TM
NON-CONTACT VOLTAGE TESTER WITH INFRARED THERMOMETER
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59523
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s date code in the back of
the manual (or month and year of purchase if product has no number). Keep this manual and the receipt in a
safe and dry place for future reference. 25h
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-800-444-3353 as soon as possible.
Copyright
©
2025 by Harbor Freight Tools
®
. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product
described herein. Tools required for assembly and service may not be included.
Read this material before using this
product. Failure to do so can result in
serious injury. SAVE THIS MANuAL.
Page 2 For technical questions, please call 1-800-444-3353. Item 59523
Table of Contents
Safety ..........................................2
Setup ...........................................5
Operation ..................................... 6
Maintenance ................................ 7
Warranty ......................................8
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INFORMATION
Voltage Tester Warnings
Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result
in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
1. Electrical shock can cause death
or injury! NEVER TOUCH exposed
conductors of electricity.
2. Inspect the Voltage Tester before use.
3. Do not use the Voltage Tester if:
a. The test lead is damaged
in any way.
b. The battery is low.
c. Near any explosive
gasses or fumes.
d. Any abnormal operation is detected.
(If in doubt about the condition
of the Tester, have it serviced.)
e. The battery cover is open.
4. Do not install old and new batteries
together. Do not install alkaline,
carbon-zinc or rechargeable
batteries together. Position batteries
in proper polarity. Do not use
swollen or leaking batteries.
Page 3For technical questions, please call 1-800-444-3353.Item 59523
SAFETYOPERATIONMAINTENANCE SETuP
5. Use caution when working near
voltages above 30 VAC rms, 42 VAC
peak, or 60 VDC. Voltages this high
present a risk of electric shock.
6. Hold Voltage Tester with
fingers behind Safety Line.
7. Avoid electrical shock. Use extreme
caution when working near uninsulated
conductors or bus bars. Prevent body
contact with grounded surfaces such
as pipes, radiators, ranges, and cabinet
enclosures when testing voltages.
8. Observe work area conditions. Do
not test voltages in damp or wet
locations. Don’t expose to rain.
Keep work area clean and well lit.
9. Keep children away. Children must
never be allowed in the work area.
10. Stay alert. Watch what you are doing,
use common sense. Do not operate
Voltage Tester when you are tired.
11. Do not operate Voltage Tester if
under the influence of alcohol or
drugs. Read warning labels on
prescriptions to determine if your
judgment or reflexes are impaired while
taking drugs. If there is any doubt,
do not operate the Voltage Tester.
12. People with pacemakers should
consult their physician(s) before
use. Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference
or pacemaker failure.
13. Do not test voltage on circuits
higher than 1000V~. This type
of testing should only be done
by a qualified electrician.
14. Store idle equipment. When not
in use, Tester must be stored in a
dry location to decrease exposure
to moisture. Lock up Tester and
keep out of reach of children.
15. Dress properly. Protective,
electrically nonconductive
clothes and nonskid footwear are
recommended when working.
16. Wear ANSI-approved safety
goggles during use.
17. Avoid damaging Voltage Tester. Use
only as specified in this manual.
18. Performance of this Voltage Tester may
vary depending on battery condition.
19. Use the proper settings, terminals,
techniques, and range for the
tests performed. Start with the
range stated in the instructions.
Infrared Thermometer Warnings
1. Do not use for medical purposes.
2. Do not open the housing other
than battery compartment.
3. Avoid direct eye exposure.
4. Do not expose the tool to
rain or wet conditions.
5. Have your tool serviced by a qualified
repair person using only identical
replacement parts. This will ensure
that the safety of the tool is maintained.
6. Maintain labels and nameplates
on the tool. These carry important
safety information. If unreadable
or missing, contact Harbor Freight
Tools for a replacement.
Page 4 For technical questions, please call 1-800-444-3353. Item 59523
SAFETY OPERATION MAINTENANCESETuP
7. The warnings, precautions, and
instructions discussed in this instruction
manual cannot cover all possible
conditions and situations that may
occur. It must be understood by the
operator that common sense and
caution are factors which cannot
be built into this product, but must
be supplied by the operator.
SAVE THESE INSTRuCTIONS.
Specifications
Max. Voltage 1000V~
Rating CAT IV 1000V
Temperature Range -22°F to 536°F (-30°C to 280°C)
Temperature Accuracy (@ -22°F to 68°F) ±5.4°F
(@ 69°F to 536°F) ±2.0% or ±3.6°F, whichever is greater
Laser Type Class 1
Distance-to-Spot Ratio 4:1
Operating Temperature 32°F - 122°F (0° to 50° C)
Operating Humidity 80% RH Max.
Operating Altitude 2000m Max.
Storage Temperature 14°F to 140°F
Battery AAA x2 (included)
Page 5For technical questions, please call 1-800-444-3353.Item 59523
SAFETYOPERATIONMAINTENANCE SETuP
Setup - Before use:
Read the ENTIRE IMPORTANT SAFETY INFORMATION section
at the beginning of this manual including all text under
subheadings therein before set up or use of this product.
Functions
Laser
Detector Tip
NCV LED
Indicators
LED Display
IR
Button
NCV
Button
Battery
Cover
Infrared Sensor
Laser
Indicator
Low Battery
Warning
unit
Temperature
Reading
Safety Line
Page 6 For technical questions, please call 1-800-444-3353. Item 59523
SAFETY OPERATION MAINTENANCESETuP
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section
at the beginning of this manual including all text under
subheadings therein before set up or use of this product.
Non-Contact Voltage Mode
1. To turn on Tester in Non-
Contact Voltage Tester mode,
press the NCV Button.
2. If the Voltage Tester is working
properly, Tester will beep once
and the green LED will turn on.
3. If the Voltage Tester is not
working properly, the Tester will
beep and all LEDs will flash 5
times. Tester will then turn off.
a. Replace batteries. See “Battery
Replacement” on page 7.
b. Turn the Tester on. If Tester
still does not work, have Tester
serviced by a qualified technician.
4. Test a known live circuit to ensure
the Tester is operating correctly.
5. Place the Detector Tip near AC voltage.
6. If Tester detects voltage, the green
LED will turn off and the red LED
will flash. Tester will beep.
7. Flash rate and beeping rate will
increase as the Detector Tip
moves closer to voltage source.
8. If the Tester detects high voltage,
the red LED will stay on without
flashing. Tester will beep rapidly.
9. Tester will automatically turn off the
Non-Contact Voltage function after 5
minutes of inactivity. Tester will beep
twice and all LEDs will turn off.
Note: Detecting voltage during this five
minute window will reset the timer, keeping
the Tester on for another five minutes.
10. To manually turn off Tester, press
and the NCV Button. Tester will beep
twice and all LEDs will turn off.
Infrared Thermometer Mode
The object being tested should be larger than the size calculated by the diagram below.
16″
8″
4″
2″
Ø0.5″ Ø1″ Ø2″ Ø4″
Page 7For technical questions, please call 1-800-444-3353.Item 59523
SAFETYOPERATIONMAINTENANCE SETuP
1. Press and hold the IR Button. Laser
Indicator will show on LED Display.
2. To change the temperature unit
between Celsius and Fahrenheit,
press and hold the IR Button. While
pressing the IR Button, press and hold
the NCV Button. Release Buttons
when the desired unit is selected.
3. While holding the IR Button, aim the
Laser at the object to be measured.
4. The LED Display will show
the temperature.
NOTE: If the temperature is
outside measurable range, the
LED Display will show “OL.”
5. Releasing the IR Button will hold
reading for 10 seconds. The
Tester will automatically turn off
after 10 seconds of inactivity.
Silent Mode
1. To turn on Tester in Silent Mode,
press and hold the NCV button for 2
seconds. The Green Light will turn
on, but the Tester will not beep.
2. During operation, the LED will turn
red when detecting voltage. The
LED flash rate will increase at higher
voltages, but the Tester will not beep.
3. To turn off Tester, press the NCV button.
Maintenance and Servicing
Procedures not specifically explained in this manual
must be performed only by a qualified technician.
Cleaning, Maintenance, and Lubrication
1. Wipe unit with a dry, lint-free cloth.
Do not use solvents or abrasives.
2. Remove batteries if not in
use for long periods.
3. Store unit in a dry location.
4. Other than the battery, there
are no replaceable parts on this
unit. Repairs should be done
by a qualified technician.
Battery Replacement
1. Make sure Tester is off.
2. Unscrew Battery Cover
from end of Tester.
3. Remove used batteries and replace
with 2 new AAA batteries.
WARNING! To prevent serious injury:
Do not install old and new batteries
together. Do not install alkaline, carbon-
zinc or rechargeable batteries together.
Position batteries in proper polarity. Do
not use swollen or leaking batteries.
4. Replace Battery Cover and tighten.
3-YEAR LIMITED WARRANTY
This DOYLE product is warranted to the original purchaser to be free from defects in materials
and workmanship for a period of three (3) years beginning on the date of purchase. To obtain
warranty service, visit your local Harbor Freight retail store. Warranty registration is not required.
The product or part must be returned with proof of purchase (e.g. in-store receipt or packing slip/
invoice) and may require shipment by purchaser to a service center at purchaser’s expense.
If our inspection verifies a covered defect in materials or workmanship during the warranty
period, we will, at our option, repair or replace the defective product. We will return repaired
products within a reasonable time at our expense, but if we determine that there is no defect,
or that the defect resulted from causes not within the scope of our warranty, then we will return
the product to you if you pay return shipping costs. Fraudulent returns or claims will be denied.
The repair or replacement described in this warranty shall be your sole and exclusive remedy.
This warranty does not cover any failure or damage that
we determine is due directly or indirectly to:
• normal wear and tear, including, without limitation to, batteries, fuses, test leads,
thermocouples, and other wear items
• accident, misuse, abuse, rental, use not for the intended purpose, or use not in accordance
with the product manual
• modification, alteration, unauthorized repair, use of equipment or components we did not
supply, improper installation
• any other failure not arising from defective materials or workmanship
THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS WARRANTIES,
WRITTEN OR ORAL, AND ANY IMPLIED WARRANTIES ARE DISCLAIMED TO THE
EXTENT PERMITTED BY LAW AND OTHERWISE LIMITED TO THE DURATION OF THE
EXPRESS WARRANTY HEREIN. HARBOR FREIGHT SHALL NOT BE LIABLE UNDER
ANY CIRCUMSTANCES FOR ANY INCIDENTAL, INDIRECT, SPECIAL, CONSEQUENTIAL,
OR PUNITIVE DAMAGES OR COSTS ARISING FROM THIS WARRANTY OR THE
USE OF THIS PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW
LONG AN IMPLIED WARRANTY LASTS OR THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THESE LIMITATIONS MAY NOT
APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND
YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
26677 Agoura Road • Calabasas, CA 91302 • 1-800-444-3353
TM
Record Date Code Here:
Note: If product has no date code, record month and year of purchase instead.
Note: Reference UPC 193175473394.
