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