Operation
The Greenlee GT-12A is useful for identifying hot and neutral conductors,
finding a break in a wire, and detecting the presence of AC voltage at
outlets, switches, circuit breakers, fuses, and wires and cables, including
ROMEX
®
nonmetallic building electrical wire.
Note: Round cords may have twisted conductors. Check for hot
conductors by sliding the unit along the cord.
Note: The GT-12A can be used to find a break in a wire:
• To find a break in a hot conductor, trace the wire until the signal stops.
• To find a break in a neutral conductor, connect a load between the hot
and neutral. Trace the wire until the signal stops.
1. Turn the unit on by pushing down on the Smart ON/OFF button:
• Beeper Enable – Release the Smart button after the LED flashes
one time.
• Beeper Disable – Release the Smart button after the LED flashes
two times.
2. The GT-12A performs a self-test and a battery check every 2 seconds.
Before using the unit, verify that the LED is flashing periodically.
This indicates that both tests were successful.
• The unit will turn off automatically if the self-test fails. Do not use
the unit.
• The LED will remain on continuously if the batteries are low.
Replace the batteries as soon as possible.
3.
Test the unit on a known live circuit before each use.
• The LED will flash to indicate the presence of voltage (50 to
1000 VAC). The beeper will also sound unless it was disabled.
• If the unit does not function as expected on a known live circuit,
replace the batteries.
• If the unit still does not function as expected, call Greenlee for
technical assistance at 800-435-0786.
4. Place the tip on or near the circuit or unit to be tested. The LED will flash
to indicate the presence of voltage (50 to 1000 VAC). The beeper will
also sound unless it was disabled.
5. Test again on a known live circuit after use to verify proper operation.
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
Operating Conditions:
Temperature: -10 °C to 50 °C (14 °F to 122 °F)
Less than 80% relative humidity (noncondensing)
Altitude: 2000 m (6500’) maximum
Indoor use only.
Pollution Degree: 2
Battery: Two 1.5 volt batteries (AAA, NEDA 24A or IEC LR03)
Measurement Categories
This definition was derived from the international safety standard for
insulation coordination as it applies to measurement, control, and laboratory
equipment. These measurement categories are explained in more detail
by the International Electrotechnical Commission; refer to either of their
publications: IEC 61010-1 or IEC 60664.
Measurement Category IV:
Primary supply level. Overhead lines and other
cable systems. Some examples include cables, meters, transformers, and
other exterior equipment owned by the power utility.
Maintenance
Battery Replacement
1. Pull back on the battery door to slide it open and reveal the batteries.
2. Replace the batteries (observe polarity).
3. Line up the rails on the body and battery door. Slide the door forward
until it latches.
Cleaning
Periodically wipe the case with a damp cloth and mild detergent;
do not use abrasives or solvents.
Statement of Conformity
Greenlee Textron Inc. is certified in accordance with ISO 9001: 2008 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).
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 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 batteries or
make sure the battery is at full charge.
