User`s Manual - Forestry Suppliers, Inc.
Contents
1. 2 C 30 F to 800 1 C to 426 C 2 5 of reading 6 F 3 C 800 to 1000 F 426 to 537 C 3 of reading 9 F 4 C gt 1000 F 537 C i Note Accuracy is specified for the following ambient temperature range 64 to 82 F 18 to 28 C Emissivity Adjustable from 0 1 to 1 00 0 95 default value Field of View D S Approx 50 1 ratio D distance S spot Laser power Less than 1mW Class I Spectral response 8 to 14 um wavelength General Specifications 2 Display 4 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 Safety compliance CE Weight 10 2 oz 290g Dimensions 3 9 x 2 2 x 9 0 100 x 56 x 230mm T Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website www extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451 Copyright 2008 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in a2. User s Manual EXTE INSTRUMENTS High Temperature InfraRed Thermometer with Laser Pointer MODEL 42545 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 pointer increases target accuracy while the backlit LCD and handy push buttons combine for convenient ergonomic operation This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for three 3 years from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repa
3. display icon Follow the steps below 1 Press the MODE button until the HAL High Alarm parameter is displayed Use the UP and DOWN arrow keys to set the desired High Alarm temperature setting 2 Press the MODE button until the LAL Low Alarm parameter is displayed Use the UP and DOWN arrow keys to set the desired Low Alarm temperature setting 3 When an alarm limit is reached the audible alarm will sound and the display icon HIGH or LOW will appear on the LCD 4 Note that if the bottom switch located in the battery compartment is set to OFF the audible alarm will be disabled 5 Model 42545A V4 1 02 08 Battery Replacement When the battery symbol appears empty or close to empty replace the meter s 9V battery The battery compartment is located behind the panel that surrounds the meter s trigger The panel can be pried open near the trigger and folded down as shown in the diagram Replace the 9V battery and close the battery compartment cover 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 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 cover
4. he amount of IR energy emitted by an object is proportional to an object s temperature and its ability to emit energy This ability is known as emissivity and is based upon the material of the object and its surface finish Emissivity values range from 0 1 for a very reflective object to 1 00 for a flat black finish For the Model 42545a the emissivity is adjustable from 0 1 to 1 00 Most organic materials and painted or oxidized surfaces have an emissivity factor of 0 95 When in doubt set the emissivity to 0 95 Emissivity Factors for Common Materials Material under test Asphalt Concrete Cement Sand Soil Water Ice Snow Glass Ceramic Marble Plaster Mortar Brick 0 90 to 0 98 0 94 0 96 0 90 0 92 to 0 96 0 92 to 0 96 0 96 to 0 98 0 83 0 90 to 0 95 0 90 to 0 94 0 94 0 80 to 0 90 0 89 to 0 91 0 93 to 0 96 Emissivity Material under test Cloth black Skin human Leather Charcoal powder Lacquer Lacquer matt Rubber black Plastic Timber Paper Chromium Oxides Copper Oxides lron Oxides Textiles Emissivity 0 98 0 98 0 75 to 0 80 0 96 0 80 to 0 95 0 97 0 94 0 85 to 0 95 0 90 0 70 to 0 94 0 81 0 78 0 78 to 0 82 0 90 Model 42545A V4 1 02 08 Specifications Infrared Thermometer Specifications Range Resolution 1 58 to 1892 F 50t0 10000 01 F Accuracy 2 of reading 9 F 4 C lt 30 F 1 C of reading 2 of reading 4 F
5. ing Measurements through transparent surfaces such as glass may not be accurate Steam dust smoke etc can obscure measurements The meter automatically compensates for deviations in ambient temperature However it can take up to 30 minutes for the meter to adjust to extremely wide changes 7 To find a hot spot aim the meter outside the area of interest then scan across in an up and down motion until the hot spot is located Field of View The meter s field of view is 50 1 For example if the meter is 50 inches from the target spot the diameter of the target must be at least 1 inch Other distances are shown in the field of view diagram Note that measurements should normally be made as close as possible to the device under test The meter can measure from moderate distances but the measurement may be affected by external sources of light In addition the spot size may be so large that it encompasses surface areas not intended to be measured Diameter of object 972 10 5 9gcm ecm ZZA 4270m 1 25 36 50 100 0 64m 0 91m 1 27m 2 54m Distance to object 6 Model 42545A V4 1 02 08 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 T
6. ir or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied 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 e Do not point the beam toward anyone s eye or allow CAUTI O N the beam to strike the eye from a reflective surface LASER RADIATION DO NOT STARE INTO BEAM e Do not use the laser near explosive gases or in other e potentially explosive areas lt 1mW Output at 675nm CLASS II LASER PRODUCT Safety e Use extreme caution when the laser pointer beam is on 2 Model 42545A V4 1 02 08 Meter Description 1 Laser pointer beam IR Sensor Measurement Trigger Battery and Switch Compartment LCD Display Push buttons Handle Grip Temperature Units C F Switch 9 Test Lock ON OFF Switch 10 Alarm ON OFF Switch Note There is a tripod mount on the b
7. mming functions of the instrument The selected function is displayed on the bottom line of the LCD Each parameter is listed below with an explanation for its use Press the MODE button to step from one parameter to the next EMS Emissivity Value To change the emissivity value use the UP and DOWN arrows the range is 0 10 to 1 00 The current emissivity setting is always shown at the top of the LCD display A setting of 0 95 covers about 90 of all applications and when in doubt should be set as such Emissivity is discussed in a dedicated section of this manual MAX Maximum function In the MAX mode only the highest reading encountered in the current measurement session is displayed MIN Minimum function In the MIN mode only the lowest reading is displayed DIF Max minus Min value In the DIF mode the MAX less the MIN is displayed AVG Average value In the AVG mode all of the readings in the current measurement session are averaged and the value is displayed HAL High Alarm setting The temperature that when exceeded causes the audible visual alarm to trip LAL Low Alarm setting The temperature that when exceeded high to low causes the audible visual alarm to trip High and Low Alarm Feature The Model 42545a has an alarm feature whereas a High Alarm setting and a Low Alarm setting can be programmed by the user When either Alarm point is reached the meter will alert the user via an audible beep and LCD
8. ny form 8 Model 42545A V4 1 02 08
9. ottom of the handle oO a iN 3 Model 42545A V4 1 02 08 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 temperature reading the flashing SCAN icon the emissivity and the unit of measure will appear Note Replace the 9V battery if the display does not switch on 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 The only exception to this is if the TEST LOCK switch is set to ON Note Select the temperature units F C using the top switch inside the battery compartment Backlight Laser Pointer 1 While pulling the Trigger push the backlight laser button VA once to turn on the backlight 2 Press it again to turn on the laser pointer When the laser is ON the laser icon will appear in the LCD 3 Press the laser button to turn the backlight off Pressing it again turns the laser off Note Backlight and Laser settings will be retained after the meter powers down Over range Indication If the temperature measurement exceeds the specified temperature range the thermometer will display dashes in place of a temperature reading 4 Model 42545A V4 1 02 08 The MODE button options The MODE button is used to access the progra
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