A.W. Sperry Instruments 3005 Manuale utente

8/05 Form #270

OPERATING

INSTRUCTION

MODEL 3005

DIGITAL INSULATION-CONTINUITY TESTER

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

1. SAFTY PRECAUTIONS

○The instrument is designed to produce in accordance with the following

standards and supplied in the best conditions after successfully clearing

the inspection.

・IEC 61010-1 Overvoltage CAT III 300V Pollution Degree 2

・IEC 61010-2-31

This instruction manual describes warnings and safety rules which must be

observed by the user to ensure safety operation of the instrument and to

retain it in safe condition. Therefore, read through these instructions before

using the instrument.

WARNING

●Read through and understand instructions contained in this manual

before using the instrument.

●Save and keep the manual handy to enable quick reference whenever

necessary.

●The instrument must only be used by a competent trained person and

operated in strict accordance with the instructions. A.W.SPERRY will

not accept any liability for any damage or injury caused by misuse or

non-compliance with the instructions or safety procedures.

●It is essential to understand the safety rules contained in the manual.

They must be observed on using the instrument.

Be sure to observe the above rules strictly. Not following the

instructions may cause injury or instrument damage.

○The symbol on the instrument means that the user must refer to the

relevant section of this manual for safe operation of the instrument. There

are three kinds of the symbol . Read the following instructions of each

symbol carefully.

―1―

CONTENTS

1. SAFETY PRECAUTIONS ······································································· 1

2. FEATURES ···························································································· 4

3. SPECIFICATIONS ················································································· 5

4. INSTRUMENT LAYOUT ········································································· 9

4-1 Instrument layout ············································································· 9

4-2 LCD ································································································ 10

4-3 Connector ······················································································· 11

5. PREPARATION FOR MEASUREMENT ··············································· 12

5-1 Removing the Cover ······································································· 12

5-2 Battery Voltage Check ····································································· 12

5-3 Test Probe Connection ··································································· 12

6. MEASUREMENT ··················································································· 13

6-1 Disconnection and Check of Power Source of

the Circuit under Test ····································································· 13

6-2 Insulation Resistance Measurement ··············································· 14

6-3 Continuity Measurement (Resistance Tests) ·································· 16

6-4 Continuous Measurement ······························································· 17

7. FUNCTIONS ·························································································· 18

7-1 AUTO NULL ···················································································· 18

7-2 Auto Power Off ················································································ 18

8. BATTERY & FUSE REPLACEMENT ···················································· 19

8-1 Battery Replacement ······································································ 19

8-2 Fuse Replacement ·········································································· 19

9. CASE AND STRAP BELT ASSEMBLY·················································· 20

10. CLEANING OF THE INSTRUMENT ····················································· 21

11. SERVICING···························································································· 21

CAUTION

●Always make sure to set the function switch or range selector switch to

the appropriate position before taking measurements.

●Do not expose the instrument to the direct sun, dew fall or extreme

temperature and/or humidity.

●When the instrument will not be in use for a long period of time, place it

in storage after removing batteries.

●Use a damp cloth soaked in water or neutral detergent for cleaning the

instrument. Do not use abrasives or solvents.

―3―

DANGER is reserved for conditions and actions that are likely to cause

serious or fatal injury.

WARNING is reserved for conditions and actions that can cause

serious or fatal injury.

CAUTION is reserved for conditions and actions that can cause minor

injury or instrument damage.

DANGER

●Do not use this instrument on energized (LIVE) circuits.

●Do not take measurement in the presence of flammable gasses.

Otherwise, the use of the instrument may cause sparkling, which leads

to an explosion.

●Always keep your fingers behind the barrier on test probe during

measurement.

●Never use the instrument if its surface or your hand is wet.

●Never open the battery compartment cover while taking measurement.

WARNING

●Do not attempt to take any measurements, if any abnormal conditions

occur, such as broken test probe and cracked enclosure of the

instrument.

●Never change function switches with test probe connected to the

equipment under test.

●Do not install substitute parts, perform any unauthorized modification, or

disassemble the instrument. Return the instrument to A.W.SPERRY or

your distributor for service and repair so as to ensure the safety

features are maintained.

●Do not replace batteries when the surface of the instrument is wet.

●Make sure to disconnect the test probe from the instrument before

opening the battery compartment cover for battery replacement.

―2―

3. SPECIFICATIONS

●Measuring Range and Accuracy (at 23±5°C, relative humidity 45 -75%)

○Insulation Resistance Ranges:

Nominal Output Voltage 250V 500V 1000V

Measuring 0 ~19.99MΩ0 ~19.99MΩ0 ~19.99MΩ

Ranges 0 ~ 199.9MΩ0 ~ 199.9MΩ0 ~ 199.9MΩ

0 ~ 1999MΩ0 ~ 1999MΩ0 ~ 1999MΩ

Open-Circuit 250V DC 500V DC 1000V DC

Voltage +20%,-0% +20%,-0% +20%,-0%

Nominal Current 1mA DC min. 1mA DC min. 1mA DC min.

at 0.25MΩat 0.5MΩat 1MΩ

Short-Circuit

Current 1.5mA approx

20MΩ±1.5%rdg ±5dgt

200MΩ

Accuracy

2000 0~1GΩ

±3%rdg ±3dgt

MΩ

1G~2GΩ

±10%rdg ±3dgt

○Continuity Ranges:

Ranges 20Ω200Ω2000Ω

Measuring Ranges 0 ~ 19.99Ω0 ~ 199.9Ω0 ~ 1999Ω

Open-Circuit

Voltage 7 ~ 12V approx

Measuring Current

at 0.2Ω~ 2Ω200mA min

Accuracy

±1.5%rdg ±5dgt

±1.5%rdg ±3dgt

○AC Voltage Indication

0 ~ 600V ±5%rdg ±3dgt

―5―

2. FEATURES

MODEL-3005 are microprocessor controlled insulation-continuity testers.

●Designed to safety standards:

IEC 61010-1 Overvoltage CAT III 300V Contamination Degree 2

IEC 61010-2-31 (Safety requirements for hand-held probe assemblies)

●Bar graph to indicate measured results

●Strap belt to make both hands' operation easier

●Live circuit warning indication and buzzer

●Auto discharge function

When insulation resistance is measured, electric charges stored in

capacitive circuits are automatically discharged after testing. Discharge

can be checked with live voltage graph.

●Auto power off function

To prevent the instrument from being left powered on and conserve

battery power, the instrument automatically turns off approx. 10 minutes

after the last switch operation.

―4―

IEC 60529 (IP54) Dust & drip proof

●Operating System: Dual integration

●Display: Liquid crystal display (maximum count: 1999),

Unit, Mark

Bar graph 30 points max. (20 points on Ω

range)

●Over range Indication: "OL" is shown on the display.

●Sample Rate: Approx. 0.5 ~ 2.5 times per second

●Operating Temperature 0 ~ +40°C, relative humidity up to 85%

& Humidity:

●Storage Temperature -20 ~ +60°C, relative humidity up to 75%

& Humidity:

●Insulation Resistance:

More than 50MΩat 1000V DC between electrical

circuit and housing case

●Withstand Voltage: 3700V AC for one minute between electrical

circuit and housing case

●Overload Protection

Insulation resistance ranges:

1000V Range 1200V (DC+AC p-p) for 10 seconds

500V Range 600V (DC+AC p-p) for 10 seconds

250V Range 300V (DC+AC p-p) for 10 seconds

Continuity ranges:

20/200/2000Ω280V (DC+AC p-p) for 10 seconds

Range (Protection by fusing)

―7―

●Typical Number of Measurements.

(central tendency for supply voltage up to 8V)

Insulation Resistance Ranges:

Approx. 1000 times min. at load 0.5MΩ

Continuity Ranges:

Approx. 700 times min. at load 1Ω

●Operating Errors (IEC 61557-2,-4)

Functions Range Measuring range to keep Maximum percentage

operating error operating error

20MΩ0.50 ~ 19.99MΩ

1000V 200MΩ1.0 ~ 199.9MΩ

2000MΩ10 ~ 1000MΩ

20MΩ0.50 ~ 19.99MΩ

500V 200MΩ1.0 ~ 199.9MΩ

2000MΩ10 ~ 100MΩ

20MΩ0.50 ~ 19.99MΩ±30%

250V 200MΩ1.0 ~ 199.9MΩ

2000MΩ10 ~ 100MΩ

20Ω0.20 ~ 19.99Ω

Ω200Ω1.0 ~ 199.9Ω

2000Ω10 ~ 1999Ω

The influencing variations used for calculating the operating error are

denoted as follows;

Temperature: 0℃and 35℃

Supply voltage : 8V to 13.8V

●Applicable Standards

IEC 61010-1 Over voltage CAT III 300V Pollution Degree 2

IEC 61010-2-31 Safety requirements for hand-held probe

assemblies

IEC 61557-1/2/4 Measuring equipment for low voltage

distribution systems

IEC 61326-1 EMC

―6―

4. INSTRUMENT LAYOUT

4-1 INSTRUMENT LAYOUT

①… LCD DISPLAY

②… RANGE SELECTOR SWITCH

③… TEST BUTTON

④… CONNECTOR

⑤… FUNCTION SWITCH

⑥… TEST PROBE (RED)

⑦… TEST PROBE (BLACK)

⑧… ALLIGATOR CLIP (BLACK)

⑨… PLOBE CAP (BLACK & RED)

―9―

●Dimensions: 185(L) x 167(W) x 89(D) mm approx.

●Weight: 900g approx. (including batteries)

●Power Source: 8 x R6P, 1.5V AA or equivalent

●

Auto-power-off Function:

Automatically turns off approx. 10 minutes after

the last switch operation.

Consumption current: approx. 75µA

●Accessories

Test Probe MODEL7122 x 1 set

Strap belt x 1

Test probe pouch x 1

Batteries (R6P) x 8

Instruction manual x 1

Spare fuse F600V/500mA x 1

―8―

①

②

③

④

⑤

⑥ ⑦

⑧

⑨

9…OUTPUT VOLTAGE GRAPH (INSULATION RESISTANCE)

FUNCTION SETTING

PER RATED OUTPUT VOLTAGE

1 ~ 24%

25 ~ 49%

50 ~ 74%

75 ~ 99%

100% or over

10…OUTPUT VOLTAGE RANGE

11…MEASUREMENT VALUES

4-3 Connector

―11 ―

4-2 LCD DISPLAY

1…INSULATION RESISTANCE SCALE

2…BAR GRAPH

3…CONTINUITY SCALE

4…LIVE CIRCUIT WARNING

AC LIVE CIRCUIT

DISCHARGE VOLTAGE

WARNING

0〜2V 0〜2V

3〜30V 3〜60V

31〜60V 61〜120V

61〜120V 121〜240V

120V over 240V over

5…AUTONULL OPERATION

6…BATTERY VOLTAGE WARNING

7…CONTINUITY/INSULAATION RESISTANCE RANGE SETTING

8…UNIT

―10 ―

711

―13 ―

5. PREPARATION FOR MEASUREMENT

5-1 Removing the Cover

MODEL - 3005 have a dedicated cover to protect against an impact from

the outside and prevent the operation part, LCD, and connector socket

from becoming dirty. The cover can be detached and put on the back side

of the main body during measurement.

Method of removing the cover Method of storing the cover

5-2 Battery Voltage Check

①Set the function switch to any position except "OFF".

②When the battery voltage warning symbol ( ) is lit, the batteries are

exhausted. Replace all of them with new ones according to section 8

for battery & fuse replacement.

5-3 Test Probe Connection

Insert test probes fully into connector terminals of the instrument.

Connect test probe (black) to EARTH terminal and test probe (red) to

LINE terminal of connector terminal.

―12 ―

6. OPERATION

6-1 Disconnection and check of power source of the circuit under test

DANGER

●To avoid possible electrical shock, do not perform measurements on

energized (LIVE) circuits.

●Never make measurements with the battery compartment cover

removed.

CAUTION

●Never press the test button if the live circuit warning is indicated or the

warning buzzer sounds. This may damage the circuit.

Voltage check can be made with the range selector switch at any position.

Be sure to turn off the breaker for the circuit under test.

①Connect the test probe (black) to the earth side and the test probe (red) to

the line side of the circuit under test.

②Ensure that the live circuit warning is not lit and the audible warning is not

present. When the live circuit warning is lit and the buzzer sounds, never

press the test button. Voltage is generated in the circuit under test.

Recheck that the breaker for the circuit under test is "OFF".

④Read the resistance value from the LCD.

⑤With the test probe still connected to the circuit under test, release the test

button to discharge capacitance in the circuit after measurement.

DANGER

Do not touch the circuit under test immediately after testing. Capacitance

stored in the circuit may cause electric shock.

Leave test probes connected to the circuit and never touch the circuit until

the discharge is completed.

●Principle of Insulation Resistance Measurement

Resistance value can be obtained by applying a certain high voltage to the

resistance (insulation resistance) and measuring the flowing current.

Resistance Value = Voltage / Current

RX = V / I

―15 ―

6-2 Insulation Resistance Measurement

DANGER

●Always test the circuit or equipment to ensure it is surely de-energized

before measurement according to the instruction of 6-1.

●To avoid electrical shock, measurements must be performed on de-

energized circuits only.

●

When the test button is pressed with the range selector switch in the MΩ

position, take care not to touch the tip of the test probe and the circuit

under test where a high voltage is present in order to avoid possible

shock hazard.

●

Never make measurement with the battery compartment cover removed.

CAUTION

●Never press the test button if the live circuit warning is indicated or the

warning buzzer sounds. This may damage the circuit.

●Conduct the voltage warning check before measurement to ensure that

the circuit under test is de-energized.

①Check the voltage which can be applied to the circuit under test and set

the function switch and the range selector switch to the desired range.

②Connect the test probe (black) to the earth terminal of the circuit under

test.

③Put the tip of the test probe (red) to the circuit under test and press the

test button.

The buzzer sounds intermittently during measurement.

Current outputs from the earth terminal, and returns to the line terminal.

―14 ―

●Terminal connection of insulation resistance test

In case of testing insulation of insulated wire and cable against the earth

at direct current, connecting - pole of power to cable conductor, + to the

earth obtains smaller measuring value, compared with connecting the

other way round. This connecting method is generally acknowledged

relevant to detect defective insulation.

6-3 Continuity Measurement (Resistance Tests)

DANGER

●Always test the circuit or equipment to ensure it is surely de-energized

before measurement according to the instruction of 6-1.

●To avoid electrical shock, measurements must be performed on de-

energized circuits only.

●Never make measurement with the battery compartment cover

removed.

CAUTION

●Never press the test button if the live circuit warning is indicated or the

warning buzzer sounds. This may damage the circuit.

●When an additional circuit is connected in parallel with the circuit under

test , inaccurate reading may be taken.

①Set the function switch to the "AUTO NULL" position.

②Short the test probes (red) and (black) and press the test button. Then the

resistance of the test probes is displayed and memorized with

microprocessor.

③Set the function switch to "Ω" position.

④Connect the test probes to the circuit under test and press the test button.

⑤Read the resistance value from the LCD.

●NULL symbol ( ) is displayed while AUTO NULL function is working.

●AUTO NULL will be cancelled when the instrument is powered off.

●Principle of Continuity Measurement (Resistance Test)

Resistance value can be obtained by applying a certain current to the

resistance under test and measuring the voltage generated on the both

sides of the resistor under test.

Resistance value = Voltage / Current

RX = V / I

6-4 Continuous Measurement

A lock down feature is incorporated on the test button. Pressing and

turning it clockwise, lock the test button in the continuous operating

position.

To release the lock, turn the test button counterclockwise.

DANGER

Be extremely careful not to get electric shock during insulation resistance

measurement as high voltage is present on the tip of test probes

continuously.

―17 ―― 16 ―

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