Extech Instruments MA3110 Manuale utente

USER MANUAL

3000A TRUE RMS AC Flexible Clamp Meter

Model MA3110

Additional User Manual Translations available at www.extech.com

MA3110-en-GB_V1.0 12/16

Introduction

Thank you for choosing the Extech Model MA3110 Flexible AC Clamp meter with automatic

ranging, data hold, and auto power OFF. The MA3110 is a professional CAT III 1000V instrument

that measures up to 3000A AC RMS. The MA3110 also measures DC and AC Voltage, Resistance,

Capacitance, Diode, and Continuity (beeper). This device is shipped fully tested and calibrated

and, with proper use, will provide years of reliable service. Please visit our website

(www.extech.com) to check for the latest version of this User Guide, Product Updates, Product

Registration, and Customer Support.

Features

600A and 3000A AC True RMS Current Measurement ranges

AC (True RMS) and DC Voltage Measurements

Automatic ranging

Meets IEC61010-1, 3rd Edition (2010) CAT III 1000V Safety requirements.

Resistance, Capacitance, Diode, and Continuity Beeper

Data Hold feature freezes displayed reading

6000 count large scale LCD display

Convenient Flexible Clamp with locking mechanism

8mm (0.3”) coil diameter for measuring in tight spaces

Coil length 300mm (11.8“)

Auto Power OFF after 15 minutes of inactivity

Overload Protection for most ranges

Durable, long-lasting components, enclosed in strong, lightweight ABS-plastic housing.

MA3110-en-GB_V1.0 12/16

Safety Information

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

observe warnings can result in severe injury.

Precautions and Preparations for Measurements

Ensure that the batteries are connected in the correct polarity and placed in the battery

compartment (rear) correctly.

Place the red and black test leads into the proper input terminals before making

measurements.

Remove the test leads from the circuit under test when changing the measurement ranges.

Do not exceed the maximum rated voltage and current on the meter input terminals.

Remove the battery if the meter is to be stored for long periods

Replace the test leads only with ones rated for CAT III 1000V or better.

The meter has an automatic power OFF (APO) utility that switches the meter OFF after 15

minutes of inactivity. Press any key to wake the meter. To disable this feature, press and

hold the M (mode) button while switching the meter ON.

Warnings

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

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

where measurements are to be carried out could be accessible.

If the equipment is used in a manner not specified by the manufacturer, the protection

provided by the equipment may be impaired.

To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.

Verify the meter operation by measuring a known current. If in doubt, have the meter

serviced.

Do not apply more than the rated voltage/current as marked on the meter.

To avoid false readings that can lead to electric shock and injury, replace battery as soon as

the low battery indicator appears.

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

Do not use a flexible current sensor if the inner copper wire of the flexible cord is visible.

De-energize the installation under test or wear suitable protective clothing when placing or

removing the flexible current probe from a test setup.

Do not apply/remove the flexible current probe to/from UNINSULATED HAZARDOUS LIVE

conductors that may cause electric shock, electric burn, or arc flash.

MA3110-en-GB_V1.0 12/16

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.

Safety Symbols that are typically marked on meters and instructions

Caution: Do not apply voltage or current to the input terminals or clamp that

exceeds the specified ranges

Caution: Risk of electric shock!

Equipment protected by double or reinforced insulation

Conforms to EU directives

Do not discard this product in household trash.

AC measurement

Earth ground

PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY

OVERVOLTAGE CATEGORY I

Equipment of OVERVOLTAGE 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.

MA3110-en-GB_V1.0 12/16

Description

Meter Description

1. Flexible Current Clamp

2. Clamp Lock Mechanism

3. 6000-count LCD Display

4. Power button

5. Data Hold Button

6. MODE (M) Button

7. Function Switch

8. COM (-) test lead input terminal

9. Positive (+) test lead terminal

Display Icons

H Data Hold

AUTO Automatic Range mode

AC Alternating Current

DC Direct Current

Low battery icon (flashing when measurements cannot be expected to be in-

specification)

Continuity alert (beeper)

V Unit for Voltage measurements

A Unit for Current measurements

Ω, KΩ, MΩUnits for Resistance measurements

nF, uF Units for Capacitance measurements

Diode measurements

OL ‘Overload’ for over range measurements (voltage, current and resistance)

- Minus symbol (negative) when the measurement value is negative

MA3110-en-GB_V1.0 12/16

Operation

NOTES: Read and understand all Warning and Caution statements in this operation manual

prior to using this meter.

Meter Power

The meter is powered by two (2) 1.5V ‘AAA’ batteries. The battery compartment is located on the

back of the meter. Press the Power button to switch the device ON or OFF.

Low battery indication

When the low battery icon appears ( ) the batteries should be replaced immediately,

although in-specification measurements can still be made temporarily. When the low battery

icon begins blinking, in-specification measurements are no longer supported and batteries must

be replaced before further measurements can be made. Refer to the battery replacement

procedure in the maintenance section.

Automatic Power OFF

The meter switches OFF automatically after a 15-minute period of inactivity. To disable the Auto

Power OFF feature:

With the meter power OFF, press and hold the Mode (M) button while powering the

meter ON.

The APO feature is now disabled and the meter will not shut off automatically.

Note that the next time the meter is powered up, the Auto Power OFF function will be

enabled again and the user will have to repeat the Auto Power OFF disable instructions

to disable this function when desired.

Data Hold

Press the H(HOLD) button with the meter ON to freeze the displayed reading. The Hicon will

appear along with the held reading. Press the H(HOLD) button again to release the HOLD feature.

The Hicon will switch OFF and the meter will show real time readings.

MA3110-en-GB_V1.0 12/16

DC and AC Voltage Measurements

WARNING: Use the test lead probe covers for CAT IV 600V installations. Do not measure

voltages greater than 1000V.

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

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

1. Connect the black test lead into the COM terminal.

2. Connect the red test lead into the ‘V’ terminal.

3. Power the meter using the power button .

4. Put the function switch to the ‘V’ position.

5. The display will show the ‘AUTO’ icon (Auto Range mode).

6. Press the M (MODE) button to select AC or DC voltage.

7. Press the test leads across the circuit under test and read the voltage on the display.

8. In the Auto Range mode, the meter will automatically select the optimal range. AC voltage

measurements are True RMS readings.

MA3110-en-GB_V1.0 12/16

AC Current Measurements

WARNING: Ensure that power to the device under test is OFF before starting this

procedure. Switch power to the device under test ON only after the clamp has been safely

attached to the device under test.

CAUTION: Do not move fingers above the LCD at any time during a test.

1. Switch the meter OFF and switch OFF power to the device under test.

2. Switch the meter ON and select ‘A’ with the function switch. The display will show the

automatic range icon (AUTO).

3. Turn the knurled clamp lock mechanism counter-

clockwise to release the flexible clamp.

4. Fully enclose only one conductor of the device under

test with the flexible clamp probe (see accompanying

diagrams). Do not attempt to measure current higher

than the specified current limit.

5. Re-lock the clamp turning the clamp lock clockwise.

6. Switch power to the device under test ON. Never move fingers above the LCD when

running a test.

7. Read the current value in the display. The meter will automatically select the appropriate

range (600.0A and 3000A).

MA3110-en-GB_V1.0 12/16

Resistance Measurements

CAUTION: Disconnect power to the circuit or device under test when making resistance

measurements

1. Connect the black test lead into the COM terminal.

2. Connect the red test lead into the ‘Ω’ terminal.

3. Power the meter using the power button .

4. Put the function switch to the ‘Ω’ position.

5. The display will show the ‘AUTO’ icon (Auto Range mode).

6. Press the M (Mode) button to select resistance Ω mode.

7. Press the test leads across the circuit under test and read the resistance on the display.

8. In the Auto Range mode, the meter will automatically select the optimal range.

MA3110-en-GB_V1.0 12/16

Continuity Measurements

CAUTION: Disconnect power to the circuit or device under test when making continuity

measurements

1. Connect the black test lead into the COM terminal.

2. Connect the red test lead into the ‘ohms’ terminal.

3. Power the meter using the power button .

4. Put the function switch to the ‘ohms’ position.

5. The display will show the ‘AUTO’ icon (Auto Range mode).

6. Press the M (Mode) button to select continuity mode.

7. The display will show “MANU” icon (Manual Range mode).

8. Press the test leads across the circuit under test. The meter will beep and the display will

show the continuity symbol when the resistance is < 20 ohms.

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