User Manual InfraRed Thermometer With Laser Pointer and High/Low Alarms Model IR270 Additional User Manual Translations available at www.extech.
Introduction Thank you for selecting the Extech IR270 IR Thermometer. The IR270 makes non‐contact (infrared) surface temperature measurements and includes a laser pointer for convenient targeting. The meter switches ON and starts scanning surface temperatures as soon as you pull the trigger. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.
Description Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. Backlit multifunction LCD Laser/Backlight/Log button Up arrow button Secondary display mode button Laser pointer lens IR thermometer lens Down arrow button Trigger (pull and hold to scan surfaces) Battery compartment (9V) Display Description 1. Measurement Scan mode. The icon flashes while the trigger is pulled. The displayed reading represents the temperature of the scanned surface 2. Data hold mode. Reading is held after trigger is released 3.
Operation Meter Power One 9V battery powers the meter. Pull the meter trigger to switch the meter ON. If the meter does not switch ON, please check the battery (located in the meter handle); refer to the Maintenance section for more information. The battery icon provides battery status; replace the battery as soon as the battery icon flashes. The meter switches OFF seven seconds after you release the trigger (during the seven‐second period the last reading freezes on the display).
Distance to Spot Ratio (Field of View) The meter’s field of view is 12:1 (distance to spot ratio). For example, if the meter is 12 inches from the target (spot), the diameter of the target must be at least 1 inch. Refer to the field of view diagram printed on the meter and reproduced here. Measure surfaces from a maximum distance of 2 feet whenever possible.
Minimum Reading (MIN) Use the M button to step to the MIN parameter, then pull and hold the trigger to start scanning surface temperatures. The reading on the lower right represents the lowest reading recorded during the current measurement scan. When pressing M from a powered OFF condition, the value shown on the lower right is the lowest reading recorded during the last measurement scan performed.
Emissivity Adjust (EMS) Use the M button to step to the EMS parameter. Use the arrow buttons to set the desired emissivity value (shown on the upper right). The emissivity can be adjusted between 0.10~1.00. Refer to the Emissivity Considerations section for more information. Emissivity Considerations Emissivity represents the reflectivity of a material. For this meter, the emissivity can be adjusted from 0.10~1.00 (see Emissivity Adjust section above).
Maintenance Cleaning Use compressed air to clear dust and other particles from the meter lenses, and then carefully clean with a moistened (clean water) cotton swab. To clean the meter housing, wipe with a damp, soft cloth. Do not use solvents or abrasives. Do not immerse the IR270 in water or in other liquids.
Specifications Infrared Thermometer Specifications Range / Resolution Auto range ‐20 ~ 650oC (‐4 ~ 1202oF) / Resolution 0.1° Accuracy ‐20 ~ ‐2oC (‐4 ~ 28oF): ± 4°C (8°F) ‐2 ~ 94oC (28 ~ 200oF): ± 2.5°C (4.5°F) 94 ~ 204oC (200 ~ 400oF): ± (1.0%rdg + 1°C/2°F) 204 ~ 426oC (400 ~ 800oF): ± (1.5%rdg + 1°C/2°F) 426 ~ 650oC (800 ~ 1202oF): ± (3%rdg + 1°C/2°F) Note: Accuracy is specified for the following ambient temperature range: 23 ~ 25°C (73 ~ 77°F), <80%RH Emissivity 0.10 ~ 1.
