Extech Instruments MA610 Manuale utente

USER MANUAL

600A AC Clamp Meter + NCV

Model MA610

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Introduction

Thank you for selecting the Extech MA610 Clamp Meter. This meter measures AC Current,

AC/DC Voltage, Resistance, Capacitance, Frequency, Diode Test, Duty Cycle, Continuity and Non-

Contact Voltage detection. This device is shipped fully tested and calibrated and, with proper

use, will provide years of reliable service.

Features

Large backlit LED display

30mm (1.2") jaw size fits conductors up to 500MCM

Relative and Zero mode functionality

Auto Power OFF (APO)

Non-Contact Voltage Detector

Visual and audible continuity measurement alert

Low battery indicator

CAT III 600V

Safety

To ensure the safe operation and service of the meter, follow these instructions closely. Failure to

observe warnings can result in severe injury.

WARNINGS

WARNINGS identify hazardous conditions and actions that could cause BODILY HARM or DEATH.

When handling test leads or probes, keep hands and fingers behind the finger guards at all times.

Remove test leads from the meter before opening the battery compartment or meter housing.

Use the meter only as specified in this User Manual or accompanying Quick Start to avoid compromising

the protections provided by the meter.

Be sure to use the proper terminals, switch positions, and ranges when taking measurements.

Verify the meter’s operation by measuring a known voltage. Have the meter serviced if the meter

responds unusually or if there are questions regarding the meter’s functional integrity.

Do not apply more than the rated voltage, as marked on the meter, between terminals or between any

terminal and earth ground.

Use caution working with voltages above 30 VAC RMS, 42 VAC peak, or 60 VDC. These voltages pose a

shock hazard.

To avoid misleading readings that could lead to electric shock and injury, replace the batteries as soon as

the low battery indicator is displayed.

Disconnect power to the circuit under test and discharge all high-voltage capacitors before testing

resistance, continuity, diodes, or capacitance.

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Do not use the meter in the presence of explosive gas or vapor.

To reduce risk of fire or electric shock, do not use the meter if it is wet and do not expose the meter to

moisture.

Individual protective equipment should be used if HAZARDOUS LIVE parts in the installation where

measurements are to be carried out could be accessible.

CAUTIONS

CAUTIONS identify conditions and actions that could cause DAMAGE to the meter or equipment

under test. Do not expose the meter to extremes in temperature or high humidity.

Disconnect the test leads from the test points before changing the position of the function (rotary)

switch.

Do not expose the meter to extremes in temperature or to high humidity.

Never set the meter to the resistance, diode, capacitance, or amp functions when measuring the

voltage of a power supply circuit; this could result in meter damage and damage to the equipment

under test.

Safety Symbols

This symbol, adjacent to another symbol, indicates the user must refer to

the manual for further information.

Risk of electrical shock

Equipment protected by double or reinforced insulation

Diode symbol

Capacitance

Battery symbol

Conforms to EU directives

Complies with USA and Canada requirements

AC measurement

DC measurement

Earth ground

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PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY

OVERVOLTAGE CATEGORY I

Equipment of OVERVOLT AGE CATEGORY I is equipment for connection to circuits in which measures are

taken to limit the transient over-voltages to an appropriate low level.

Note –Examples include protected electronic circuits.

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed

installation.

Note –Examples include household, office, and laboratory appliances.

OVERVOLTAGE CATEGORY III

Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.

Note –Examples include switches in the fixed installation and some equipment for industrial use with

permanent connection to the fixed installation.

OVERVOLTAGE CATEGORY IV

Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation.

Note –Examples include electricity meters and primary over-current protection equipment

Description

Meter Description

1. Transformer current jaws

2. Jaw opening trigger

3. M (Mode) button

4. Backlit LCD

5. Control buttons (see descriptions below)

6. COM negative input terminal

7. Positive input terminal

8. Function selector

9. NCV alert lamp

10. Backlight button

11. NCV sensor

Note: Battery compartment is located on back of meter

Fig. 1 –Meter Description

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Display Description

Relative mode icon

Units of Frequency

Alternating Current

Units of Voltage

Direct Current

Units of Capacitance

Negative readings

NCV

Non-contact AC Voltage

Detect

Diode mode

Automatic range mode

Continuity mode

Low Battery icon

Display Hold

Duty Cycle

Units of resistance

Measurement overload

Control Buttons

Mode button: Short press to step through the mode options for the selected

measurement function

HOLD button: Short press to freeze/unfreeze reading

Backlight button: Short press to turn backlight ON or OFF. Note that the backlight

button is on the upper right side of the meter.

For AC/DC voltage, AC current and Resistance modes: Short press to store the

displayed reading as a reference value. Subsequent measurements will be displayed

as ‘measurement minus reference value’. Short press to exit.

For Capacitance mode, short press to zero the display; the LCD will show the delta

symbol. Short press to exit this mode.

Short press to step through frequency (Hz) and duty cycle (%) measurements for the

Voltage and Hz switch positions.

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Operation

CAUTION: Read and understand all of the Safety statements listed in the safety section

of this manual prior to use.

Powering the Meter

1. Move the function switch to any position to power the meter. Check the batteries if the unit

fails to power ON.

2. Move the function switch to the OFF position to remove power to the meter.

3. The meter has an Auto Power OFF feature (APO) where the meter switches OFF after 30

minutes of inactivity. Press any button to recover from an APO condition.

Low battery indication

When the icon appears in the display, the battery should be replaced. Refer to the battery

replacement procedure in the maintenance section.

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AC Current Measurements

WARNING: Do not handle the meter above the finger/hand guard barrier.

CAUTION: Observe CAT III 600V with respect to Earth Ground for the Jaw.

1. Rotate the function switch to the desired AC Current position (4A, 40A, or 600A).

Start with the highest range setting (600A) and step down to lower ranges as needed,

especially for signals that are of an unknown range.

2. The Aand the AC symbols will appear on the display indicating AC Amperes (Amps).

3. Press the jaw trigger to open the clamp jaw.

4. Position the clamp around only one conductor. See Fig. 2 for correct and incorrect clamp

technique.

5. Read the current in the display. The display will indicate the proper decimal point and

value.

NOTES:

To ensure maximum accuracy, place the conductor at the center of the clamp head, otherwise

additional error (± 1.0%) may apply.

Fig. 2 –Correct and Incorrect ACA Clamping

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AC and DC Voltage Measurements

WARNING: Do not apply > 600VAC/DC between the meter terminals and ground.

CAUTION: When connecting the test leads to the circuit or device under test, connect

the black lead before the red lead; when removing the test leads, remove the red lead before

the black lead.

1. Set the function select switch to the Voltage position .

2. Use the M(Mode) button to select AC or DC Voltage.

3. Insert the black test lead banana plug into the negative (COM) jack and the red test lead

banana plug into the red (V) jack. See Fig. 3.

4. Touch the test probe tips to the circuit or part under test.

5. Read the voltage in the LCD. The display will indicate the proper decimal point and value.

6. Relative (REL) mode can be used to set a reference reading from which subsequent

readings will be offset (reference reading –actual reading = displayed reading). Short

press the REL button to store the displayed reading as a reference to which subsequent

measurements will be compared. Short press the REL button to exit the relative mode.

7. The meter can display the frequency (Hz) or duty cycle (%) of the measured voltage.

Short press the Hz % button to step through frequency and duty cycle readings.

8. Short press the Hbutton to freeze/unfreeze the displayed reading.

NOTES: The LCD displays OL when the input exceeds 1000V.

Fig. 3 –AC/DC Voltage Measurements

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Resistance Measurements

WARNING: Please remove power to the circuit under test and discharge all capacitors

before taking resistance or continuity measurements. The meter will display OL if the circuit

under test is an open circuit or if the measurement exceeds the maximum range of the meter.

Do not input a voltage >30V AC or DC.

1. Turn the function switch to the Resistance Ωposition.

2. Use the M(mode) button to select the ohm Ωdisplay symbol.

3. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test

lead banana plug into the red (Ω) jack. See Fig. 4.

4. Touch the test probe tips across the circuit or part under test. It is best to disconnect one

side of the part under test so that the rest of the circuit will not interfere with the

resistance reading.

5. Read the resistance in the display. The display will indicate the proper decimal point and

value.

6. Relative (REL) mode can be used to set a reference reading from which subsequent

readings will be offset (reference reading –actual reading = displayed reading). Short

press the REL button to store the displayed reading. The Relative icon (triangle) appears

when the Relative mode is active. Short press the REL button to exit the relative mode.

NOTE: When measuring resistance >1MΩ the meter may require several seconds to obtain a

stable reading.

Fig. 4–Resistance Measurements

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Continuity Measurements

WARNING: Please remove power to the circuit under test and discharge all capacitors

before taking resistance or continuity measurements. The meter will display OL if the circuit

under test is an open circuit or if the measurement exceeds the maximum range of the meter.

Do not input a voltage >30V AC or DC.

1. Turn the function switch to the Continuity position.

2. Use the M(mode) button to select the continuity display icon.

3. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test

lead banana plug into the red (Ω) jack. See Fig. 5.

4. Touch the test probe tips across the circuit or wire.

5. If the resistance is < 10Ω, the meter will beep. If the resistance is > 70Ω, the meter will

not beep. If the resistance is between 10 and 70Ω, the meter will stop beeping at an

unspecified point.

Fig. 5 –Continuity Measurements

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