U.S. General 66804 Installation manual

DIGITAL TEST LIGHT &
VOLTMETER
66804
SET UP AND OPERATING INSTRUCTIONS
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright©2009 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.
For technical questions or replacement parts, please call 1-800-444-3353.

SKU 66804 For technical questions, please call 1-800-444-3353. Page 2
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, inspection, maintenance and
cleaning procedures. Write the product’s
serial number in the back of the manual
near the assembly diagram (or month and
year of purchase if product has no num-
ber). Keep this manual and the receipt in
a safe and dry place for future reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling,
and all other information
provided with this product:
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.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING indicates
a hazardous
situation which, if not
avoided, could result in death
or serious injury.
CAUTION, used
with the safety alert
symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
General Safety Rules
WARNING Read all safety
warnings and instructions.
Failure to follow the warnings and
instructions may result in electric
shock, re and/or serious injury.
Save all warnings and
instructions for future
reference.
Electrical shock can cause death1.
or injury! NEVER TOUCH exposed
conductors of electricity.
Inspect the Test Light/Voltmeter2.
before use. In addition to a general
inspection be sure to:
Pay special attention to the insula-a.
tion protecting the connectors.
Check the leads for exposed metal,b.
damaged insulation, and continuity.
Replace damaged test lead imme-c.
diately before use or storage
Do not use the Test Light/Voltmeter if:3.
The test lead is damaged in anya.
way.
Near any explosive gasses orb.
fumes.
Any abnormal operation is de-c.
tected.
Use caution when working near volt-4.
ages above 48 VDC. Voltages this
high present a risk of electric shock.
Connect in parallel with circuit.5.

SKU 66804 For technical questions, please call 1-800-444-3353. Page 3
Do not use on high-impedence cir-6.
cuitry.
Hold the probes with ngers behind 7.
guards.
Observe work area conditions. Do not8.
test voltages in damp or wet locations.
Don’t expose to rain. Keep work area
clean and well lit.
Keep children away. Children must9.
never be allowed in the work area.
Stay alert. Watch what you are doing,10.
use common sense. Do not operate
any voltmeter when you are tired.
Do not operate Test Light/Voltmeter if11.
under the inuence of alcohol, medi-
cation, or drugs. Read warning labels
on prescriptions to determine if your
judgment or reexes are impaired
while taking drugs. If there is any
doubt, do not operate the Voltmeter.
WARNING: The brass components of12.
this product contain lead, a chemical
known to the State of California to
cause birth defects (or other repro-
ductive harm). (California Health &
Safety code § 25249.5, et seq.)
Store idle equipment. When not in13.
use, Test Light/Voltmeter must be
stored in a dry location. Lock up the
tool and keep out of reach of children.
Dress properly. Protective, electrically14.
nonconductive clothes and nonskid
footwear are recommended when
working. Remove any metal items
such as jewelry before working with
electricity.
Wear ANSI-approved impact safety15.
goggles.
Only use accessories supplied with16.
this meter.
The warnings, cautions, and instruc-17.
tions discussed in this instruction
manual cannot cover all possible con-
ditions 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.
Avoid damaging the Test Light/Volt-18.
meter. Use only as specied in this
manual.
Have the Test Light/Voltmeter cali-19.
brated by a qualied technician every
year. A voltmeter that is not calibrated
yearly will not yield accurate results.
SAVE THESE
INSTRUCTIONS.

SKU 66804 For technical questions, please call 1-800-444-3353. Page 4
SPECIFICATIONS
Voltage Ranges: 3-48VDC
Accessories 2 probes, 2 clamps,
adaptor
Note: This tool should only be used with
DC voltage systems less than or
equal to 48V.
UNPACKING
When unpacking, check to make
sure that the item is intact and undam-
aged. If any parts are missing or broken,
please call Harbor Freight Tools at the
number shown on the cover of this manual
as soon as possible.
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.
Tool Set up
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
ELECTRICAL SHOCK CAN
CAUSE DEATH OR INJURY.
AVOID TOUCHING EXPOSED
CONDUCTORS OF
ELECTRICITY.
Long Needle Probe
Short Needle
Probe
Negative Charge Clip
Alligator Clamp
with Rubber
Sleeve
Alligator Clamp with
Plastic Frame
Adaptor
Handle
Cord
Figure 1
Choose which attachment is best suited
for the task and attach it to the brass tube
on the end of the Handle. Possible con-
gurations are:
Thread either one of the Needle•
Probes into the socket of the
handle. Remove the protective cap
from the pointed end of the Probe.
Thread the Long Needle Probe into•
the socket of the handle. Remove
the protective cap from the pointed
end of the Probe and insert the
Probe into the socket of the Alliga-
tor Clamp with the Rubber Sleeve.
Push it in until it is secure.
Attach the Adaptor to the socket of•
the handle by pushing it all the way
in. Attach the Alligator Clamp with
the Plastic Frame to the Adaptor.
General Operating Instruction
Do not test voltage on DC circuits
higher than 48 volts.
Attach the Negative Charge Clip to a1.
good ground.

SKU 66804 For technical questions, please call 1-800-444-3353. Page 5
Touch the Probe or attach the Alligator2.
Clamp on the handle to the positive
end of the component you are testing.
The LCD will light up, then the volt-•
age level will display on the LCD.
Read the voltage on the LCD display3.
on the Handle.
If the voltage is lower than 3 volts,•
the LCD will light up but no reading
will display.
 Proceduresnotspecically
explained in this manual must
beperformedonlybyaqualied
technician.
CLEANING, MAINTENANCE,
AND LUBRICATION
BEFORE EACH USE,1. inspect the
general condition of the Voltmeter.
Check for cracked or broken parts,
damaged electrical wiring, and any
other condition that may affect its safe
operation.
AFTER USE,2. clean external surfaces
of the tool with clean cloth.

SKU 66804 For technical questions, please call 1-800-444-3353. Page 6
LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet
high quality and durability standards, and warrants to the original purchaser that this
product is free from defects in materials and workmanship for the period of 90 days
from the date of purchase. This warranty does not apply to damage due directly or
indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside
our facilities, criminal activity, improper installation, normal wear and tear, or to lack of
maintenance. We shall in no event be liable for death, injuries to persons or property,
or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or con-
sequential damages, so the above limitation of exclusion may not apply to you. THIS
WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us
with transportation charges prepaid. Proof of purchase date and an explanation of the
complaint must accompany the merchandise. If our inspection veries the defect, we
will either repair or replace the product at our election or we may elect to refund the
purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that
the defect resulted from causes not within the scope of our warranty, then you must
bear the cost of returning the product.
This warranty gives you specic legal rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • [phone]