General IRT205 User Manual

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Fig. 1. The IRT205’s key components

A. Red laser pointer exit

B. Infrared sensor

C. Measurement trigger

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IRT205

Please read these instructions carefully and thoroughly

before using the product.

INTRODUCTION

Thank you for purchasing General Tools & Instruments’
(General’s) IRT205 8:1 Infrared Thermometer. Using an optical
resolution (distance-to-spot ratio) of 8:1, the gun-style
instrument measures the surface temperature of a surface or
object from a distance by using an infrared (IR) sensor to
quantify its thermal radiation. This noncontact measurement
capability allows you to safely determine the temperature of
very hot or cold surfaces (from -4º to 536ºF/-20º to 280ºC),
inaccessible or hard-to-reach objects, and toxic substances.
A red laser pointer pinpoints the target area being measured.
Readings, in ºF or ºC, are displayed on a backlit LCD.

D. Battery compartment

(contains an ºF/ºC switch)

E. Backlit LCD (see Fig. 2)

F. Laser safety/identification/

warning label (closeup below)

Fig. 2. All possible display indications

A B C

E

F G

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WHAT’S IN THE PACKAGE

The IRT205 comes on a blister-packed card with two “AAA”
Alkaline batteries in a cavity on the back.

PRODUCT OVERVIEW

Fig. 1 shows the key components of the IRT205. Fig. 2 shows all
possible display icons and indications. Use Fig. 1 to familiarize
yourself with the position and function of all components before
moving on to the safety, setup and operating instructions.

A. Low battery charge indicator (replace both batteries when it

appears)
B. Laser pointer “on” icon (with trigger pulled)
C. Indicates that temperature readouts are in ºF
D. Indicates that temperature readouts are in ºC
E. Temperature readout
F. Indicates operation in scan mode (with the trigger squeezed)
G. Indicates last reading is being held (after the trigger has been

released)

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SAFETY INSTRUCTIONS

CAUTION!

• The IRT205’s Class II laser pointer emits less than 1mW of
radiation. However, avoid looking directly at the laser, and
never point it at people or animals. Eye protection is normally
afforded by the blink reflex.

• Do not operate the IRT205 in explosive environments
containing flammable liquids, gases or dust.

SETUP INSTRUCTIONS

INSTALL BATTERIES

The IRT205 is ready to use after you install the two included
“AAA” batteries. To open the battery compartment, place the tips
of your thumb and index finger in the cutouts on the side of the
compartment cover and pull to swing it down. Install the
batteries in series according to the polarity marks on the inside
of the compartment. Then swing the cover up and snap it shut.

OPERATING INSTRUCTIONS

To make a temperature measurement, squeeze the trigger
(Fig. 1, Callout C) to activate the laser pointer and aim it at a
target surface. This causes the word SCAN to appear on the
LCD, along with the temperature of the current target. Releasing
the trigger changes SCAN to HOLD and “freezes” the readout at
the temperature of the current target for seven seconds.
After seven seconds, the IRT205 (including the
laser pointer) automatically powers off to extend
battery life. The seven-second hold enables you to
take the temperature of surfaces you cannot see
(under or behind objects, for example) and then
read the display after returning the gun to eye level.

To change the displayed measurement unit
from ºF to ºC, open the battery compartment (as

described above), remove the batteries, and move
the switch inside the compartment from the
factory-set ºF position to the ºC position (see photo
at right). Then re-install the batteries and swing the
compartment door up until it snaps shut.

OPERATING &
MAINTENANCE TIPS

• The display will indicate OH if the temperature of a target is
above 536ºF (280ºC), and OL if its temperature is below -4ºF
(-20ºC).

• To avoid having old or unused batteries leak acid and ruin the
instrument, remove both batteries when you do not expect to
use the IRT205 for a long period of time (several months).

• Clean the infrared sensor lens (Fig. 1, Callout B) often with
compressed air or a moist cotton cloth. Never use a solvent or
an abrasive cleaner.

SPECIFICATIONS

• Measurement range: -4º to 536ºF (-20º to 280ºC)

• Measurement accuracy: ±3.6ºF (±2ºC) or ±2% of reading
(whichever is greater) above 32ºF (0ºC); ±5.4ºF (±3ºC) or ±2%
of reading (whichever is greater) below 32ºF (0ºC)

• Measurement resolution: 0.1º (F or C)
Distance-to-spot (D:S) ratio: 8:1

•

• Emissivity: 0.95 (fixed)

• Display: 4-digit backlit LCD measuring 1 x 7/8 in., with 7/16 in.

high digits

• Auto power off: 7 seconds after trigger release

• Laser output: <1mW (Class II) @ wavelength of 650nm

• Power source: Two “AAA” Alkaline batteries (included)

• Typical battery life: >3,000 measurements

• Operating temperature: 32º to 104ºF (0º to 40ºC)

• Storage temperature: 14º to 140ºF (-10º to 60ºC)

• Dimensions: 5 x 4 x 1.3 in. (128 x 102 x 32mm)

• Weight: 2.43 oz. (69g)

WARRANTY INFORMATION

General warrants its instruments and accessories, and digital
tools products against defects in material or workmanship for
one year from the date of purchase unless otherwise stated on
the packaging, user’s manual, and/or marketing materials.
General also warrants its non-digital tools products against
defects in material or workmanship on a limited lifetime term.

General will replace or repair the defective unit, at its option,
subject to verification of the defect.

This warranty does not apply to defects resulting from abuse,
neglect, accident, unauthorized repair, alteration, or
unreasonable use of the product. It also does not cover products
purchased from unauthorized distributors. A proof of purchase
must accompany each warranty claim.

Any implied warranties arising from the sale of a General
product, including but not limited to implied warranties of
merchantability and fitness for a particular purpose, are limited
to the above. General shall not be liable for loss of use of the
product or other incidental or consequential damages, expenses,
or economic loss, or for any claim of such damage, expenses,
or economic loss. State laws vary. The above limitations or
exclusions may not apply to you.

For more details or to file a warranty claim, contact General Tools
& Instruments Technical Support at
[e-mail].

RETURN FOR REPAIR POLICY

Every effort has been made to provide you with a reliable
product of superior quality. However, in the event your
instrument requires repair, please contact our Customer Service
to obtain an RGA (Return Goods Authorization) number before
forwarding the unit via prepaid freight to the attention of our
Service Center at this address:

General Tools & Instruments
75 Seaview Drive
Secaucus, NJ 07094
212-431-6100

Remember to include a copy of your proof of purchase, your
return address, and your phone number and/or e-mail address.

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