User Manual Dual Laser InfraRed (IR) Thermometer MODEL 42512
Introduction Congratulations on your purchase of the Model 42512 IR Thermometer. This Infrared o thermometer measures and displays non-contact temperature readings up to 1832 F o (1000 C). At 30”, built-in dual lasers converge to 1” target spot to insure accurate targeting and temperature measurement. The adjustable emissivity feature allows the IR thermometer to measure the temperature of virtually any surface. Proper use and care of this meter will provide years of reliable service.
Meter Description 1. Dual Laser pointers 2. LCD Display 3. Function Buttons 4. Measurement Trigger 5. Battery and F/C Switch compartment DISPLAY 1. SCAN, measurement in progress 2. HOLD, last measurement locked in display 3. Laser pointer active 4. Power locked ON 5. High limit alarm 6. Low limit alarm 7. C or F temperature units 8. Main temperature display 9. Low battery icon 10. MAX icon 11. Emissivity setting 12. Emissivity icon 13. Max temperature display 3 42512 V7.
Operating Instructions Temperature Measurements 1. Hold the meter by its handle and point it toward the surface to be measured. 2. Pull and hold the trigger to turn the meter on and begin testing. The temperature reading, MAX temperature reading, the ‘SCAN’ icon, the emissivity value, and the unit of measure will appear. 3. Release the Trigger and the reading will hold for approximately 7 seconds (HOLD will appear on the LCD) after which the meter will automatically shut off.
MAX (maximum) temperature display The highest reading encountered during a single measurement scan is displayed in the MAX display Backlight 1. Press and release the Trigger 2. While HOLD is on the display, press the backlight button backlight on or off. once to turn on the 3. The backlight will illuminate in the LCD when the feature is enabled. 4. The status of the backlight will be stored in memory and will remain as the “turn-on” condition until changed. 5.
High and Low Alarm Feature The meter has a programmable high and low alarm feature. When either alarm point is reached the meter will alert the user via an audible beep and a blinking LCD display icon. The alarm limit is set and the feature is enabled/disabled using the MODE button. The setting is stored and memory and will remain as the “turn-on” condition until changed. Temperature Units The temperature units can be set to °F or °C using the switch located in the battery compartment.
IR Measurement Notes 1. The object under test should be larger than the spot (target) size calculated by the field of view diagram (printed on the side of the meter and in this guide). 2. Before measuring, be sure to clean surfaces that are covered with frost, oil, grime, etc. 3. If an object's surface is highly reflective, apply masking tape or flat black paint to the surface before measuring. Allow time for the paint or tape to adjust to the temperature of the surface it is covering. 4.
Emissivity and IR Measurement Theory IR Thermometers measure the surface temperature of an object. The thermometer’s optics sense emitted, reflected, and transmitted energy. The thermometer’s electronics translate the information into a temperature reading which is then displayed on the LCD. The amount of IR energy emitted by an object is proportional to an object's temperature and its ability to emit energy.
Specifications o o Range -58 to 1832 F (-50 to 1000 C) Resolution 0.1 < 1000 , 1 > 1000 Accuracy -58°F to -10°F(-50°C to -23°C) ±14°F/7°C (Typical) -10°F to 28°F(-23°C to -2°C) ±8°F/4°C 28°F to 200°F (-2°C to 94°C) ±4.5°F/2.5°C 200°F to 400°F (94°C to 204°C) ±(1.0%rdg + 2°F/1°C) 400°F to 800°F (204°C to 426°C) ±(1.5%rdg + 2°F/1°C) 800°F to 1832°F (426°C to 1000°C) ±(3%rdg +2°F/1°C) Note: Accuracy is specified for the following ambient temperature range: 73 to 77°F (23 to 25°C) Emissivity 0.10 to 1.
Calibration and Repair Services Extech offers repair and calibration services for the products we sell. Extech also provides NIST certification for most products. Call the Customer Service Department for information on calibration services available for this product. Extech recommends that annual calibrations be performed to verify meter performance and accuracy. Support line (781) 890-7440 Technical support: Extension 200; E-mail: support@extech.com Repair & Returns: Extension 210; E-mail: repair@extech.
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