Safety Information - Extech Instruments MA260 User Manual

Introduction
Thank you for selecting the Extech MA260 200A True RMS Open Jaw Clamp Meter. The MA260
incorporates Auto Sensing where the measurement type is automatically sensed and configured,
no need to turn a dial to select the measurement type or range. For AC Voltage, the Auto‐sense
feature also evaluates input signals and adjusts the Input Impedance to eliminate effects of ghost
voltages.
The MA260 measures AC current, AC/DC Voltage, Resistance, Continuity, and Diode and offers
extra‐large display digits, data hold, and a display backlight function. The non‐contact Volt‐
Detection feature senses electrical sources safely.
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.
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.

The time delay that results from the meter's automatic sensing circuit (1 to 2 seconds) may cause GFCI
circuits to reset and breakers to trip.

It is not recommended to use calibration equipment to test the MA260. Calibrators can be damaged if
used to test the MA260.

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.

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.

When using test leads or probes, please keep fingers behind the finger guards.

Remove test leads from the meter before opening the battery compartment or the meter case.

Use caution with voltages above 30VACrms, 42VAC peak, or 60VDC. These voltages pose a shock hazard.

Probe assemblies to be used for MAINS measurements must be rated as appropriate for measurement
Category III or IV according to IEC 61010‐031 and must have a voltage rating of at least the voltage of
the circuit to be measured.

Do not expose meter to extremes in temperature or high humidity.

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.
800.561.8187
2
www. .com
MA260‐en‐GB_V1.1 5/15
information@itm.com