Sanwa MG500 Manual

Sanwa Måleudstyr MG500

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07-1409 2040 6012

[1] SAFETY PRECAUTIONS

Before use, read the following safety precautions.

Thank you for purchasing the Sanwa MG1000/MG500 digital insulation

resistance tester. Before use, please read this manual thoroughly to ensure

correct and safe use. Keep this Instruction Manual together with the product.

Be sure to read the information under “ WARNING” that is intended to prevent

personal injury such as burn and electric shock and other serious accidents.

1-1 Explanation of Warning Symbols

The meaning of the symbols used in this manual and attached to the product is

as follows:

: Very important instructions for safe use

•The warning messages are intended to prevent accidents to operating

personnel such as burn and electric shock.

•The caution messages are intended to prevent incorrect handling and

measurement which may damage the product.

: Dangerous voltages

: Ground. : DC. : AC.

: Fuse. : Double or enhanced insulation.

1-2 Warning Messages for Safe Use

WARNING

The following instructions are intended to prevent personal injury such as burn and

electric shock. Be sure to follow them when using the tester:

1-3 Overload protection

The maximum rated input value and overload protection have been defined for

the input terminals of each function as shown below.

Function Max. Rated Input Overload Protection

MΩ -

Ω

range: Within 120 % of the rated measuring voltage.

V 600 Vrms 780 Vrms

4000 Ω - 600 Vrms

40 Ω - Fuse, 0.5 A / 600 V

Measurement Category (Overvoltage Category)

Overvoltage measurement category II (CAT. II ) :

Line on the primary side of equipment with power cord to be connected to the

receptacle.

Overvoltage measurement category III (CAT. III ) :

Line from the primary side or branch of equipment which directly takes in

electricity from a distribution board to the receptacle.

Overvoltage measurement category IV (CAT. IV ) :

Line from the service conductor to the distribution board.

[2] APPLICATIONS AND FEATURES

2-1 Applications

This instrument is a DC insulation resistance tester for use in measurement of

insulation resistance of a power line and power equipment within the range of

600 V under CAT III.

2-2 Features

• Safety design in compliance with IEC61010-1

• MΩ function with automatic live circuit detection (>30 V AC/DC)

• Easy-to-read display showing large figures and log bar graph for reading in an

analog feeling

• Automatic hold function to hold the last displayed value to look it safely after

measurement

• LCD panel with backlight function

• Auto discharge function

• 40.00 Ω measurement function ( 200 mA short circuit current)≧

[3] NAMES AND FUNCTIONS OF COMPONENT UNITS

WARNING

1. Never use the tester on a high-power or high-voltage line.

2. Voltages above 70 VDC or 33 Vrms AC (46.7 V peak) are hazardous to

human body. Never touch them.

3. Disconnect circuit power before testing insulation resistance.

4. Use caution with the high voltages output when performing insulation

resistance measurement to avoid electric shock.

5. To prevent electric shock, always discharge capacitive circuits after the

insulation resistance measurement.

6. Never input signals exceeding the maximum rated input value (see 1-3).

7. Never use the tester for measuring voltages of lines connected to

equipment (e.g. motors) that generates induced or surge voltage since it

may exceed the maximum allowable overload input.

8. Never use the tester if the tester or test leads are damaged or broken.

9. Never use the tester with the rear-case or battery lid removed.

10. When using the test leads, keep your fingers behind the finger guards.

11.

During measurement, do not change the function or range nor replace the plugs.

12. Never use the tester when it is wet or with wet hands.

13. Be sure to use the fuse of the specified rating and specification.

14. When connecting the alligator clip, connect it to the grounding side of the

object to be measured first. When disconnecting it, disconnect the test

lead from the line first, and then disconnect the teat lead from the

grounding side of the measured object.

15.

Never attempt repair or modification, except for battery and fuse replacement.

16. Inspect the tester at least once a year.

17. This tester is for indoor use only.

18. Never use the tester near equipment that generates strong

electromagnetic waves or is charged.

19. Do not use the instrument in a place where corrosive or explosive gas is

produced.

CAUTION

1. The measuring terminals ou put high voltages during insulation resistance t

measurement.

To prevent damaging the tester and parts (including chips) with low or unknown

withstanding voltages, connected to the measured electrical path (circuit), it is

recommended to disconnect them from the electrical path before

measurement. This care is specially important with computer equipment.

2. The rated measuring voltage used in insulation resistance measurement

should be as close as possible to the operating voltage of the circuitry to

measure. For example, when measuring an electrical path of 200 V, it is

recommended to use a tester with a rated measuring voltage of 250 V.

While measuring insulation resistance, it will probable take time to get

steady result value on display in case that there is electrostatic capacitance

in the measured circuit.

Instrument body LCD panel

When pressed for more than 2 seconds, continuous test

voltage is output and indication appears. To release

the lock, press the LOCK or MEASURE button, the test

voltage output is stopped, the circuit under test is

discharged automatically, and the last displayed value

appears on the display together with the indication.

40 Ω measurement function:

When pressed for more than 2 seconds, indication

appears and the tester continues measuring. To release

the lock, press the LOCK or MEASURE button. The

measurement is stopped and the last displayed value

appears on the display together with the indication.

Turns backlight on/off. The backlight goes off

automatically after 10 seconds.

•When the LIGHT button is pressed during MΩ

measurement

which is performed by holding the MEASURE button, the

generation of the measurement voltage is interrupted and

the displayed value shows the indication.

Zero Ohm adjustment for 40

measurement function or

when selecting the maximum M

measurement function.

Turns the tester ON/OFF or to select a function. The body cover

cannot be closed unless this switch is set to the OFF position.

Lights up in MΩ measurement function. It blinks when

the test voltage drops below rated value.

Lights up when the input is about 30 V AC/DC or more.

It can be used as the live circuit detection, etc.

Space to store the test leads and alligator clips.

To attach a strap.

Numeral and decimal point

AC voltage operation indicator

Negative value indicator

MΩ measurement function:

Lights up when the tester outputs test voltage.

Lights up when the object to be measured is charged

about 30 V or more.

V measurement function:

Lights up when the input is 600 Vrms or more.

DC voltage operation indicator.

Auto Power Save mode indicator

The tester enters “power save mode” automatically if it

has not been operated for about 30 minutes. The tester

come out of “power save mode” when power/function

switch is turned to OFF once and set to the required

function again.

To cancel Auto Power Save function, turn the

power/function switch from OFF position to any desired

function while holding the LIGHT button pressed.

*A small electric current from power supply is present in

Auto Power Save mode. Be sure to set the

power/function switch to “OFF” after measurement.

Data Hold indicator

Test lock (continuous test voltage output) indicator

0 Ω adjustment indicator

Low battery warning indicator:

Appears when the batteries are exhausted (to about

7.2 V or less). When the indicator appears or blinks,

replace the batteries with new ones.

Unit indicators.

Logarithmic bargraph

Disabled in the 40 Ω measurement function

LOCK button

LIGHT button

0 Ω ADJ button

Power/function

switch

RATING VOLTAGE

indicator

ALARM indicator

Test lead storage space

Strap hook

4-2 Measurement Range and Accuracy

Temperature 23 ± 5℃, humidity 45 % to 75 % RH.

rdg: Reading. dgt: Digits

4-2-1 Insulation resistance measurement functions (kΩ , MΩ)

Model:MG1000

Model:MG500

Nominal test voltage &

Measurement Range

250 V

4.000 MΩ/40.00 MΩ

400.0 MΩ/4000 MΩ

500 V

4.000 MΩ/40.00 MΩ

400.0 MΩ/4000 MΩ

Center

scale

10 MΩ

1st effective

measurement range

0.500 20.00 M～Ω

±(3 %rdg+4 dgt)

2nd effective

measurement range

1st effective

measurement range

2nd effective

measurement range

1st effective

measurement range

2nd effective

measurement range

0 0.499 M～

20.01 4000 M～

±(5 %rdg+5 dgt)

100 MΩ

1.000 500 M～Ω

±(3 %rdg+4 dgt)

0 0.999 M～Ω

501 4000 M～Ω

±(5 %rdg+5 dgt)

1000 V

4.000 MΩ/40.00 MΩ

400.0 MΩ/4000 MΩ

100 MΩ

2.000 1000 M～

±(3 %rdg+4 dgt)

0 1.999 M～

1001 4000 M～

±(5 %rdg+5 dgt)

Measurement Range Accuracy

Open circuit voltage 1 to 1.25 times of nominal test voltage

Rated current

1.0-1.2 mA (250 V @0.25 MΩ, 500 V @0.5 MΩ, 1000 V @1 MΩ)

Short-circuit current 2 mA or less

Live circuit detection

At ≧30 V AC/DC or more, inhibits test, buzzer sounds and

ALARM indicator lights up.

Nominal test voltage &

Measurement Range

Center

scale

1 MΩ

1st effective

measurement range ±(3 %rdg+4 dgt)

2nd effective

measurement range

1st effective

measurement range

2nd effective

measurement range

1st effective

measurement range

2nd effective

measurement range

±(5 %rdg+5 dgt)

10 MΩ

±(3 %rdg+4 dgt)

±(5 %rdg+5 dgt)

100 MΩ

±(3 %rdg+4 dgt)

±(5 %rdg+5 dgt)

Measurement Range Accuracy

Open circuit voltage 1 to 1.3 times of nominal test voltage

Rated current

1.0-1.2 mA (125 V @0.125 M

, 250 V @0.25 M

, 500 V @0.5 M

)

Short-circuit current 2 mA or less

Live circuit detection

At ≧30 V AC/DC or more, inhibits test, buzzer sounds and

ALARM indicator lights up.

125 V

400.0 kΩ

4.000 MΩ/40.00 MΩ

400.0 MΩ/4000 MΩ

250 V

400.0 kΩ

4.000 MΩ/40.00 MΩ

400.0 MΩ/4000 MΩ

20.0 kΩ～10.00 MΩ

0 19.9 k～

10.01 4000 M～

50.0 kΩ～20.00 MΩ

0 49.9 k～

20.01 4000 M～

500 V

400.0 kΩ

4.000 MΩ/40.00 MΩ

400.0 MΩ/4000 MΩ

100.0 kΩ～500 MΩ

0 99.9 k～

501 4000 M～Ω

[4] SPECIFICATIONS

4-1 General Specifications

Grounding/COM terminal for connecting the black alligator clip.

Line/+ terminal for connecting the red test lead.

Displays the value, function name or voltage output

status.

MΩ measurement function:

• Press and hold the button to output the test voltage.

When the button is released, the test voltage output

is stopped, the circuit under test is discharged

automatically, and the last displayed value appears

on the display together with the indication.

• When the button is pressed during continuous test

voltage generation using the LOCK button, the test

voltage is stopped, the last displayed value is held,

and the circuit under test is discharged automatically.

40 Ω measurement function:

• Press and hold the button to start measuring. When

the button is released, the test voltage output is

stopped and the last displayed value is held appears

on the display together with the indication.

• When the button is pressed during continuous

measurement using the LOCK button, the

measurement is stopped and the last displayed value is held.

Name Description

EARTH/COM terminal

LINE/+ terminal

LCD panel

MEASURE button

Note

When the displayed value is 2000 MΩ or more, the lowermost digit is fixed at 0.

“OL” indication on LCD

V function: 780 V or over

MΩ, 4000 Ω, 40 Ω function: Approx. 4200 count or over

AC Sensing

LCD

Sampling rate

Polarity indication

Low battery indication

Environmental condition

Power supply

Average value

4200 count with log bar graph

Approx. 2 times / sec.

“ ” indication only when negative input－

“ ” lights or flickers at about 7.7 V-7.2 V or below

Altitude 2000 m or below, pollution degree 2

Auto only

Range up: approx. 4200 count or over,

Range down: approx. 380 count or below

Range selection

Over-range indication

Operating temperature /

humidity

0 ℃ to 40 ℃ and maximum relative humidity 90 %

(No condensation)

Storage temperature /

humidity

-10 ~ 50 , 70 %RH or below (with battery removed). ℃ ℃

R6P 1.5 V x 6 pcs (MG500) ; LR6 1.5 V x 6 pcs (MG1000)

At 5-sec. ON / 25-sec. OFF

* Insulation resistance measurement principle:

Detecting a current flowing through the circuit to be

measured being applied a DC voltage, the insulation

resistance is calculated from "the voltage / the current".

Operating instrumental uncertainty:

30 %

variation due to changing "E1：Position, E2：Supply voltage, E3:Temperature"

（This specification describes maximum values accepted by the standard.）

MG1000/MG500

INSTRUCTION MANUAL

Dempa Bldg , 4-4 Sotokanda 2-Chome.

Chiyoda-ku, Tokyo, Japan

170 ( ) X 142 ( ) X 57 ( )L W H

Approx. 600 g (battery included)

Apporox. 7 mA at V function

test leads (TL-112a), Strap (ST-50), instruction manual

Dimensions

Mass

Power consumption

Accessories

Safety

EMC

IEC61010-1, IEC61010-2-030, IEC61010-2-033 CAT.III 600 V

IEC61557-1/2/4, IEC60529-IP54, IEC61010-031

IEC61326

MG500 : Approx. 500 times (with manganese battery)

MG1000 : Approx. 300 times (with alkaline battery)

Time of

measurement *

INSULATION RESISTANCE TESTER

Test lead (TL-112a)

Removable test pin covers

When not covered：CAT. 1000 VⅡ

When covered：CAT. 600 VⅢ

Strap (ST-50)

Finger

guards

Plugs

Test pins

When not covered

Removable screw-in

test pin cover (rotate

to remove)

12 12

18 19 20 21 22

567

Produkt Specifikationer

Mærke:	Sanwa
Kategori:	Måleudstyr
Model:	MG500

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