General Technologies LTX12 User Manual

General Technologies Corp.

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IR

MEASURE

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IR

HOLD

MEASURE

D

(D/10)

Spot

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
Class II Laser Product

630-670 nm

LTX12

Infrared Thermometer with Laser Sight

with ThermoSounder

4. OPERATION

4.1 Instrument Description

1) LCD Display

2) Backlight ON/OFF Button

3) °C/°F Select Button

4) ThermoSounder Button

5) LASER ON/OFF Button

6) IR Sensor

7) Laser pointer output

8) Measurement Trigger

9) Battery compartment cover

4.2 Display Description

3. TECHNICAL SPECIFICATIONS

3.1 General Specications

Display: 3½ digits LCD, Max. of 1999 display

with measuring units, laser on and
backlight indicators.

Resolution:
Operating Temperature:
Response time:

Target Size/ Field of View:

Repeatability:
Emissivity:
Laser Pointer:

Power Source: 9-volt battery type NEDA 1604,

Battery life: Approx. 20 hours (w/alkaline batteries)
Power Saving:

Wavelength:
Dimensions:
Weight:

Accessories: User’s manual, soft pouch, and 9 V

0.1 to 1 (°C or°F)
32°F to 122°F (0°C to 50°C)
<500 ms (approx.)
10:1 optics ratio with a 1” min. target

0.5% of reading, plus one digit
Fixed at 0.95
Laser Diode, < 1mW output

wavelength 630-670 nm, Class II

IEC6F22 IEC 6LR61

Automatic shut off after 7 seconds

7 to 14 µm

3.13”x 1.88”x 7.0” (80 x 48 x 178 mm)

7.6 oz. (215 g) including battery.

alkaline battery

Laser on

Backlight on

Low battery warning

Continuous measure
Display on hold

Temperature readout

°F scale selected

ThermoSounder on

°C scale selected
Measuring mode

4.3 Measurement Procedures

4.3.1 Temperature Measurement

Hold the instrument by its handle, point the IR Sensor at the area

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or object to measure, and press the Measurement Trigger.

While the Measurement Trigger is kept pressed, the instrument

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will continuously measure and update the display with the
temperature of the object pointed at with the IR Sensor.

After the Measurement Trigger is released the instrument will

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hold the last temperature reading for 7 seconds, then shut off
automatically.

4.3.2 Field of view or measurement target area

3.2 Measurement Specications

 Accuracies are ±(% of reading + number of least signicant

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digits) at 23°C ±3°C (73°F ± 6°F) ambient temperature, with less
than 75% relative humidity.

Function Range Accuracy (whichever is greater of) Resolution

Tem pe ra ture

Tem pe ra tu re

ºC

ºF

-30°C to 0°C

0°C to 199.9 ºC

200°C to 650°C 2.0% + 2 1°C

-22°F to 32°F

-32°F to 199.9 °F

200°F to 1200°F

1°C or 1.5%+2 (whichever is greater)

2°F or 1.5%+4 (whichever is greater)

± 2°C

± 4°F

2.0% + 2

0.1°C

0.1°F

1°F

To ensure accurate temperature measurements, make sure

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that the target object is larger than the unit spot size, at the
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 “°C /°F” button will switch between

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Fahrenheit Degrees as the temperature measurement units.

temperature reading and selected measurement units will be

The

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displayed on the LCD.

Celsius and

4.4 ThermoSounder

4.4.1 Introduction

The ThermoSounder is a feature of your LTX12 that facilitates nding

temperature variations or differentials (e.g. cold and hot spots)
quickly and easily by providing a sound that varies proportionally to
temperature differences.

4.4.2 Activating the ThermoSounder function

Make sure the instrument is turned ON, if not press the

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Measurement Trigger.

Pressing the “

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function.

The ThermoSounder indicator will display on the LCD when

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activated.

” button will turn on and off the ThermoSounder

4.4.3 Using the ThermoSounder function

Activate the ThermoSounder function as described in 4.4.2.

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Point at the area or object whose temperature you want to use as

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reference and press the Measurement Trigger.

The LTX12 will use the reference temperature to generate a

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‘reference’ beeping.

Higher temperatures (than the reference) will be indicated by a

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faster pace of beeping, the more the difference the faster the

pace of the beeping (i.e. pace is proportional to the temperature
difference).

Lower temperatures (than the reference) will be indicated by a

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slower pace of beeping, the more the difference the lower the

pace of beeping (i.e. pace is proportional to the temperature
difference).

The reference temperature for the ThermoSounder will be

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maintained as long the Measurement Trigger is pressed.

To choose a new reference temperature release the Measurement

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Trigger, then point at the area or object with the new temperature

you want to use as reference and press the Measurement
Trigger.

4.5 Other Functions

4.5.1 Display Hold

The instrument will automatically hold the last temperature

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reading after the Measurement Trigger has been released for
approximately 7 seconds.

4.5.2 Display Backlight

Make sure the instrument is turned ON, if it is not, press the

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Measurement Trigger.

Pressing the

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backlight ON or OFF.
When the backlight is not needed, turn it off to prolong battery

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life.

Backlight ON/OFF Button, will turn the display

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.

Pull to open
battery cover

Battery

To replace the battery, open the battery compartment cover

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(located at the front of the handle) by pulling on the nger 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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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 the loose particles
off with clean compressed air. Do not use solvent on the lenses, as

it may damage the instrument.

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 short circuits
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.

4.5.3 Laser Pointer

CAUTION: Laser Radiation is emitted

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.

Avoid direct eye contact

General Technologies Corp.

#121 - 7350 72nd Street Tel.: [phone]
Delta, BC Fax: [phone]
Canada V4G 1H9 www.gtc.ca

© Copyright 2008 General Technologies