Triplett MG600 User manual

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.