Greenlee GT-12A - User Manual

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INSTRUCTION MANUAL

GT-12A Voltage Detector

Description

The Greenlee GT-12A Voltage Detector is intended to check for the presence

of AC voltage, signaling the user with an intermittent tone and ﬂashing LED.

The tone can be disabled using the Smart ON/OFF button. The GT-12A has

a Self Test feature that continuously tests the integrity of the entire unit

including the antenna. The GT-12A also features low battery indication and

an auto power off feature.

This tool is protected by U.S. Patent No. 7,733,078 and Canadian Patent No.

2,607,922.

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 GT-12A

Voltage Detector.

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.

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.

ROMEX is a registered trademark of Southwire Company.

Symbols on the Unit

Warning—Read the instruction manual

Double insulation

Important Safety Information

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.

Electric shock hazard:

• Do not assume that no voltage indication means that the circuit

is de-energized.

• Follow the 3-point safety method as described in the “Operation”

section (steps 3, 4, and 5).

• Do not use the unit if it is wet or damaged.

• Do not apply more than the rated voltage between the tip and earth

ground.

• Do not operate with the case open.

• This tester will not detect voltage through metal conduit, on armored

or shielded cable, on sheathed nonmetallic cable that is saturated

with water, or at a distance such as through walls.

• Using this unit near equipment that generates electromagnetic

interference can result in unstable or inaccurate readings.

Failure to observe these warnings could result in severe injury or death.

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.

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Need help?

Do you have a question about the Greenlee GT-12A and is the answer not in the manual?

Summary

Description and Features

GT-12 A Voltage Detector Overview

Details the GT-12A Voltage Detector's intended use for checking AC voltage, signaling methods, and features like self-test and low battery indication.

Safety Information

General Safety Guidelines

Information for avoiding hazards and unsafe practices related to the use and maintenance of Greenlee tools and equipment.

Important Safety Warnings

Critical warnings regarding electric shock hazards, safe operating procedures, and potential consequences of misuse.

Operation Guide

Using the GT-12 A Voltage Detector

Instructions on turning the unit on, enabling/disabling the beeper, performing self-tests, and detecting voltage presence.

Technical Specifications

Measurement Categories Explained

Defines measurement categories for electrical test instruments based on international safety standards.

Maintenance and Support

Battery Replacement Procedure

Step-by-step guide for replacing the batteries in the GT-12A Voltage Detector.

Cleaning and Care

Instructions on how to properly clean the GT-12A Voltage Detector using mild detergent.

Statement of Conformity and Warranty

Details Greenlee's ISO certification and lifetime limited warranty for the product.

Summary

Description and Features

GT-12 A Voltage Detector Overview

Details the GT-12A Voltage Detector's intended use for checking AC voltage, signaling methods, and features like self-test and low battery indication.

Safety Information

General Safety Guidelines

Information for avoiding hazards and unsafe practices related to the use and maintenance of Greenlee tools and equipment.

Important Safety Warnings

Critical warnings regarding electric shock hazards, safe operating procedures, and potential consequences of misuse.

Operation Guide

Using the GT-12 A Voltage Detector

Instructions on turning the unit on, enabling/disabling the beeper, performing self-tests, and detecting voltage presence.

Technical Specifications

Measurement Categories Explained

Defines measurement categories for electrical test instruments based on international safety standards.

Maintenance and Support

Battery Replacement Procedure

Step-by-step guide for replacing the batteries in the GT-12A Voltage Detector.

Cleaning and Care

Instructions on how to properly clean the GT-12A Voltage Detector using mild detergent.

Statement of Conformity and Warranty

Details Greenlee's ISO certification and lifetime limited warranty for the product.

The Greenlee GT-12A Voltage Detector is a handheld instrument designed to check for the presence of AC voltage. It signals the user with an intermittent audible tone and a flashing LED indicator. The audible tone can be disabled using the "Smart ON/OFF" button.

Function Description:

The primary function of the GT-12A is to detect AC voltage. It is useful for identifying hot and neutral conductors, finding breaks in wires, and detecting the presence of AC voltage at various electrical points such as outlets, switches, circuit breakers, fuses, and wires and cables, including ROMEX® nonmetallic building electrical wire.

The device incorporates a self-test feature that continuously tests the integrity of the entire unit, including the antenna, every 2 seconds. This ensures the device is functioning correctly before use. It also includes a low battery indication, where the LED will remain on continuously if the batteries are low, prompting replacement. An auto power-off feature is also integrated to conserve battery life.

To find a break in a hot conductor, the user traces the wire until the signal stops. For a break in a neutral conductor, a load must be connected between the hot and neutral, and then the wire is traced until the signal stops.

Important Technical Specifications:

Indicators: LED and Tone
Voltage Range: 50 VAC to 1000 VAC
Frequency Range: 50 Hz to 500 Hz
Measurement Category: Category IV, 1000 V per UL 61010-1. This category signifies primary supply level, suitable for overhead lines and other cable systems, including cables, meters, transformers, and other exterior equipment owned by the power utility.
Operating Temperature: -10 °C to 50 °C (14 °F to 122 °F)
Humidity: Less than 80% relative humidity (noncondensing)
Altitude: 2000 m (6500') maximum
Use Environment: Indoor use only
Pollution Degree: 2
Battery: Two 1.5 volt batteries (AAA, NEDA 24A or IEC LR03)
Protection: The tool is protected by U.S. Patent No. 7,733,078 and Canadian Patent No. 2,607,922.

Usage Features:

Power On/Off: The unit is turned on by pushing down on the "Smart ON/OFF" button.
- Beeper Enable: Release the button after the LED flashes one time.
- Beeper Disable: Release the button after the LED flashes two times.
Self-Test and Battery Check: The GT-12A performs a self-test and a battery check every 2 seconds. Before use, the user must verify that the LED is flashing periodically, indicating successful tests. If the self-test fails, the unit will turn off automatically and should not be used. If batteries are low, the LED will remain on continuously, requiring immediate replacement.
Pre-Use Verification: Before each use, and after use, the unit must be tested on a known live circuit to verify proper operation. The LED should flash to indicate voltage presence (50 to 1000 VAC), and the beeper should sound (unless disabled). If the unit does not function as expected, batteries should be replaced. If the issue persists, technical assistance should be sought.
Detection: To detect voltage, the tip of the detector is placed on or near the circuit or unit to be tested.
Safety Precautions:
- Do not assume that no voltage indication means the circuit is de-energized. Always follow the 3-point safety method (test on known live circuit, test the circuit, test on known live circuit again).
- Do not use the unit if it is wet or damaged.
- Do not apply more than the rated voltage between the tip and earth ground.
- Do not operate with the case open.
- The tester may not detect voltage through metal conduit, on armored or shielded cable, on sheathed nonmetallic cable saturated with water, or through walls.
- Using the unit near equipment that generates electromagnetic interference can result in unstable or inaccurate readings.

Maintenance Features:

Battery Replacement:
1. Pull back on the battery door to slide it open and reveal the batteries.
2. Replace the batteries, observing polarity.
3. Line up the rails on the body and battery door, then slide the door forward until it latches.
Cleaning: Periodically wipe the case with a damp cloth and mild detergent. Abrasives or solvents should not be used.
Repair: The unit contains no user-serviceable parts, and users should not attempt to repair it.
Environmental Care: Do not expose the unit to extremes in temperature or high humidity.
Recycling: The manual explicitly states "Do not discard this product or throw away!" and directs users to www.greenlee.com for recycling information.

Warranty:

Greenlee Textron Inc. provides a Lifetime Limited Warranty to the original purchaser, ensuring products are free from defects in workmanship and material for their useful life, excluding normal wear and abuse. This warranty is subject to the terms and conditions of Greenlee Textron Inc.'s standard one-year limited warranty. For items not covered under warranty (e.g., dropped, abused), a repair cost quote is available upon request. Before returning any test instrument, users are advised to check replaceable batteries or ensure the battery is at full charge.