INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
MANUEL D’INSTRUCTIONS
CM-450
Digital
Clamp-on
Meter
Medidor digital
con pinza
Contrôleur
numérique
à pince
TRUE RMS
CM-450
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.
52033586 REV 1
© 2008 Greenlee Textron Inc.
3/08
Description
The Greenlee CM-450 Digital Clamp-on Meter is a hand-held testing device
capable of measuring up to 600 amps of alternating current, in addition to
measuring AC or DC voltage, frequency, and resistance. It also checks diodes and
verifies continuity. The CM-450 is a true RMS-reading meter.
Safety
Safety is essential in the use and maintenance of Greenlee tools and equipment.
This instruction manual and any markings on the tool provide information for
avoiding hazards and unsafe practices related to the use of this tool. Observe all
of the safety information provided.
Purpose of This Manual
This instruction manual is intended to familiarize all personnel with the safe
operation and maintenance procedures for the Greenlee CM-450 Digital Clamp-on
Meter.
Keep this manual available to all personnel.
Replacement manuals are available upon request at no charge at
www.greenlee.com.
Do not discard this product or throw away!
For recycling information, go to www.greenlee.com.
Lifetime Limited Warranty
Greenlee Textron Inc. warrants to the original purchaser of these goods for use
that these products will be free from defects in workmanship and material for
their useful life, excepting normal wear and abuse. This warranty is subject to
the same terms and conditions contained in Greenlee Textron Inc.’s standard
one-year limited warranty.
For all Test Instrument repairs, contact Customer Service at 800-435-0786
and request a Return Authorization.
For items not covered under warranty (such as items dropped, abused, etc.), a
repair cost quote is available upon request.
Note: Prior to returning any test instrument, please check replaceable
b
atteries or make sure the battery is at full charge.
All specifications are nominal and may change as design improvements occur.
Greenlee Textron Inc. shall not be liable for damages resulting from misapplication or misuse
of its products.
® Registered: The color green for electrical test instruments is a registered trademark of
Greenlee Textron Inc.
KEEP THIS MANUAL
CM-450
Important Safety Information
SAFETY ALERT SYMBOL
This symbol is used to call your attention to hazards or unsafe practices
which could result in an injury or property damage. The signal word, defined
below, indicates the severity of the hazard. The message after the signal
word provides information for preventing or avoiding the hazard.
Immediate hazards which, if not avoided, WILL result in severe injury or
death.
Hazards which, if not avoided, COULD result in severe injury or death.
Hazards or unsafe practices which, if not avoided, MAY result in injury or
property damage.
Read
and
understand
this material before operating or
servicing this equipment. Failure to understand how to
safely operate this tool could result in an accident causing
serious injury or death.
Electric shock hazard:
Contact with live circuits could result in severe injury or
death.
Important Safety Information
Electric shock and fire hazard:
• Do not expose this unit to rain or moisture.
• Do not use the unit if it is wet or damaged.
• Use test leads or accessories that are appropriate for the application. Refer
to the category and voltage rating of the test lead or accessory.
• Inspect the test leads or accessory before use. They must be clean and dry,
and the insulation must be in good condition.
• Use this unit for the manufacturer’s intended purpose only, as described in
this manual. Any other use can impair the protection provided by the unit.
Failure to observe these warnings could result in severe injury or death.
Electric shock hazard:
• Do not operate with the case open.
• Before opening the case, remove the test leads (or jaw) from the circuit and
shut off the unit.
Failure to observe these warnings could result in severe injury or death.
Electric shock hazard:
• Using this unit near equipment that generates electromagnetic interference
can result in unstable or inaccurate readings.
• Unless measuring voltage or current, shut off and lock out power. Make sure
that all capacitors are discharged. Voltage must not be present.
Failure to observe these warnings could result in severe injury or death.
CM-450
Important Safety Information
Electric shock hazard:
• Do not attempt to repair this unit. It contains no user-serviceable parts.
• Do not expose the unit to extremes in temperature or high humidity. Refer to
“Specifications.”
Failure to observe these precautions may result in injury and can damage the
unit.
Electric shock hazard:
Do not change the measurement function while the test leads are connected to
a component or circuit.
Failure to observe this precaution may result in injury and can damage the unit.
Statement of Conformity
Greenlee Textron Inc. is certified in accordance with ISO 9000 (2000) for our
Quality Management Systems.
The instrument enclosed has been checked and/or calibrated using equipment
that is traceable to the National Institute for Standards and Technology (NIST).
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