GTC LT800 User manual

1. SAFETY RULES
• This Instrument is designed for indoor use at temperatures be-
tween 0°C to 40°C and altitudes up to 2,000m.
• To ensure that the instrument is used safely, follow all safety and
operating instructions in this operation 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, exhoust manifolds, catalitic converters, etc.
2. INTERNATIONAL SYMBOLS
Important information refer to the
User’s Manual
CAUTION: Laser Radiation
AVOID DIRECT EYE EXPOSURE
1mW Output at 675nm
Class II Laser Product
3. TECHNICAL SPECIFICATIONS
3.1 General Specifications
Display: 3 digits LCD, max. of 999 display
with measuring units indicators,
Laser On indicator and backlight
Resolution: 1°C (1°F)
Operating Temperature: 32°F to 122°F (10°C to 52°C)
Response time: 1 second (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 at 675nm
Power Source: 9-volt battery type NEDA 1604,
IEC6F22
Battery life: Approx. 20 hours.(w/alkaline batteries)
Power Saving: Automatic shut off after 6 seconds
Wavelength: 8 to 14 micron
Dimensions: 6.7” x 1.7” x 1.6” (17 x 44 x 4 cm)
Weight: 5 oz. (140 g) with battery.
Accesories: User’s Manual, Soft Pouch, Hand
strap and 9 V alkaline battery
3.2 Measurement Specifications
• Accuracies are ±(% of reading + number of least significant dig-
its) at 23°C ±5°C ambient temperature, with less than 75% RH.
4. OPERATION
4.1 Instrument Description
1) Laser pointer output
2) IR Sensor
3) LCD Display
4) °C/°F Button
5) Backlight ON/OFF Button
6) ON/HOLD Button
7) LASER ON/OFF Button
8) Battery compartment cover
Function Range Acuracy Distance to targe to field of
view ratio
Temperature ºC
6ºC to 85ºC2.0%+2
8:1
-20ºC to 426ºC3.0%+3
Temperature ºF
68ºF to 212ºF 2.0%+2
-4ºF to 800ºF 3.0%+3
General Technologies Corp. LT800
Infrared Termometer with Laser Sight
2
8



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



















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

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4.2 Display Description

C

Digital
Readout
Laser sight
indicator
Celsius degrees
measurement
Fahrenheit degrees
measurement
4.3 Measurement Procedures
4.3.1 Field of view or measurement target area
 
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4.3.2 Temperature Measurement
• Point the IR Sensor to the area or object to measure, and press
the “ON/HOLD”.
• While the “ON/HOLD” button is kept pressed, the LT800 is
continuously measuring the temperature of the object pointed
at, with the IR Sensor.
• When the “ON/HOLD” button is released the instrument will hold
the last temperature reading for 6 seconds, and then shut off
automatically.
4.3.3 Selecting Temperature Units (°C/°F).
• Make sure the the instrument is turn ON, if not press the “ON/
OFF” button.
• Pressing the “°C/°F” button, will alternate the measuring units,
with the selected measurement unit shown on the display.

4.4 Other Functions
4.4.1 Display Hold
• The instrument will automatically hold the last temperature
reading after the “ON/HOLD” button has been released for
approx. 6 sec..
4.4.2 Display Backlight
• Make sure the the instrument is turn ON, if not press the “ON/
OFF” button.
• Pressing the “BACK LIGHT” button, will alternatibly turn ON
and OFF the display backlight.
• When the backlight is not necessary turn it off, in order to
prolong the 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, while
pressing on the “ON/HOLD”. The laser sight indicator will appear
on the display when the laser sight turn ON.
5. MAINTENANCE
5.1 Battery Replacement
• To replace the battery, remove the battery cover in the front of the
handle by sliding it down, and remove the battery.
• Replace with a new 9 V alkaline battery type NEDA 1604 or
IEC6F22 observing the proper polarity when connection to the
battery terminals.
• Reinstall the battery cover.
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 de-
tails see Standard Warranty Information in our webpage or request
a printed copy.
© Copyright 2001 General Technologies
General Technologies Corp.
#121 - 7350 72nd Street Tel.: [phone]
Delta, BC Fax: [phone]
Canada V4G 1H9 www.generaltechnologies.net