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Infrared Digital
Thermometers
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Infrared thermometers are designed for applications
requiring users to instantly measure temperature inhard-to-reach areas
http://www.fluke.com/fluke/inen/products/Thermometers.htm
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http://www.fluke.com/fluke/inen/products/Thermometers.htm
Temperature measurement
Contact Type Thermometers Uses temperature probes / thermo-couples
Highly accurate, good for Lab / calibration work
Non-Contact Thermometers Uses Infra Red beams to measure surface temperature
Moderate accuracy for day to day work
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http://www.fluke.com/fluke/inen/products/Thermometers.htm
Why IR thermometers - 3 main reasons
Safety From high temperature objects
From high voltages (temperature at circuit
breakers terminals, bus-bars)
Moving objects - Rotating motors, conveyors,
belts
Hard to Reach Object mounted at heights
Object mounted inside safety perimeter
Objects at hard to reach places
Convenience IR thermometer is easy to use
Just point-shoot-measure
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http://www.fluke.com/fluke/inen/products/Thermometers.htm
Emissivity
A numerical value between 0 and 1 which indicates the ability of an
object to emit infrared energy.
Emissivity is determined primarily by the material from which an
object is constructed and its surface finish.
Examples:
Polished brass: 0.03
Roughly polished copper: 0.07
Black lacquer paint: 0.96
Circuit boards
Important Parameters IR Thermometers
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http://www.fluke.com/fluke/inen/products/Thermometers.htm
Important Parameters IR Thermometers
DISTANCE TO SPOT RATION
Ratio of the distance from the measured object vs. sampling
spot size
EXAMPLES:
- 4:1 optical resolution: 4 away from measured object1
diameter
- 12:1 optical resolution: 24 away from measured object2
diameter
OBJECT SIZE
Know your application! An IR device with a 4:1 optical
resolution
can not effectively be used to measure a diffuser temperature
15 away.
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FIELD OF VIEW
- Field of view refers to the target size relative to the IR thermometers spot size .
- Ideally, the target surface to be measured should be twice the size of the spot .
- If the spot size is larger than the surface to be measured, measurement errors are
increased .
- Spot size calculator www.Fluke.Com
Important Parameters IR Thermometers
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HOW DOES IR THERMOMETER WORK
Infrared thermometers measure the surface
temperature of an opaque object
The thermometers optics sense emitted,
reflected, and transmitted energy, which is
collected and focused onto a Detector
The units electronics translate the information
into a temperature reading which the unit
displays
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IMPORTANT SPECIFICATIONSFOR SELECTION OF RIGHT IRTHERMOMETER
Temperature range
Measurement accuracy
Distance to Spot Ratio
Rugged & Reliable
Response time
Display resolution
Battery life
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OPERATING THE IR THERMOMETER
To measure temperature, point the thermometer at an object and pull the trigger.
Laser pointer to help aim the thermometer
To find a hot or cold spot, aim the thermometer outside the desired area.
As the distance from the object being measured increases, the spot size of the area
measured by the unit becomes larger
For accurate measurements, make sure that the target is larger than the units spot
size
The display retains its last infrared measurement for twenty seconds when the trigger
is released, with HOLD appearing on the display
The stored data can be downloaded to a personal computer (PC) via the
included USB cable and the included Fluke View Forms Documenting Software
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SAFETY PRECAUTIONS
Before using the thermometer inspect the case. Do not use the thermometer if it appears
damaged. Look for cracks or missing plastic. Pay particular attention to the insulation
around the connectors
Disconnect the thermocouple(s) from the thermometer before opening the case
Replace the batteries as soon as the battery indicator appears. The possibility of false
readings can lead to personal injury
Do not use the thermometer if it operates abnormally. Protection may be impaired. When
in doubt, have the thermometer serviced / calibrated at authorized labs.
Reflective objects result in lower than actual temperature measurements. These objects
pose a burn hazard
Do not operate the thermometer around explosive gas, vapor, or dust
http://www.fluke.com/fluke/inen/products/Thermometers.htm
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Company Name : Fluke Corporation - India
Website: http://www.fluke.com/fluke/inen/home/default.htm
Address: Division of DHR Holding India Pvt. Ltd.10th Floor, Sigma
Hiranandani Business Park, Powai
Mumbai, Maharashtra 400076
ContactNumber: 1 800 209 9110
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