Introduction - Extech Instruments EX650 User Manual

1. Introduction
Thank you for selecting the Extech EX650 Series Clamp Meter.
The EX650 is a feature‐packed True RMS digital Clamp meter series with 6000 count backlit
display and automatic ranging.
Measure AC/DC voltage, AC current, DC current (EX655), Inrush current (EX655), Resistance,
Diode, Continuity, Capacitance, Temperature (EX655), Lo 'Z' low impedance mode, and
Frequency (EX655).
Other functions include Data Hold, Maximum/Minimum Memory, Relative mode, Low Pass Filter
(LPF) for Variable Frequency Drive signals (EX655), Work light, NCV (Non‐Contact Volt
Detection), and Auto power‐off.
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

6000 count digital display

60 segment analog bar graph display on EX655 model

Large backlit LED display

True RMS AC measurements

Lo Z mode eliminates ghost voltage readings on non‐energized circuits

Auto and Manual Range modes

0.5% DCV accuracy

Data Hold

Inrush current mode on EX655 model

Relative mode

Auto Power OFF (APO) with disable function

Temperature measurements (Model EX655 only) with included temperature probe

600A AC current measurements

600A DC Current Measurements on EX655 model

Non‐Contact Voltage Detector

Visual and audible continuity measurement alert

Low battery indicator

Includes test leads, Type‐K temperature probe (EX655), and three (3) 1.5V AAA batteries.

CAT III 600V / CAT II 1000V
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