NON CONTACT LASER
®
THERMOMETER
91778
ASSEMBLY INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at http://www.harborfreight.com
Copyright © 2004 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.
For technical questions and replacement parts, please call 1-800-444-3353
Specifications
Measurement Range
200 Celsius-2700 Celsius or
40 Fahrenheit-5180 Fahrenheit
Response Time
Resolution
Distance to Spot
Accuracy
Battery
Laser Class
Less than 1 Second
10 Celsius/Fahrenheit
8:1
±2%
9 V olt (included)
Class II Red Wave Length
Save This Manual
You will need the manual for the safety warnings and precautions,
assembly instructions, operating and maintenance procedures, parts list
and diagram. Keep your invoice with this manual. Write the invoice
number on the inside of the front cover. Keep the manual and invoice in
a safe and dry place for future reference.
Safety Warnings and Precautions
1. KEEP PRODUCT USAGE AREA CLEAN. Cluttered ar-
eas invite injuries.
2. KEEP CHILDREN AWAY FROM PRODUCT. This is not a
toy but a delicate/precision instrument. Do not allow
children to handle this product unsupervised.
3. TO AVOID RISK OF PERSONAL INJURY, EQUIPMENT
DAMAGE, FIRE AND SHOCK, make sure your work area
is free of damp, wet or rainy conditions.
4. USE EYE PROTECTION. NEVER POINT laser directly at
the eye. Do not point laser on or indirectly off of reflective
surfaces such as Stainless Steel or Aluminum, etc. Wear
ANSI approved safety impact goggles when working with
tools and equipment.
5. CHECK FOR DAMAGED PARTS. Before using this prod-
uct, carefully check that it will operate properly and perform
its intended function. Check for damaged parts and any
other conditions that may affect its operation. Replace or
repair damaged or worn parts immediately.
6. DO NOT DIRECT THE LASER BEAM INTO THE EYES of
any person or animal. This may cause serious injury to the
SKU 91778 For technical questions, please call 1-800-444-3353. Page 2
eye. Do not look directly into the beam during operation.
7. USE THE RIGHT TOOL FOR THE JOB. There are certain
applications for which this product was designed. Do not
modify this product and do not use this product for a purpose
for which it was not intended. Using this product for
purposes other than those specified, may result in
hazardous radiation exposure.
8. STAY ALERT. Watch what you are doing, use common
sense. Do not operate any tool when you are tired or
distracted from the job at hand.
9. CHECK FOR DAMAGED PARTS. Before using this
product, carefully check that it will operate properly and
perform its intended function. Check for damaged parts,
loose parts, and any other conditions that may affect the
operation of this product. Do not disassemble the instrument
or attempt to perform any internal servicing. Repair and
servicing of this Laser are to be performed only by a qualified
service technician.
10. DO NOT USE THIS THERMOMETER 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 use this product.
11. USE ONLY BATTERIES OF THE TYPE RECOMMENDED-
SIZE “9 VOLT” . Do not mix old and new batteries. Do not
use different types of batteries. Do not use rechargeable
and alkaline batteries together.
12. MAKE CERTAIN THE LASER BUTTON IS IN THE “OFF”
position when adjusting or when changing the battery.
13. REMOVE BATTERY if the Laser Thermometer is not used
for a long period of time.
14. DO NOT USE THIS PRODUCT IN THE FOLLOWING
FIELDS-EMF (electromagnetic fields), arc welder, etc.
15. ABRUPT TEMPERATURE CHANGE CAN CAUSE HEAT
SHOCK. If this occurs, allow 30 minutes for thermal stabilization before using again to prevent the possibility of inaccurate temperature readings.
16. PEOPLE WITH PACEMAKERS SHOULD CONSULT
THEIR PHYSICIAN(S) BEFORE USING THIS PRODUCT
FOR AUTOMOTIVE PURPOSES. Electromagnetic fields
SKU 91778 For technical questions, please call 1-800-444-3353. Page 3
in close proximity to a heart pacemaker could cause interference to or failure of the pacemaker. Caution is necessary when
near the coil, spark plug cables, or distributor of a running engine. The engine should always be off if adjustments are to be
made to the distributor.
Note: Always switch to a fresh set of battery when tool performance
begins to diminish. This is a delicate instrument. Do not drop or
jar the Thermometer.
Unpacking
When unpacking, check to make sure the following parts are included.
If any parts are missing or broken, please call Harbor Freight Tools at
the number on the cover of this manual
The Non Contact Laser Thermometer
With this Non Contact Thermometer, you can point, shoot, and read
the temperature at the location of the lazer beam. You can have
accurate target aiming and switch from Fahrenheit to Celsius for
instant temperature readings. Accuracy is +/- 2%. Response time is
less than 1 second. Just point, pull the trigger and read the temperature on the display.
This instrument is widely used in the home or work place for use in
the electric power industry, petrochemical industry, metallurgy
industry, auto industry, electron industr y, tobacco industr y, material
media industry, etc.
Electronic field:
point of an electric panel, fuse, dynamotor and gearbox, electronic
parts.
Heating and Air-Condition field:
leakage of pipe and air stratification. Can check the temperature in an
oven to see if it is accurate.
Automotive field:
radiator, etc.
Food field:
in accordance with HACCP standards. Cannot be used to see if
cooked meat is done.
For external use only:
people or animals. Will not take the place of a medical ther mometer.
SKU 91778 For technical questions, please call 1-800-444-3353. Page 4
This instrument can measure the heat radiation
Checks and monitors supply,
Check cylinder, heat system & cool system, scan
When foods are stored, measures surface temperatures
Not for measuring body temperature for
Operating the Infrared Thermometer
1. Squeeze the On/Off Key (E) on the pistol handle of the Laser
Thermometer. Align the unit directly facing the target. See Figure
6, page 7.
2. Press the Laser Key (10) while pressing the On/Off Key (E).
Point the IR Sensor (B) of the Laser directly at the target and the
temperature reading will appear on the LCD Display.
3. You may set the temperature to Fahrenheit (3) or Celsius (2) by
pressing the reading switch on the Indicator. See Figure 5, page 7.
4. When measuring temperature with the Laser, take into account the
ratio of distance and area to be measured.
5. When you release the On/Off Key (E), the last reading will be
held for 7 seconds. The HOLD (5) icon appears on the LCD
Display. See Figure 5, page 7.
6. If your battery is low, the screen will indicate “low battery”
(6). See Figure 5. At this time you will need to replace the
batteries. Dispose of old batteries. Contact local Hazard Waste
Disposal authorities for proper guidelines for disposal. See page 7.
7. To find a “hot spot”, aim the thermometer outside the area of
interest. Then scan across the object with an up and down motion
until you locate the “hot spot”.
8. To obtain accurate temperature readings, you must be sure the
distance from the target is correct. Determine the distance to be
measured. The farther the distance from the target, the larger
the hot spot size.
9. The smaller the object, the closer you should be to it. If you
want to get an accurate reading, you must be sure that the
laser reflection is twice as large as the object.
10. Use masking tape or flat black paint to cover surfaces such as
shiny or polished metal that has low emissive measurements.
Take into consideration the tape and allow more time for the
tape to get the same temperature as the material underneath
the tape.
11. Read the measured temperature. The Laser powers OFF
automatically after about 7 seconds when the On/Off Key (12)
is released.
SKU 91778 For technical questions, please call 1-800-444-3353. Page 5
Indicator
Lens
On/Off
Key
(E)
Figure 1
Figure 2
Replacing the Battery in the Laser Thermometer
1. Slide the Battery cover door on the handle to expose the Battery
compartment. See Figure 3.
2. Insert the replacement DC 9V Battery into the Battery compartment (F). DISPOSE OF OLD BATTERIES PROPERLY. Never put
batteries into a fire. Contact local Hazard Waste Disposal
authorities for proper guidelines. Replace cover. See Figure 4.
Battery
Battery
Cover
Figure 3
Figure 4
Maintenance
1. Clean the Lens (10) (See Figure 2) with a can of compressed air.
Gently brush remaining dust with a camel’s hair brush. Carefully
wipe the surface with a moist cotton swab moistened with water
or water based glass cleaner.
2. For better and safer performance, keep all parts of this product
clean and dry at all times
SKU 91778 For technical questions, please call 1-800-444-3353. Page 6
FEA TURE CALL OUTS
1. Digital Readout
2. Temperature 0C (Celsius)
3. Temperature 0F (Fahrenheit)
4. Measuring Indication
5. Data Hold
6. LOW Battery Indicator
7. Laser Point
8. Fixed Emissivity (0.95)
9. Backlit
10. Laser Key
11. Backlight Select Key
Lens
On/Off
Key (E)
Figure 2
Scan
4
5
6
10
7
Figure 5
IR
Sensor
(B)
Laser
Pointer
Beam
(7)
On/Off Key
(E)
Battery
Compartment
(F)
ε=0.95
2
Figure 6
8
1
Temperature
Reading
3
11
9
Warning: The warnings, cautions, and instructions discussed in
this instruction manual cannot cover all possible conditions and
situations that may occur. It must be under stood by the operator
that common sense and caution are factors which cannot be built
into this product, but must be supplied by the operator.
SKU 91778 For technical questions, please call 1-800-444-3353. Page 7
Parts List
Part # Description Qty.
Indicator (for details, see page 7)
A
IR Sensor
B
Laser Pointer Beam
C
LCD Display
D
On/Off Key
E
Battery Compartment
F
9 Volt Battery
G
1
1
1
1
1
1
1
Part B
Parts Identification
Part C
(not shown)
Part D
Part E
Part F
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE P AR TS DIAGRAM IN THIS
MANUAL AS A REFERENCE T OOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUT OR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR
SHE IS QUALIFIED T O MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR
DISTRIBUTOR EXPRESSLY STA TES THat ALL REPAIRS AND PARTS REPLA CEMENTS SHOULD
BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER.
THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO
THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS
OR HER INSTALLATION OF REPLACEMENT PA RTS THERETO.
SKU 91778 For technical questions, please call 1-800-444-3353. Page 8
Part A
Part G
(not shown)
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