General Tools IRT653 User Manual [en, es, fr]

INTRODUCTION:

Thank you for purchasing this Infrared Thermometer. This is a non-contact infrared temperature measuring instrument.
Features include a 4 digits backlit LCD, scan/hold/auto function and auto power off (6 seconds). To measure a temperature,
point the unit at the desired object, pull the measuring trigger and hold till the end of the shot. Make sure the target area is
larger than the unit’s spot size.

IRT653

USER’S MANUAL

12:1 Wide-Range Infrared Thermometer

with Memory & Alarm

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FEATURES:

• High performance for general purposes

• Emissivity adjustable from 0.1 to 1.00 in 0.01 steps

• Ultra low power consumption in shutdown mode

• Extended long time measuring reliability

• Laser sighting On/Off is switchable

• Backlit LCD display

• °F or °C selectable

• Electronic trigger lock

• Temperature data storage

• Audible alarms

APPLICATIONS:

• Manufacturing processes of semiconductor technology

• Automotive repair and maintenance

• Food safety and processing

• HVAC energy audits

• Electrical troubleshooting

• Testing terminals on circuits

• Scientific experiment

• Air conditioning

SAFETY INFORMATION:

Read the following safety information carefully before
attempting to operate or service the meter. Only qualified
personnel should perform repairs or services not covered in
this manual.

LASER WARNING NOTE!

Do not point laser directly at eyes.
Use caution around reflective surfaces.

Keep out of reach of children!

CAUTIONS!

• DO NOT submerge the unit in the water.

• This product is not designed for use in medical
evaluations.

The product can only be used to measure body temperature
for reference. It is meant for industrial and scientific
purposes.

SAFETY SYMBOLS

Dangerous, refer to this manual before using the
meter.

CE Certification

THIS INSTRUMENT CONFORMS TO THE FOLLOWING
STANDARDS:

EN61326: Electrical equipment for measurement, control and

laboratory use.

IEC61000-4-2: Electrostatic discharge immunity test.
IEC61000-4-3: Radiated, radio-frequency, Electromagnetic

field immunity test.

IEC61000-4-8: Power frequency magnetic field immunity

test.

Tests were conducted using a frequency range of
80-1000MHz with the instrument in three orientations.

The average error for the three orientations is ±1.0°F
(±0.5°C) at 3V/m throughout the spectrum. However,

between 781-1000MHz at 3V/m, the instrument may not
meet its stated accuracy.

The device may not be disposed in the trash. It

promotes the re-use recycling and other forms of
recovery of used materials and components, and to improve
the environmental performance of all operators
(manufacturers, traders, treatment facilities) involved in the
life cycle of products. Dispose of the product appropriately in
accordance with relevant regulations.

SPECIFICATIONS:

Distance/Spot Ratio: 12:1
Temperature Range: -25° to 999°F (-32° to 535°C)
Accuracy (@ ambient temperature of 77°F/25°C):

±5°F (±3°C) within -25° to -4°F (-32° to -20°C)
±3°F (±2°C) within -4° to 212°F (-20° to 100°C)

±2% within 212° to 999°F (100° to 535°C)
Thermopile: 5 ~ 14µm
Repeatability: ±2°F (±1°C)
Resolution: 0.1°F (0.1°C)
Response Time: 500 ms.

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Operating Temperature: 32° to 122°F (0° to 50°C), 10 to

90%RH
Auto Power Off: Automatically after approx. 6 seconds
Emissivity: Adjustable 0.1 ~ 1.0
°F/°C Switchable: YES
Backlight: YES
Laser Sight Switchable: YES
Audio Alarm: YES
Max/Min/Avg/ΔT: YES
Auto Measuring: YES
10 Point Memory: YES
Dimensions: 7.09" x 5.12" x1.57" (180 x 130 x 40mm)
Battery Type: “9V” battery
Battery Life: 16 hours
Weight: 6.6 oz. (187 g) Approx.
Accessory: “9V” battery, Instruction Manual,

Soft Carrying Case

OPERATIONS OF INSTRUMENT

QUICK START:

To measure a temperature, point the unit at the target that
you want to measure, pull the measuring trigger and hold. In
SCAN mode, the LCD displays either the current temperature
in Celsius or Fahrenheit. The unit will HOLD the last reading
for about 6 seconds after the trigger is released; the word
HOLD appears. Be sure to consider the target area that is
inside the angle of vision of this instrument. The single spot
of laser is used for aiming only.

LCD & CONTROL PANEL:

°F/°C AND BATTERY CHANGE:

The unit is powered by “9V” battery and displays
temperature in either °F/°C. The user has to replace the
battery when the battery voltage drops below the voltage for
reliable operation and at the same time the low battery

symbol will
appear. To change the
“9V” battery, pull and
open the unit’s handle
by using the finger.
Change the “9V”
battery with a new
one and push the
battery cover back

in place.

Display Screen

°F/°C switchable

Laser On/Off

“9V” battery

Laser
Sighting

Measuring
Window

Measuring
Trigger

Battery
and Cover

UNIT
DIAGRAM:

SCAN/HOLD/AUTO

mode indication

Laser On/Off

indication

Data

Max/Min/Avg/ΔT

indication

Down value

button

Function button

Data Memory
indication

°F/°C Indication
Temperature

indication
Low battery

Up value button

Emissivity/High

alarm/Low alarm

adjustable

indication

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OPERATION FUNCTIONS:

To operate the advanced functions of the unit, press the “F”
button to change the functions. The sequential operations
and the corresponding explanations are shown in the
following chart.

OPERATION REMARKS:

If you need to know more details of our tender
considerations for users on the operations, please read the
following contents.

• No matter if you push the measuring trigger or not,
when the unit’s power is on, you can change the
functions or adjust the parameters.

• To avoid dummy operations, the setup of functions can
be performed only after the unit wakes up by the
measuring trigger to make sure the correct operations.

• To avoid careless touch, some power management
designs have to be implemented.

• Auto function allows you to continuously measure the
target temperature and you don’t have to keep pulling
the measuring trigger all the time .

• Auto function can be only setup when both the
measuring trigger and the “F” function buttons are
pressed at the same time.

• The unit is totally powered off, there will be no more
standby current when storage. This will help the
battery last longer.

TECHNIQUES OF INFRARED THERMOMETER:

FIELD OF VIEW (FOV) RATIO =
DISTANCE TO DIAMETER (DS) RATIO

The field of view is the angle of vision at which the
instrument operates and it is determined by the optics of the
unit. The FOV is the
ratio of the distance
from the target to the
target diameter. The
smaller the target, the
closer you should be to
it. When the target
diameter is small, it is
important to bring the
thermometer closer to
the target to insure that
only the target is
measured, excluding
the surroundings.

Data Mode

Parameter
Setup Mode

• Scan and display the
temperature during
measurement

• Continuously measure and
display the temperature
without pulling the
measuring trigger

• Activate the data record
function when pulling the
trigger and recall the
stored data by using
▲ or ▼ button
(Note: While triggering to
record, the new data will
replace the existing data
on the next storage space.)

• The maximum temperature
within one shot measuring

• The minimum temperature
within one shot measuring

• The average temperature
within one shot measuring

• The highest and lowest
difference within one shot
measuring

• Adjustable emissivity for
more accuracy on all
surfaces

• Highest alarm temperature

• Lowest alarm temperature
(*The parameters are
adjusted by using
▲ and ▼ buttons)

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EMISSIVITY:

Emissivity is the ability of an object to omit or absorb energy.
Perfect emitters have an emissivity of 1, emitting 100% of
incident energy.

An object with an emissivity of 0.8 will absorb 80% and
reflect 20% of the incident energy. Emissivity is defined as
the ratio of the energy radiated by an object at a given
temperature to the energy emitted by a perfect radiator at
the same temperature. All values of emissivity fall between

0.0 and 1.0.
Non-contact temperature sensors measure IR energy emitted

by the target, have fast response, and are commonly used to
measure moving and intermittent targets, targets in a
vacuum, and targets that inaccessible due to hostile
environments, geometry limitations, or safety hazard.

The cost is relatively higher, although in some cases it is
comparable to contact devises.

MAINTENANCE:

Cleaning the lens: Blow off loose particles using clean
compressed air. Gently brush remaining debris away with a
camel’s hair brush. Carefully wipe the surface with a moist
cotton swab. The swab may be moistened with water.

NOTE: DO NOT use solvents to clean the lens.
CLEANING THE HOUSING: Use soap and water on a damp

sponge or soft cloth.

EMISSIVITY TABLE

Material Temp °F/°C Emissivity
Gold (pure highly polished) 227/440 0.02
Aluminum Foil 27/81 0.04
Aluminum Disc 27/81 0.18
Aluminum Household(flat) 23/73 0.01
Aluminum(polished prate 98.3%) 227/400 0.04

577/1070 0.06
Aluminum (rough plate) 26/78 0.06
Aluminum (oxidized @ 599°C) 199/390 0.11

599/1110 0.19
Aluminum surfaced roofing 38/100 0.22
Tin(bright tinned iron sheet) 25/77 0.04

Material Temp °F/°C Emissivity
Nickel wire 187/368 0.1
Lead (pure 99.95-unoxidized) 127/260 0.06
Copper 199/390 0.18

599/1110 0.19

Steel 199/390 0.52

599/1110 0.57
Zinc galvanized sheet iron (bright) 28/82 0.23
Brass (highly polished) 247/476 0.03
Brass (hard rolled-polished w/lines) 21/70 0.04
Iron galvanized (bright) - 0.13
Iron plate (completely) 20/68 0.69
Rolled sheet steel 21/71 0.66
Oxidized iron 100/212 0.74
Wrought iron 21/70 0.94
Molten iron 1299-1399/ 0.29

3270-2550
Copper (polished) 21-117/70-242 0.02
Copper (scraped shiny not mirrored) 22/72 0.07
Cooper (plate heavily oxidized) 25/77 0.78
Enamel (white fused on iron) 19/66 0.9
Formica 27/81 0.94
Frozen oil - 0.93
Brick (red-rough) 21/70 0.93
Brick (silica-unglazed rough) 1000/1832 0.8
Carbon (T-carbon 0.9% ash) 127/260 0.81
Concrete - 0.94
Glass (smooth) 22/72 0.94
Granite (polished) 21/70 0.85
Ice 0/32 0.97
Marble (light gray polished) 22/72 0.93
Asbestos board 23/74 0.96
Asbestos paper 38/100 0.93

371/700 0.95
Asphalt (paving) 4/39 0.97

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