General IRT102 Manuel utilisateur
Please read this manual carefully and thoroughly before using this product.
6:1 POCKET INFRARED
THERMOMETER
USER’S MANUAL
IRT102
IRT102 Manual 3-lang_FINAL2a-032614_awb 3/26/14 9:54 AM Page 1
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INTRODUCTION
The IRT102 is a small and lightweight non-contact
thermometer that measures the surface temperature of an
object from a distance by using an IR sensor to measure its
thermal radiation. A laser pointer indicates the target area
(spot) whose temperature is being measured.
SAFETY INSTRUCTIONS
The IRT102’s targeting laser is a Class 2 type that emits less
than 1mW of power at a wavelength of 655nm. Avoid direct
eye contact with laser light radiation. U.S. law prohibits
pointing a laser beam at aircraft; doing so is punishable by a
fine of up to $10,000 and imprisonment.
WHAT’S IN THE BLISTER ACK
The IRT102 comes in a plastic blister pack with two CR2032
batteries, a wrist strap and this user’s manual.
RODUCT OVERVIEW
Figure 1 shows the locations of the controls, indicators and
physical features of the IRT102.
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Fig. 1. The IRT102’s controls, in icators
an physical features
A. Meas. (measure) button B. Mo e button
C. Wrist strap attachment bar
D. Laser pointer E. IR sensor window
F. Liquid-crystal display
. Thermometer battery compartment
H. Laser battery compartment
I. Laser Identification/
Certification/Warning/
Safety Labels (on left side)
Fig. 2.
All possible isplay
in icators an
their meanings
A. Low Battery icon
B. Laser Enabled icon
C. Displaying highest measurement
D. Displaying lowest measurement
E. Operating in emissivity setting mode
F. Operating in measurement lock mode
. Celsius unit selected
H. Fahrenheit unit selected
I. Measured value
IRT102 Manual 3-lang_FINAL2a-032614_awb 3/26/14 9:54 AM Page 3
O ERATING INSTRUCTIONS
MAKING BASIC MEASUREMENTS
Point the front of the unit at a surface, press the Meas.
(measure) button, hold it for at least one second, and then
release. The temperature of the surface will be displayed
instantly on the LCD. Note that when you release Meas. the
reading will be held for 15 seconds and then disappear as the
IRT automatically powers off (to extend battery life).
By default, the laser pointer turns on when the Meas.
(measure) button is pressed and turns off when the button is
released. The laser’s current state is indicated by the
presence or absence of the Laser Enabled icon (callout B of
Fig. 2). To turn the laser off, hold down Mo e and Meas.
simultaneously while in the off position. The laser will reset to
its default (on) state when the unit is restarted.
To temperature-scan the surfaces of a room or any
environment, press Meas. and keep pressing it as you point
the IRT in various directions. Note that the display tracks the
different temperatures of different surfaces in real time.
To power off the IRT102, either press and hold the Mo e
button or let the auto power off function turn the IRT off after
15 seconds of inactivity.
ADVANCED MEASUREMENT MODES
AND FUNCTIONS
The Mo e button is the gateway to the IRT102’s five
advanced measurement and selection modes (see Figure 3).
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Press 1x
MAX
Press 2x
MIN
Press 3x
LOCK
Press 4x
°C/°F
Press 5x
Fig. 3. The Mo e button provides
access to the IRT102’s five advanced
measurement and selection modes
MAX - Displays the
maximum temperature
recorded during one
continuous measuring
session.
MIN - Displays the
minimum temperature
recorded during one
continuous measuring session.
LOCK - Measurement feature stays on without holding
Meas. and displays real time temperature readings. The
laser pointer automatically shuts off in this mode. (Note: The
Auto Power Off feature is disabled in this mode.)
°C/°F - Toggle between Fahrenheit and Celsius by pressing
the Meas. button.
- Press the Meas. button to choose the desired
emissivity level, then press Mo e to return to measurement
mode. Upon restart, the emissivity value will return to the
factory default of 0.95.
ACCOUNTING FOR EMISSIVITY
Emissivity is the ability of an object to reflect or absorb IR
radiation (energy). Because the IRT102 measures the amount
of infrared energy emitted by a surface, the IRT’s
measurements are most accurate when they take into
account the characteristic emissivity of the target material.
As a rule, the shinier the surface, the lower its emissivity.
The default emissivity setting of the IRT102 is 0.95.
The table on the next page lists the emissivities of many
common materials. 5
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Table 1. Emissivities of common materials
Material Emissivity Material Emissivity
Aluminum 0.30 lass 0.90 to 0.95
Asphalt 0.95 Iron Oxides 0.78 to 0.82
Concrete 0.95 Paint 0.80 to 0.95
Asbestos 0.95 Plastic 0.85 to 0.95
Ceramics 0.95 Paper 0.70 to 0.94
Brass 0.50 Plaster 0.80 to 0.90
Brick 0.90 Rubber 0.95
Carbon 0.85 Wood 0.90
Sludge 0.94 Textile 0.94
Frozen Food 0.90 Lead 0.50
Hot Food 0.93 Marble 0.94
Ice 0.98 Cloth (black) 0.98
Snow 0.90 Sand 0.90
Human Skin 0.98 Water 0.93
MAKING ACCURATE MEASUREMENTS
The IRT102 has a distance-to-spot (D:S) ratio of 6:1. This
means that the target area (spot) whose infrared radiation
(temperature) is being measured increases in diameter by
1 inch for every 6 inches you move away from the target.
Conversely, the diameter of the target area measured
decreases by 1 inch for every 6 inches you move closer to
the target.
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Fig. 4. The IRT102’s fiel of view
For example, when using the IRT102 to measure the
temperature of a motor with an area of 1 ft2, the optimal
measurement distance would be 6 ft. To eliminate error, the
IRT must be moved close enough so the motor is the only
object in the target area (see Fig. 5 bottom).
Fig. 5. Measuring a motor’s temperature from the wrong
(top) an right (bottom) istance.
S ECIFICATIONS
Measurement Range 5° to 428°F (-15° to 220°C)
Measurement Accuracy ±3.6°F (2°C) or 2% of reading
(whichever is greater) above 32°F
(0°C); ±5.4°F (3°C) or 2% of reading
(whichever is greater) below 32°F
Measurement Repeatability 1% of reading or 1°C
Distance-To-Spot (D:S) Ratio 6:1
Emissivity Adjustable from 0.1 to 1 in 0.01
increments (factory set to 0.95)
Response Time 500 msec for 95% response
Display Type/Size/Resolution LCD/1.0 x 0.8 in.
(25 x 19mm)/±0.1°C
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Laser Class/Power/Wavelength Class 2/<1mW/655nm
Response Wavelength 8 to 14 um
Auto Power Off After 15 seconds of inactivity
Thermometer Battery Life 50 hours, typical
Current Consumption <5mA w/laser off
Operating Temperature 32° to 104°F
(0° to 40°C)@<75% R.H.
Storage Temperature -4° to 140°F
(-20° to 60°C)@<85% R.H.
Dimensions 4.25 x 2.05 x 0.98 in.
(108 x 52 x 25mm)
Weight 1.41 oz. (40g)
Power Source Two CR2032 (3V) non-
rechargeable Lithium-ion cells
WARRANTY INFORMATION
In the U.S., eneral instruments and accessories are
warranted against defects in material or workmanship for one
year from date of purchase. eneral 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.
Any implied warranties arising from the sale of a eneral
product, including but not limited to implied warranties of
merchantability and fitness for a particular purpose, are
limited to the above. eneral 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.
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IRT102 Manual 3-lang_FINAL2a-032614_awb 3/26/14 9:54 AM Page 8
State laws vary. The above limitations or exclusions may not
apply to you.
We encourage our customers to register for warranty online.
eneral will extend your warranty an additional 60 days if you
register at www.generaltools.com/ProductRegistry.
RETURN FOR RE AIR OLICY
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 R A (Return oods Authorization)
number before forwarding the unit via prepaid freight to the
attention of our Service Center at this address:
eneral Tools & Instruments
80 White Street New York, NY 10013 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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6:1 THERMOMÈTRE
INFRAROUGE DE POCHE
MANUEL DE L’UTILISATEUR
IRT102
Veuillez lire attentivement tout le manuel avant d’utiliser ce produit.
IRT102 Manual 3-lang_FINAL2a-032614_awb 3/26/14 9:54 AM Page 10
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