Sanwa MG1000 Handleiding

Sanwa Meetapparatuur MG1000

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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

4-2-2 Voltage measurement function (AC/DCV)

Range Resolution Accuracy

Input Resistance

Max. Overload Protection

AC/DC 600 V

1 V

(3 %rdg+2 dgt) 9 M 780 VrmsΩ

Note

ACV and DCV are automatically detected.

Sensitivity: 2 V or higher.

AC frequency bandwidth: 45-400 Hz

The ALAMP indicator lights up when the input is ≧30 V AC/DC.

“ ” appears and buzzer sounds if the input is 600 Vrms.≧

Maximum display value: 780 V.

4-2-3 4000 measurement function / Continuity buzzer ( )Ω Ω

Range Resolution Accuracy

Input Resistance

Max. Overload Protection

4000

Ω 1 Ω

(3 %rdg+3 dgt) 3 V 600 Vrms

Note

A buzzer sounds below about 40 Ω.

A buzzer sounds and the ALARM indicator lights up when the input is 30 V ≧

AC/DC.

4-2-4 40 measurement function ( )Ω Ω

Display Range 40.00 Ω

Measurement range 0.01 to 40.00 Ω Ω

Accuracy

(3 %+ 10 dgt) (after 0 Ω ADJ)

Resolution 0.01 Ω

Open Circuit voltage 6 V (typical value)

Short-circuit current 200 mA minimum ( 2.0 )Ω

Protection Fuse (0.5 A/600 V)

Note

The bargraph display is disabled.

[5] MEASURING PROCEDURE

5-1 Opening/closing the body cover

The body cover cannot be closed unless

the function switch is OFF.

5-2 Start-up inspection

5-3 Voltage measurement method

Note

ACV and DCV are automatically

detected.

5-4 Insulation resistance measurement method

5-4-1 Buttons used in the measurement

Measurement: button, button (to set the max test voltage function)MEASURE 0 Ω ADJ

Continuous measurement: and buttons.LOCK MEASURE

5-4-2 Measurement method

1. Connect the test leads to the object (circuit) to be measured.

If the object to be measured is a live circuit ( 30 V AC/DC), the voltage is ≧

displayed, buzzer sounds, and the ALARM indicator lights up. In this case, the

test voltage cannot be output by pressing the MEASURE or LOCK button.

Disconnect the power supply from the object to be measured and try again.

2. Output the test voltage.

Start measurement ( button) Continuous measurement ( button)MEASURE LOCK

3. End the measurement. 3. End of continuous measurement

At the moment the test voltage output is stopped, the last displayed value is held

automatically ( indication) and the measured object (circuit) is discharged

automatically.

When the measured object (circuit) is discharged below 30 V, the indicator

goes off.

Note

1. An oscillation tone may be heard during measurement, but this is not malfunction.

2. The automatically held value is retained until the start of the next measurement

or the tester enters APS mode. The held value is released and the new

measurement value is displayed when the next measurement is started.

If a measuring point of certain equipment for insulation resistance measurement is

unknown, contact the manufacturer of that equipment to ensure correct measurement.

5-5 4000 Resistance measurement / Continuity check methodΩ

5-5-1 Buttons used in measurement

No button is used.

5-5-2 Measurement method

1. Set the power/function switch to “4000 .”Ω

2. Connect the test lead to the object to be measured.

3. Read the displayed value.

5-6 40 measurement methodΩ

5-6-1 Buttons used in measurement

Measurement: button and button.MEASURE 0 Ω ADJ

Continuous measurement: button, and button.LOCK 0 Ω ADJ MEASURE

5-6-2 Measurement methods

Method using the button:MEASURE

1. Set the function switch to “40.00 .” Ω

2. Short-circuit the test leads, press the MEASURE button, and release the

MEASURE button when the tester detects a stable reading. The displayed

value will be held.

3. Press the 0 Ω ADJ button to reset the displayed value to “0.00 .” [0 Ω Ω ADJ]

should light up at this time.

4. Connect the test leads to the object to be measured, and press the

MEASURE button.

5. To end measurement, release the MEASURE button. The last displayed

value will be held automatically.

Method using the button:LOCK

1. Set the function switch to “40.00 .” Ω

2. Short-circuit the test leads and press the LOCK button.

3. When the tester detects a stable reading, press the 0 Ω ADJ button to reset

the displayed value to “0.00 .” [0 ADJ] should light up at this time. Ω Ω

Connect the test leads to the object to be measured and read the displayed value.

5. To end measurement, press the MEASURE or LOCK button. The last

displayed value will be held automatically.

Caution: The measurement consumes a large amount of current. Use caution

with the battery exhaustion.

The displayed value may not become depending on the “ ”0.00

contact condition while shorting the test leads.

[6] MAINTENANCE

6-1 Maintenance inspection

1) Appearance: Is the meter not damaged due to falling or other cause?

2) Test leads: Are the test leads not damaged, or is the core wire not exposed

from any part or broken?

If any of the above problems exists, stop using the meter and request for repair.

6-2 Calibration / Inspection

For more information, please contact your dealer or Sanwa agent.

6-3 Storage

Check if the instrument body appears damaged.

Check if appears on the top right of the LCD. If

appears or blinking, replace all batteries with new ones (see

section 6-4-1).

Select the 4000 measurement function, short the test lead Ω

and alligator clip, and ensure the displayed value is no more

than 1 . If “OL” is displayed, replace the test leads as they Ω

may be damaged.

Select the 40 measurement function, short the test lead and Ω

alligator clip, and ensure the displayed value is no more than

0.05 Ω. If “OL” is displayed, replace the fuse as it may be

damaged (see section 6-4-2).

Inspection/ Check

Appearance

Batteries

Test leads

Fuse

Method

The test voltage is output when the MEASURE

button is held pressed. appears and short

buzzer sounds during this operation.

Press and hold the button for more than LOCK

2 seconds to output the test voltage

continuously. and appears and short

buzzer sounds during this operation.

6-4 Battery / Fuse replacement

Battery when the meter is shipped:

A battery for monitoring has been installed prior to shipment from the factory. It

may be discharged before the expiration of the described battery life.

*The battery for monitoring is a battery used to check the functions and

performance of the product.

6-4-1

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

Note: Use caution with battery polarity when replacing batteries.

6-4-2 Fuse replacement

Fuse: Part No. F1202, Ø6.3 X 32 mm, 0.5 A/600 V, breaking capacity 20 kA.

[7] AFTER-SALE SERVICE

7-1 Warranty and Provision

Sanwa offers comprehensive warranty services to its end-users and to its product

resellers. Under Sanwa's general warranty policy, each instrument is warranted to

be free from defects in workmanship or material under normal use for the period of

one (1) year from the date of purchase.

This warranty policy is valid within the country of purchase only, and applied only

to the product purchased from Sanwa authorized agent or distributor.

Sanwa reserves the right to inspect all warranty claims to determine the extent to which

the warranty policy shall apply. This warranty shall not apply to disposables batteries,

or any product or parts, which have been subject to one of the following causes:

1. A failure due to improper handling or use that deviates from the instruction

manual.

2. A failure due to inadequate repair or modification by people other than Sanwa

service personnel.

3. A failure due to causes not attributable to this product such as fire, flood and

other natural disaster.

4. Non-operation due to a discharged battery.

5. A failure or damage due to transportation, relocation or dropping after the

purchase.

7-2 Repair

Customers are asked to provide the following information when requesting services:

1. Customer name, address, and contact information

2. Description of problem

3. Description of product configuration

4. Model Number

5. Product Serial Number

6. Proof of Date-of-Purchase

7. Where you purchased the product

Please contact Sanwa authorized agent / distributor / service provider, listed in

our website, in your country with above information. An instrument sent to Sanwa

/ agent / distributor without above information will be returned to the customer.

Note:

1) Prior to requesting repair, please check the following:

Capacity of the battery, polarity of installation and discontinuity of the test leads.

2) Repair during the warranty period:

The failed meter will be repaired in accordance with the conditions stipulated in

7-1 Warranty and Provision.

3) Repair after the warranty period has expired:

In some cases, repair and transportation cost may become higher than the price of

the product. Please contact Sanwa authorized agent / service provider in advance.

The minimum retention period of service functional parts is 6 years after the discontinuation

of manufacture. This retention period is the repair warranty period. Please note, however, if

such functional parts become unavailable for reasons of discontinuation of manufacture,

etc., the retention period may become shorter accordingly.

4) Precautions when sending the product to be repaired To ensure the safety of the

product during transportation, place the product in a box that is larger than the

product 5 times or more in volume and fill cushion materials fully and then clearly

mark “Repair Product Enclosed” on the box surface. The cost of sending and

returning the product shall be borne by the customer.

7-3 SANWA web site

http://www.sanwa-meter.co.jp/

E-mail: exp_sales@sanwa-meter.co.jp

Release the button to stop MEASURE

outputting the test voltage.

Press the or button to MEASURE LOCK

stop outputting the test voltage.

WARNING

1. Be sure to conduct the start-up inspection described in section 5-2 below.

2. Before measurement, disconnect power supply from the object (circuit) to

be measured.

3. After measurement, be sure to discharge the high voltage charged in the

measured object.

4. During measurement, keep your fingers behind the finger guards of the test

leads and do not touch the metallic part of the alligator clips.

5. After measurement, be sure to turn the power/function switch to “OFF”

position to prevent electric shock and battery exhaustion.

CAUTION

1. When selecting the maximum test voltage (insulation resistance

measurement), hold the 0 _ ADJ button pressed while turning the

power/function switch. Otherwise, the display shows “Err0” and the test

voltage will not be output even if the MEASURE or LOCK button is pressed.

2. When the object to be measured is grounded, usually the alligator clip is

connected to the ground (EARTH) and the test lead to the measured circuit

(LINE). (This connection method usually results in a lower measurement

value than the opposite connection method.)

3. To prevent measurement errors, prevent the test lead connected to the

LINE terminal from touching the object to be measured or ground whenever

possible.

4. The insulation resistance varied greatly depending on the temperature and

humidity as well as on the output voltage (test voltage). In general, higher

temperature, humidity and/or output voltage mean lower insulation

resistance.

5. Measurement is inhibited if voltage ( 30 V AC/DC) is present in the circuit.≧

6. Keep in mind that the time of auto discharge will be delayed if fuse has

broken.

WARNING

1. The following instructions are very important for safety. Read this manual

thoroughly to ensure correct maintenance.

2. Calibrate and inspect the meter at least once a year to ensure safety and

maintain its accuracy.

CAUTION

1. The panel and case are not resistant to volatile solvent and must not be

cleaned with thinner or alcohol.

2. The panel and case are not resistant to heat. Do not place the tester near

heat-generating devices.

3. Do not store the tester in a place where it may be subjected to vibration or

from where it may fall.

4. Do not store the tester in places under direct sunlight, or hot, cold or humid

places or places where condensation is anticipated.

5. If the tester will not be used for a long time, remove the battery.

WARNING

1. If the rear case is removed with an input being applied to the measuring

terminals, you may suffer electric shock. Before starting replacement,

always make sure no input is being applied and the function switch is OFF.

2. Be sure to use the fuse of the specified rating and specification. Never use

a substitute nor short the fuse terminals.

Spare fuse

(optionally available)

Short beeps

GND

In case of Live circuit

OFF

Green

indication

ON/blinking

Red indicator ON

Hold for

more than

2 sec. and

then release.

Beep

Grounding

side

(EARTH)

Line side

(LINE)

Release

Red

indicator

Buttons used

MΩ

MΩ MΩ

MΩ

Short beeps

Green

indication

ON/blinking

Press

Press here

here.

Product specificaties

Merk:	Sanwa
Categorie:	Meetapparatuur
Model:	MG1000

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