USER GUIDE
3000A AC Flexible Clamp Adaptors
Models CA3010 and CA3018
Introduction
Thank you for choosing the Extech AC Flexible Clamp Adaptor that can measure up to 3000A AC.
A standard Digital MultiMeter (DMM) in mV AC mode can be used to display the current
measurement when the CA series Adaptor is connected to the DMM.
The CA3018 is the 18” (45.7cm) clamp version and the CA3010 is the 10” (25.4cm) clamp version,
otherwise both meters are the same. These devices are professional CAT IV 600V CAT III 1000V
instruments. This meter is shipped fully tested and calibrated and, with proper use, will provide
years of reliable service.
Features
3000A AC Current Measurements displayed on connected DMM
Convenient Flexible Clamp with locking mechanism
7.5mm (0.3”) coil diameter for measuring in tight spaces
Supplied banana plug cables
Power button
Battery status LED indicator
Current AC Range select switch 30A, 300A, 3000A
Battery powered
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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.
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.
Always use proper terminals, switch position, and range for measurements.
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 which 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
This symbol, adjacent to another symbol, indicates the user must refer to the
manual for further information.
Do not apply or remove clamp from HAZARDOUS LIVE conductors
Equipment protected by double or reinforced insulation
Battery symbol
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
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Flexible Current Clamp
Range selector
Power button
Banana Plug cable
Battery Compartment
Battery status indicator
Clamp Lock mechanism
Test Lead Banana Plugs
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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) AAA 1.5V batteries (located in compartment on bottom of meter
handle). Press the Power button momentarily to switch the device ON or OFF.
Battery status indication
The battery status indicator blinks slowly when the battery is fresh (> 2.5V). The indicator blinks
quickly when the battery is weakening (< 2.5V) and requires changing. Refer to the Maintenance
section for details on battery replacement.
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