharge all all all high voltage high voltage high voltage capacitors capacito...

Page 16: ...the the the red red red lead lead lead with with with the the the positive positive positive point point point and and and the the the black black black lead lead lead with with with the the the nega...

Page 17: ...nce to select alternating current measurement and the screen shows AC 4 Open the circuit path to be tested Touch the red probe to the more positive side of the break touch the black probe to the more...

Page 18: ...atio and then back to voltage current Frequency Duty cycle ratio Voltage Current Voltage Current Frequency Frequency Duty cycle ratio Figure3 13 Frequency Figure3 13 Frequency Figure3 13 Frequency and...

Page 19: ...ng time and interval time of the real time data see Changing the Default Settings 2 Press LOG LOG LOG appears on the screen and the recorded number appears in the secondary display the elapsed time di...

Page 20: ...MEM MEM MEM position position position Notice Notice Notice In In In MEM MEM MEM function function function each each each operation operation operation could could could only only only read read read...

Page 21: ...any dirt that may be in the terminals 3 Soak a new swab with alcohol Work the swab around in each terminal Testing Testing Testing the the the Fuses Fuses Fuses Warning Warning Warning To To To avoid...

Page 22: ...er needs four AAA alkaline batteries Warning Warning Warning To To To avoid avoid avoid electrical electrical electrical shock shock shock Remove Remove Remove test test test leads leads leads from fr...

Page 23: ...Pollution Degree 2 Safety Standard issued by IEC Fuse Fuse Fuse Protection Protection Protection for for for mA mA mA or or or A A A inputs inputs inputs Fuse Fuse Fuse Protection Protection Protectio...

Page 24: ...esolution Resolution Accuracy Accuracy Accuracy 40 400Hz Remark Remark Remark 400 0 mV 0 1 mV 1 0 4 Specifications are valid from 5 to 100 of amplitude range 400mV is only confined to manual range AC...

Page 25: ...5 4 4 000A 0 001A 1 4 Measuring Impedance 0 01 Overvoltage 10A 250V fast blow fuse 10 00A 0 01A 1 4 Range Range Range Frequency Frequency Frequency Accuracy Remark 400 0 0 1 0 2 4 Open circuit voltag...

Page 26: ...rounds to apply this product to a particular purpose K 200 to 950 1 0 5 2 100 0 5 1 100 By using ITS 90 temperature scale Note The accuracy does not include the error of internal temperature compensat...

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