Textron Greenlee CM-450 User Manual

INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
MANUEL D’INSTRUCTIONS
Read and understand all of the instructions and
safety information in this manual before operating or
servicing this tool.
Lea y entienda todas las instrucciones y la
información sobre seguridad que aparecen en este
manual, antes de manejar estas herramientas o darles
mantenimiento.
Lire attentivement et bien comprendre toutes les
instructions et les informations sur la sécurité de ce
manuel avant d’utiliser ou de procéder à l’entretien de
cet outil.
CM-450
Digital
Clamp-on
Meter
Medidor digital
con pinza
Contrôleur
numérique
à pince
52033586 REV 1 © 2008 Greenlee Textron Inc. 3/08
CM-450
TRUE RMS
www.calcert.com sales@calcert.com1.800.544.2843
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Textron Greenlee CM-450 Specifications

General

Model	CM-450
Manufacturer	Textron Greenlee
Category	Measuring Instruments
Display	Digital LCD
Type	Clamp Meter
Measurement Range	AC Current
Power Source	Battery
AC Current Range	0 to 400.0 A
Jaw Opening	1.25 inches (32 mm)

Summary

Safety

Important Safety Information

Safety Alert Symbol and Signal Words

Explains the safety alert symbol and signal word definitions (DANGER, WARNING, CAUTION).

General Safety Warnings

Emphasizes reading the manual and highlights electric shock hazards.

Operational Safety Hazards

Covers hazards like moisture, damage, EMI, and power handling.

Maintenance and Environmental Safety

Addresses safety during repair, extreme conditions, and function changes.

Using the Features

Selector Switch and Buttons

Details the operation of the selector switch and feature buttons like SELECT, Hz, HOLD, and REL.

AC Measurement Principles

Operation Instructions

Typical Measurements

AC Amps Measurement

Instructions for measuring AC current using the clamp jaw, with wire or line splitter.

Voltage Measurement

Accuracy Details

General Accuracy and Conditions

AC/DC Voltage & AC Current Accuracy

Resistance & Diode Tester Accuracy

Product Specifications

Measurement Category Definitions

Maintenance and Care

Unit Maintenance Precautions

Battery Replacement Procedure