Extech Instruments 42545 User Manual

User’s Manual
High Temperature InfraRed Thermometer
with Laser Pointer
MODEL 42545
Introduction
Congratulations on your purchase of the Model 42545 IR Thermometer. The 42545 is
capable of non-contact (infrared) temperature measurements at the touch of a button. The
built-in laser pointer increases target accuracy while the backlit LCD and handy push-
buttons combine for convenient, ergonomic operation. Proper use and care of this meter
will provide years of reliable service.
42545

Extech Instruments 42545 Specifications

Infrared Thermometer Specifications

range	-58 to 1832°F (-50 to 1000°C)
resolution	0.1°C/F
accuracy	± (2% of reading + 9°F/4°C) <30°F (-1°C)
emissivity	Adjustable from 0.1 to 1.00 (0.95 default value)
field of view	D/S = Approx. 50:1 ratio
laser power	Less than 1mW (Class II)
spectral response	8 to 14 μm (wavelength)

General Specifications

display	4½ digit backlit LCD display with function indicators
display rate	1 second approx.
operating temperature	32°F to 122°F (0°C to 50°C)
operating humidity	Max. 90% RH
power supply	9V battery
automatic power off	Approx. 7 seconds after the trigger is released
weight	10.2 oz. / 290g
dimensions	3.9 x 2.2 x 9.0” (100 x 56 x 230mm)

Summary

Product Introduction and Operation

Introduction

Details the Model 42545 IR Thermometer's non-contact temperature measurement capabilities and ergonomic design.

Safety and Specifications

Safety Precautions

Advises extreme caution with laser pointer, avoiding eye exposure, and use away from explosive areas.

Infrared Thermometer Specifications

Lists temperature range, accuracy, emissivity, field of view, laser power, and spectral response.

General Specifications

Details display type, rate, operating temperature/humidity, power, auto-off, and weight/dimensions.

Meter Description and Usage

Meter Description

Identifies key components of the IR thermometer: laser pointer beam, IR sensor, trigger, display, and buttons.

Operating Instructions

Step-by-step guide on holding, powering, using the laser, selecting units, and activating backlight.

Measurement Notes

Provides guidance on target size, surface condition, reflectivity, transparent surfaces, and ambient temperature changes.

Advanced Measurement and Maintenance

Field of View

Explains the 50:1 field of view and provides a diagram illustrating spot size relative to distance.

Battery Replacement

Instructions on how to replace the 9V battery when the low battery symbol appears on the LCD.

Warranty and Services

Warranty

Details the one-year limited warranty, exclusions, and liability limitations for the instrument.

Calibration and Repair Services

Information on available repair, calibration, and NIST certification services offered by Extech.