Triplett MG600 Manuale utente

User Manual

MG600

Digital High Voltage Megohmeter/Insulation

Tester

Introduction

Congratulations on your purchase of the Triplett MG600 High Voltage

Megohmeter/Insulation Tester. This meter provides four Insulation

Resistance test ranges plus Continuity, AC/DC Voltage, Polarization

Index and Dielectric Absorption Ratio measurements.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates

the user must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal

use, hazardous voltages may be present.

Danger: identifies conditions and actions that pose hazard(s) to

the user.

Warning: alerts the user to avoid electric shock.

Caution: identifies conditions and actions that may damage

the Insulation Resistance tester.

Operating Caution: identifies conditions where the user needs to

take extra care during the operation of the Insulation resistance

tester

Danger: Use of this instrument in a manner not specified by the

manufacturer may impair safety features/protection provided by

the equipment. Read all of the safety information carefully

before using or servicing the instrument.

This symbol indicates that the meter uses double or reinforced

insulation.

Safety Notes

Do not exceed the maximum allowable input range for

any of the meter’s functions. Set the function switch OFF

when the meter is not in use.

Remove the batteries if the meter is to be stored for longer than 60 days.

Warnings

Set the function switch to the appropriate position before measuring. Do

not measure current on a circuit whose voltage exceeds 600V.

When changing ranges always disconnect the test leads from the circuit

under test.

Do not use the Insulation resistance tester if it is damaged or if metal

parts are exposed. Also, check the meter for cracks or missing

plastic.

Be careful when working above 30V AC rms or 30V DC. Such

voltages pose a shock hazard. Discharge all circuit loads under test

after measuring high voltage.

Do not replace the batteries with the tester in a wet environment.

Place the test leads in the proper input terminals. Ensure

that the test leads are firmly connected to the Insulation

Resistance tester’s input terminals.

Ensure that the Insulation Resistance tester is switched off

when opening the battery compartment.

Cautions

Improper use of this meter can cause damage, shock, injury or

death. Read and understand this user manual before operating

the meter.

Always remove the test leads before replacing the batteries.

Inspect the condition of the test leads and the meter itself for any

damage before operating the meter. Repair or replace any damage

before use.

Voltage checks on electrical outlets can be difficult and misleading

because of the uncertainty of a definitive connection to the

recessed electrical contacts. Other means should be used to

ensure that the outlet terminals are not "live".

If the equipment is used in a manner not specified by the

manufacturer, the protection provided by the equipment may be

impaired.

Do not use the Insulation resistance tester near explosive gas, vapor or

dust.

When using the test leads, keep fingers away from the lead

contacts. Keep fingers behind the test lead finger guards.

Do not use the tester if its cover or any of its parts are removed.

When performing resistance tests, remove all power from the circuit

under test.

When servicing the Insulation Resistance tester, use only the

supplied test leads and power adaptor.

Do not use the Insulation resistance tester if the battery indicator shows

a low battery.

Do not use or store the meter in areas of high humidity, high

temperature, potentially explosive or flammable environments, or in

strong magnetic fields.

Soft cloth and mild detergent should be used to clean the surface

of the Insulation resistance tester when servicing. Do not use

abrasives or solvents.

Dry the Insulation resistance tester before storing if it is wet.

Remove the test leads and set the Range selector switch to the OFF

position after use.

Safety Category Information

This Insulation resistance tester complies with IEC61010 standard

safety measurement requirements: pollution degree 2, over-voltage

category (CAT. IV) 600V, with double insulation.

Meter Description

1. Insulation resistance Test/Lock

switch

2. REL /down button

3. HOLD button

4. BATT /up button

5. MAX /MIN /STOP button

6. LCD Display

7. DC power adaptor Input

8. EARTH Input

9. VΩ input and IR GUARD

terminal

10. VΩ COM input and High voltage

shielding terminal

11. LINE: 500V to 500V High

Voltage Input

12. /PEAK button

13. Backlight /AUTO OFF button

14. Function Selector Switch

Display Description

1. Timed Test Indicators

2. AC/DC Indicators

3. Polarization Index and Dielectric Absorption Ratio Indicators

4. Analog Bargraph

5. Auto Range Indicator

6. Low Battery Indicator

7. High Voltage Indicator

8. Auto discharge Indicator

9. Continuity Buzzer Indicator

10. PASS /FAIL Indicator

11. Live Circuit Voltage Indicator

12. Units Indicator

13. Function Indicator

14.Function Indicator

Insulation Resistance Testing

CAUTIONS:

Ensure that no electrical charge

exists on the circuit under test.

Insulated gloves should be worn

while testing.

Use extreme caution to avoid touching the tips of the test

leads or the circuit under test when the PRESS TO TEST

button is pressed; High Voltage is present.

Do not make measurements when the battery cover is removed.

Always connect the Earth Cord (black) to the Earth terminal of the

circuit under test.

CAUTION: When the live circuit warning indicates “>30V” or the

warning buzzer sounds and

the display flashes, the measurement

cannot be made even if the “Press to Test” button is

pressed.

DANGER

Do not touch the circuit under test immediately after testing.

Voltage stored in the circuit may cause electric shock.

Leave the test leads connected to the circuit under test and

never touch the circuit until the discharge is complete.

PRESS TO TEST Knob

All insulation resistance tests are initiated

with the PRESS TO TEST knob.

1. Press and HOLD the knob to perform a

test. Release the knob to end the test.

2. Press and TURN the knob 90 degrees clockwise to the LOCK

position to lock the meter in the continuous

test mode. To end a test, either rotate the

knob 90 degrees counterclockwise or

press the STOP button.

3.Always return the knob to the vertical

position before beginning a test

Emergency Stop

To stop a test at any time, press the STOP button or rotate the PRESS

TO TEST knob in a counter-clockwise direction.

The STOP button also clears the display and beeper after a discharge is

complete.

Insulation Resistance Test

Manual Test

1. Connect the Black

Earth test lead to the

Earth connector and

the Red test lead to the

LINE and COM

connectors.

2. Set the Function

Selector switch to the

desired insulation test

voltage.

3. Connect the test leads to

the device under test.

4. Press and hold the

PRESS TO TEST

button to run the test.

The buzzer will beep

during the test.

5. Read the measured value on the LCD display.

6. Release the button to end the test and

discharge the device. While the circuit is

discharging, the icon will

flash. The measured value, HOLD and the

measurement time will remain in the display.

7. Press the STOP button to clear the display.

8. Set the Function Selector switch to OFF position and remove the test

leads from the circuit.

Locked Test

1. Repeat steps 1 to 3 as above.

2. Press and turn the PRESS TO TEST button to the lock position to

run the test. The buzzer will beep during the test.

3. Read the measured value on the LCD display.

4. Rotate the PRESS TO TEST button to the PRESS TO TEST position

to end the test and discharge the device. While the circuit is

discharging, the icon will flash. The measured value,

HOLD and the measurement time will remain in the display.

5. Press the STOP button to clear the display.

6. Set the Function Selector switch to OFF position and remove the test

leads from the circuit.

Timed Insulation Test

The timed insulation test feature allows the user to specify the period of

time the test will run. The run time can be set from 1 to 15 minutes in 1

minute increments.

1. Connect the Black Earth test lead to the Earth connector and the Red

test lead to the LINE and COM connectors.

2. Connect the test leads to the device under test.

3. Set the Function Selector switch to the desired insulation test

voltage.

4. Use the Time Set ▲ and ▼ arrow buttons to select the desired run

time for the insulation test. The selected time will be shown in the

lower left corner of the LCD.

5. Press and hold the PRESS TO TEST knob (or lock it). The beeper

will sound and the voltage warning icon will flash at one second

intervals during the test.

6. At the end of the timed period, keep the test leads connected the

meter will the device and the results will be held in

the display

7. Release or unlock the PRESS TO TEST knob and press the STOP

button to clear the display.

8. Set the Function Selector switch to the OFF position and remove the

test leads from the circuit.

Polarization Index (PI)

The polarization index Test calculates the ratio of the resistance

measurement after 10 minutes to the resistance measurement after 1

minute: Results are determined by the type, age and condition of the

insulation material tested. Established standards and test procedures

should be used to establish pass/fail criteria for each application.

Polarization Index = Resistance after 10 minutes / Resistance after 1 minute

1. Connect the Black Earth test lead to the Earth connector and the Red

test lead to the LINE and COM connectors.

2. Connect the test leads to the device under test.

3. Set the Function Selector switch to the desired insulation test

voltage.

4. Use the PI/DAR button to select TIME 1 (1:00) for the Polarization

Index (PI) function.

5. Press and hold the PRESS TO TEST button and turn it clockwise

to the LOCK position. The beeper will sound during the test.

6. When the test has completed, the LCD will display PASS if the

Polarization Index is greater than 1. FAIL will be displayed if the

Polarization Index is below 1.

7. Keep the test leads connected to the equipment under test and

release the PRESS TO TEST button. The circuit will discharge

through the meter. While the circuit is discharging, the

icon will flash.

8. Press the STOP button to clear the results

Insulation Resistance Measurement Considerations

The Resistance of an insulator is determined by applying a test

voltage to the insulator and then measuring the subsequent

current flow.

Notes:

The insulation resistance of a device may not be stable

therefore the readings supplied by the meter may vary.

An audible beep will be heard while a test is in progress, this is

normal.

Measurements taken on a capacitive load may take some time to

complete.

Insulation Resistance tests output a positive (+) voltage

from the Earth terminal and a negative (-) voltage from the

Line terminal.

Use of the Guard Terminal

When measuring a cable, leakage current flowing on the surface of

cable’s jacket and the current flowing inside the cable’s insulator combine

and may cause measurement errors. In order to prevent such errors, a

conductive wire should be wound around the point where leakage current

flows. The conductive wire should then be connected to the Guard

terminal as shown in accompanying figure. Be sure to use only the Guard

cable supplied with this instrument to connect the instrument to the Guard

terminal.

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