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EXTECH Infrared Thermometer with Laser Pointer Model 42545 User Guide and Owner's Manual

Summary

This professional Infrared Thermometer provides accurate, non-contact temperature measurements using advanced IR technology and a built-in laser pointer for improved accuracy. This comprehensive guide teaches intuitive usage, covering everything from basic operation to advanced functionalities like setting High/Low alarms, calculating averages (AVG), and adjusting emissivity. It is the essential tool for technicians, industrial personnel, and quality control specialists requiring reliable temperature data across varied professional applications.

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User’s Manual

High Temperature Infra Red Thermometer with Laser Pointer

MODEL 42545

Page Summary Contents For EXTECH Infrared Thermometer with Laser Pointer Model 42545 User Guide and Owner's Manual

Page 1 User’s Manual High Temperature Infra Red Thermometer with Laser Pointer MODEL 42545
Page 2 Introduction Congratulations on your purchase of the Model 42545A IR Thermometer. The 42545A is capable of non-contact (infrared) temperature measurements at the touch of a button. The built-in laser ...
Page 3 Operating Instructions Basic IR 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 te...
Page 4 The MODE button options The MODE button is used to access the programming functions of the instrument. The selected function is displayed on the bottom line of the LCD. Each parameter is listed below ...
Page 5 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 measu...
Page 6 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 electron...
Page 7 Specifications Infrared Thermometer Specifications Range / Resolution -58 to 1832o F (-50 to 1000o C) 0.1o C/F Accuracy ± (2% of reading + 9°F/4°C) <30°F (-1°C) (of reading) ± (2% of reading + 4°F/...

Manual Details

Brand Laser
Pages 7
File Size 149.95 KB
Published May 29, 2026
44 views

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Frequently Asked Questions

What should I use if unsure about emissivity?

Set the emissivity to 0.95, as this setting covers most applications.

How do I program a specific temperature alarm?

Press MODE button until HAL or LAL is displayed, then use UP/DOWN arrow keys to set the desired temperature.

What does the 'DIF' mode calculate?

It displays the difference between the maximum (MAX) and minimum (MIN) readings taken during the current session.

How long will the meter run after I release the trigger?

The reading will hold for approximately 7 seconds, after which the unit automatically shuts off.