B+K precision 308A Manuale utente

Instruction Manual

Model 308ADigital Insulation &Continuity Meter

INSTRUMENT LAYOUTINDEX PAGE

............................... 1

INTRODUCTION........................................ 2

SAFETY NOTES......................................... 3

FEATURES................................................ 4

MEASURING METHODS............................. 5-7

SPECIFICATIONS...................................... 8-9

MAINTENANCE.......................................... 10

INSTRUMENT LAYOUT

LIMITED ONE-YEAR WARRANTY................ 11

SERVICE INFORMATION............................ 12

-1-

INSTRUMENT LAYOUTINDEX PAGE

............................... 1

INTRODUCTION........................................ 2

SAFETY NOTES......................................... 3

FEATURES................................................ 4

MEASURING METHODS............................. 5-7

SPECIFICATIONS...................................... 8-9

MAINTENANCE.......................................... 10

INSTRUMENT LAYOUT

LIMITED ONE-YEAR WARRANTY................ 11

SERVICE INFORMATION............................ 12

-1-

SAFETY NOTES

—Read the following safety information carefully

before attempting to operate or service the

meter .

—Use the meter only as specified in this manual ;

otherwise the protection provided by the meter

may be impaired .

—Rated environmental conditions :

(1). Indoor use .

(2). Installation Category .

(3). Pollution Degree 2 .

(4). Altitude up to 2000 Meter .

(5). Relative Humidity 80% Max.

(6). AmbientTemperature0~40°C

—Observe the international electrical symbols

listed below .

Meter is protected throughout by double

insulation or reinforced insulation .

Warning ! Risk of electric shock .

Caution ! Refer to this manual before

using the meter .

Alternating current .

INTRODUCTION

NOTE

This meter has been designed and tested according

to IEC publication 348 , safety

requirements for electronic measuring apparatus ,

IEC-1010 (EN 61010) and other safety standards .

Follow all warnings to ensure safe operation .

WARNING

READ "SAFETY NOTES" ( NEXT PAGE )

BEFORE USING THE METER .

-2- -3-

SAFETY NOTES

—Read the following safety information carefully

before attempting to operate or service the

meter .

—Use the meter only as specified in this manual ;

otherwise the protection provided by the meter

may be impaired .

—Rated environmental conditions :

(1). Indoor use .

(2). Installation Category .

(3). Pollution Degree 2 .

(4). Altitude up to 2000 Meter .

(5). Relative Humidity 80% Max.

(6). AmbientTemperature0~40°C

—Observe the international electrical symbols

listed below .

Meter is protected throughout by double

insulation or reinforced insulation .

Warning ! Risk of electric shock .

Caution ! Refer to this manual before

using the meter .

Alternating current .

INTRODUCTION

NOTE

This meter has been designed and tested according

to IEC publication 348 , safety

requirements for electronic measuring apparatus ,

IEC-1010 (EN 61010) and other safety standards .

Follow all warnings to ensure safe operation .

WARNING

READ "SAFETY NOTES" ( NEXT PAGE )

BEFORE USING THE METER .

-2- -3-

MEASURING METHODS

Operation caution

Observe all safety precautions when the FUNCTION

switch is set to either the 200M (250,500V) or the

2000M (1000V) position . Connect the meter test

leads to the circuit under test before operating the

TEST switch . Do not touch the clip ends of the test

leads when the TEST switch is pressed .

Some electrical equipment , especially cables , may

retain an electrical charge when disconnected from

the line . It is good practice to discharge such

equipment with grounding straps , or other suitable

devices , before touching or making connections .

The meter automatically discharge the test circuits

when the spring loaded TEST switch is released .

Important

Remove all power to the circuit under test when

making resistance measurements . If any voltage is

present in the test circuit the red on the meter scale

plate will light .

Immediately disconnect test leads and turn off

power to test circuit .

—Function switch :

The FUNCTION switch is used to select the range ,

or function desired .

—Test switch :

The TEST switch is normally OFF , spring loaded ,

momentary action switch which "turn on" the meter.

the momentary action is a safety feature .

The test voltage generated by the meter is

automatically discharged when the TEST switch is

released .

FEATURES

—3 1/2 Digit Insulation Tester .

—68mm(2.677")x34mm(1.33") large LCD display .

—Three Insulation test voltage 250V,500V,1000V .

—External voltage warning indication

—Automatic circuit discharge .

—Test Insulation at rated voltage into a 1 mA load .

—200 mAcontinuity short circuit test current .

—AC voltage measurement .

—Fuse protection .

—Meet IEC 1010 CAT. , BS 16 edition .

-4- -5-

MEASURING METHODS

Operation caution

Observe all safety precautions when the FUNCTION

switch is set to either the 200M (250,500V) or the

2000M (1000V) position . Connect the meter test

leads to the circuit under test before operating the

TEST switch . Do not touch the clip ends of the test

leads when the TEST switch is pressed .

Some electrical equipment , especially cables , may

retain an electrical charge when disconnected from

the line . It is good practice to discharge such

equipment with grounding straps , or other suitable

devices , before touching or making connections .

The meter automatically discharge the test circuits

when the spring loaded TEST switch is released .

Important

Remove all power to the circuit under test when

making resistance measurements . If any voltage is

present in the test circuit the red on the meter scale

plate will light .

Immediately disconnect test leads and turn off

power to test circuit .

—Function switch :

The FUNCTION switch is used to select the range ,

or function desired .

—Test switch :

The TEST switch is normally OFF , spring loaded ,

momentary action switch which "turn on" the meter.

the momentary action is a safety feature .

The test voltage generated by the meter is

automatically discharged when the TEST switch is

released .

FEATURES

—3 1/2 Digit Insulation Tester .

—68mm(2.677")x34mm(1.33") large LCD display .

—Three Insulation test voltage 250V,500V,1000V .

—External voltage warning indication

—Automatic circuit discharge .

—Test Insulation at rated voltage into a 1 mA load .

—200 mAcontinuity short circuit test current .

—AC voltage measurement .

—Fuse protection .

—Meet IEC 1010 CAT. , BS 16 edition .

-4- -5-

Caution: Never turn thefunction dial whilst the

button is depressed.This may damage

the instrument. Nevertouch the circuit

under test duringinsulation testing.

When testing is complete ensure that the test

buttonis released before the test leads are

disconnected .

This is because the system may be charged up

and it must be allowed to discharge through the

tester's Internal discharge resistor .

—Continuity testing (Resistance tests) :

Warning: Ensure circuit are not livebefore

commencing testing .

Select the 20 range by rotating the range

selector and connect the test leads to the

instrument .

Short the tips of the leads . Press and hold

down the test button by twisting it a quarter

turn clockwise .

The display will show the resistance of the test

leads . Adjust the ZERO control to set the

reading of zero .

Connect the test leads to the circuit under test .

Ensure the circuit is not live by checking that

the live circuit indicator does not lit .

Read the value of resistance from the LCD .

—AC voltage test :

Set FUNCTION switch to ACV . Connect test

leads to circuit being measured , Press TEST

button and read the value of voltage form the LCD.

—Always check the following before testing :

The "Battery Low" indicator is not showing.

There is no visual damage to the instrument or

test leads.

—Test Lead Continuity:

Select the CONTINUITY function and 20W range.

Short the test leads together.

An over-range ( "1" ) indication will mean that the

leads are faulty or instrument fuse is blown. (See

"Fuse Replacement" section)

—Insulation Resistance Testing:

Warning: Insulation tests should be conductedon

circuits that arede-energised . Ensure

circuits are notlive before commencing

testing.

Select the required test voltage (250V , 500V

or 1000V) by rotating the function switch .

Attach the test leads to the instrument and to

the circuit to be tested (see connect diagram) .

If the "LIVE CIRCUIT" is lit , do not press the

test button and disconnect the instrument from

the circuit . The circuit is live and should be de

-energised before further testing .

Press the test button .

The value of insulation

resistance in megohms

will be displayed .

Connect Diagram

-6- -7-

Caution: Never turn thefunction dial whilst the

button is depressed.This may damage

the instrument. Nevertouch the circuit

under test duringinsulation testing.

When testing is complete ensure that the test

buttonis released before the test leads are

disconnected .

This is because the system may be charged up

and it must be allowed to discharge through the

tester's Internal discharge resistor .

—Continuity testing (Resistance tests) :

Warning: Ensure circuit are not livebefore

commencing testing .

Select the 20 range by rotating the range

selector and connect the test leads to the

instrument .

Short the tips of the leads . Press and hold

down the test button by twisting it a quarter

turn clockwise .

The display will show the resistance of the test

leads . Adjust the ZERO control to set the

reading of zero .

Connect the test leads to the circuit under test .

Ensure the circuit is not live by checking that

the live circuit indicator does not lit .

Read the value of resistance from the LCD .

—AC voltage test :

Set FUNCTION switch to ACV . Connect test

leads to circuit being measured , Press TEST

button and read the value of voltage form the LCD.

—Always check the following before testing :

The "Battery Low" indicator is not showing.

There is no visual damage to the instrument or

test leads.

—Test Lead Continuity:

Select the CONTINUITY function and 20W range.

Short the test leads together.

An over-range ( "1" ) indication will mean that the

leads are faulty or instrument fuse is blown. (See

"Fuse Replacement" section)

—Insulation Resistance Testing:

Warning: Insulation tests should be conductedon

circuits that arede-energised . Ensure

circuits are notlive before commencing

testing.

Select the required test voltage (250V , 500V

or 1000V) by rotating the function switch .

Attach the test leads to the instrument and to

the circuit to be tested (see connect diagram) .

If the "LIVE CIRCUIT" is lit , do not press the

test button and disconnect the instrument from

the circuit . The circuit is live and should be de

-energised before further testing .

Press the test button .

The value of insulation

resistance in megohms

will be displayed .

Connect Diagram

-6- -7-

SPECIFICATIONS

test leads.

—Test Lead Continuity:

—Insulation resistance

Measuring range :

0-200M (250V,500V DC ±10%)

Resolution : 1 count / 100K

0-2000M (1000V DC ±10%)

Resolution : 1 count / 1M

Accuracy : ±1.5% rdg. ±5dgt. (200M range

±3%rdg. ±3dgt. (under 1G / 2000M

±5%rdg. ±5dgt. (under 2G 2000M

Output current :

1 mADC min. at 0.25 M (250V range)

1 mADC min. at 0.5 M (500V range)

1 mADC min. at 1 M (1000V range)

Power consumption : Max. consumption current

approx. 250mA.

—AC voltage

Range : 0-600V.

Resolution : 1V.

Accuracy : ±1.5%rdg. ±3dgt.

Line frequency range : 40 -120 Hz .

—Continuity

Ohm range : 0-20

Resolution : 0.01

Accuracy : ±1.5%rdg. ±5dgt.

Ohm range : 0-2000

Resolution : 1

Accuracy : ±1.5%rdg. ±3dgt.

Open circuit terminal voltage : 4 V DC min.

Short circuit terminal current : 210 mA DC min.

Power consumption: Max. consumption current

approximately 160mA

Buzzer sound below : under 10 (on 20 range)

—Withstand :Meet IEC-1010 safety requirements

Category .

—Dimension :170 165 92 mm 6.7 6.5 3.6 inch

with housing front cover

—Weight : 1.04 kg ( battery included )

—Standard Accessories:

Batteries 1.5V , size AA(R6) 8 pieces

Test Leads 1 pair

Fuse 0.5A, 250V 1 piece

Instruction Manual 1 vol.

-8- -9-

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