Description; Safety; Purpose - Textron GREENLEE CMGRT-100A Instruction Manual

Description

The Greenlee CMGRT-100A Clamp-On Ground Resistance Tester is a hand-held testing device intended to
evaluate grounding systems. It has two modes:
• Standard Mode: Standard Loop Resistance & Leakage Current Measurements
• Advanced Mode: Refine Measurements to find Impedance at the Selected Frequency & to compute
Contact Voltage
Furthermore, it can also give an idea about the integrity of the ground systems, the quality of connections or
bonds within the system.
The tester can measure Loop Resistance in the range of 0.01 Ω to 1500 Ω as well as leakage current in the
range of 0.2 mA to 40A. It comes with a data storage function, that can log up to 300 measurements (Both
Ω and/or A). Furthermore, the meter also allows the user to select test frequency between 50, 60, 128,
or 2083 Hz.

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

This instruction manual is intended to familiarize all personnel with the safe operation and maintenance
procedures for the Greenlee CMGRT-100A Clamp-On Ground Resistance Tester.
Keep this manual available to all personnel.
Replacement manuals are available upon request at no charge.
Greenlee and
1.800.544.2843
are registered trademarks of Greenlee Textron.
Do not discard this product or throw away!
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
Textron Innovations Inc.
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