General Technologies LT102 User Manual
General Technologies Corp.
Laser On Indicator
Emissivity Coeficient
°C Scale Selected
°F Scale Selected
Display Hold Mode
Continuous Scan Mode
Temperature Readout
Low Battery Warning
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LT102
Infrared Thermometer with Laser Sight
1. SAFETY RULES
This Instrument is designed for indoor use at temperatures
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between 32°F to 122°F (0°C to 50°C), altitudes up to 6500 ft.
(2,000 m), and 10% to 90% relative humidity.
To ensure that the instrument is used safely, follow all safety and
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operating instructions in this manual. If the instrument is not used
as described in this operation manual, the safety features of this
device might be impaired.
• To avoid personal injuries and damage to the instrument use ex-
treme caution when working around hot machine or engine parts,
like radiators, exhaust manifolds, catalytic converters, etc.
2. INTERNATIONAL SYMBOLS
Important information
Refer to the User’s Manual
CAUTION: Laser Radiation
AVOID DIRECT EYE EXPOSURE
1mW Output at 630-670 nm
Class II Laser Product
3. TECHNICAL SPECIFICATIONS
3.1 General Specifications
Display: 3 digits LCD, Max. of 1999 display
with measuring unit indicators, Laser
On indicator and backlight
Resolution: 0.1 to 1 (°C or 1°F)
Operating Temperature: 32°F to 122°F (0°C to 50°C)
Response time: 400 mS (approx.)
Target Size/ Field of View: 8:1 optics ratio with a 1” min. target
Repeatability: 0.5% of reading, plus one digit
Emissivity: Fixed at 0.95
Laser Pointer: Laser Diode, < 1mW output
Power Source: 9-volt battery type NEDA 1604,
Battery life: Approx. 20 hours.(w/alkaline batteries)
Power Saving: Automatic shut off after 7 seconds
Wavelength: 6 to 14 µm
Dimensions: 3.2”x 1.6”x 6.3” (82x 41.5 x160 mm)
Weight: 6.5 oz. (180 g) with battery.
Accessories: User’s Manual, Soft Pouch, and 9 V
wavelength 630-670 nm, Class II
IEC6F22 IEC 6LR61
alkaline battery
4. OPERATION
4.1 Instrument Description
1) Laser pointer
2) IR Sensor
3) LCD Display
4) °F Select Button
5) °C Select Button
6) Backlight ON/OFF Button
7) LASER ON/OFF Button
8) Measurement Trigger
9) Battery compartment cover
4.2 Display Description
4.3 Measurement Procedures
4.3.1 Temperature Measurement
Hold the instrument by its handle, point the IR Sensor to the
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area or object to measure, and press the Measurement Trigger.
While the Measurement Trigger is kept pressed, the
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thermometer is continuously measuring the temperature of the
object pointed at, with the IR Sensor.
When the Measurement Trigger is released the instrument will
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hold the last temperature reading for 7 seconds, and then shut
off automatically.
4.3.2 Field of view or measurement target area
3.2 Measurement Specifications
Accuracies are ±(% of reading + number of least significant dig-
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its) at 23°C ±5°C ambient temperature, with less than 75% RH.
Function Range Accuracy Resolution
Temperature ºC
Temperature ºF
-50°C to -20°C 5.0%
-20°C to 200ºC
201°C to 538°C 2.0%+2 1°C
-58°F to -4°F
-4°F to 200°F
201°F to 1000°F
2.0%+2
9.0%
2.0%+4
2.0%+4
0.1°C
0.1°F
1°F
To take the most accurate temperature measurements, make
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sure that the target object is larger than the unit spot size, at any
given measuring distance.
The smaller the target the closer you should be.
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For maximum accuracy make sure that the target area is at
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least twice as large as the spot size.
4.3.3 Selecting Temperature Units (°C/°F).
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Make sure the instrument is turned ON, if not press the
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Measurement Trigger.
Pressing the “°F” button will select Fahrenheit Degrees as the
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temperature measurement units.
Pressing the “°C” button will select Celsius Degrees as the
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temperature measurement units.
Temperature reading and measurement units will display
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on the LCD.
4.4 Other Functions
4.4.1 Display Hold
The instrument will automatically hold the last temperature
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reading after the Measurement Trigger has been released for
approx. 7 sec.
4.4.2 Display Backlight
Make sure the instrument is turned ON, if not press the
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Measurement Trigger.
Pressing the Backlight ON/OFF Button, will turn the display
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backlight ON or OFF.
When the backlight is not needed, turn it off to prolong
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battery life.
4.4.3 Laser Pointer
CAUTION: Laser Radiation is emitted
Avoid direct eye contact
To turn the laser sight ON or OFF, press the “LASER” button,
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when the unit is ON. The laser sight indicator will appear on the
display when the laser sight function is ON.
Note: In order to prevent injuries from an unexpected laser beam
when the instrument is turned ON, every time the unit is turned ON
by pressing the Measurement Trigger, the laser pointer is turned
OFF, and if needed should be turned ON as explained above.
5.2 Cleaning
5.2.1 Lens cleaning
Debris or dirt on the lens may cause obstruction and reduce the
accuracy of the thermometer. If this occurs, either wipe the lens
with a Q-tip (moistened with water only) or blow off the loose
particles with clean compressed air. Do not use solvent on the
lenses, as it may become damage.
5.2.2 Exterior cleaning
Periodically wipe the case with a soft damp cloth and mild household
cleanser. Do not use abrasives or solvents. Ensure that no water gets
inside the instrument to prevent possible shorts and damage.
6. WARRANTY
One year limited warranty, excluding batteries and fuses. For
details see Standard Warranty Information on our web page or you
may request a printed copy.
5. MAINTENANCE
5.1 Battery Replacement
When the battery is low and needs to be replaced, the “Low Bat-
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tery Warning” symbol will appear on the lower left hand side of
the display.
To replace the battery, open the battery compartment cover
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(located at the front of the handle) by pulling on the finger indents
near the trigger, and remove the battery.
Replace with a new 9 V alkaline battery type NEDA 1604 or
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IEC6F22 observing the proper polarity when connecting to the
battery terminals.
Close the battery cover.
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General Technologies Corp.
#121 - 7350 72nd Street Tel.: (604) 952-6699
Delta, BC Fax: (604) 952-6690
Canada V4G 1H9 www.generaltechnologies.net
© Copyright 2004 General Technologies
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