Infrared Digital Thermometers

Infrared thermometers are designed for applications requiring users to instantly measure temperature in

hard-to-reach areas

http://www.fluke.com/fluke/inen/products/Thermometers.htm

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

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

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

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 object 1” diameter - 12:1 optical resolution: 24” away from measured object 2” 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.

http://www.fluke.com/fluke/inen/products/Thermometers.htm

FIELD OF VIEW

- Field of view refers to the target size relative to the IR thermometer’s 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

http://www.fluke.com/fluke/inen/products/Thermometers.htm

HOW DOES IR THERMOMETER WORK

Infrared thermometers measure the surface

temperature of an opaque object

The thermometer’s optics sense emitted,

reflected, and transmitted energy, which is

collected and focused onto a Detector

The unit’s electronics translate the information

into a temperature reading which the unit

displays

http://www.fluke.com/fluke/inen/products/Thermometers.htm

IMPORTANT SPECIFICATIONS FOR SELECTION OF RIGHT IRTHERMOMETER

• Temperature range

• Measurement accuracy

• Distance to Spot Ratio

• Rugged & Reliable

• Response time

• Display resolution

• Battery life

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 unit’s 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

http://www.fluke.com/fluke/inen/products/Thermometers.htm

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

http://www.fluke.com/fluke/inen/products/Thermometers.htm

• 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

• Contact Number: 1 800 209 9110

Thank You