Extech MA3110 User Manual

USER MANUAL

3000A TRUE RMS AC Flexible Clamp Meter

Model MA3110

Additional User Manual Translations available at www.extech.com

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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, 3

rd

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.

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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.

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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.

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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, MΩ Units 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