User`s Manual Non-Contact Infrared
Contents
1. Display 3 1 2 digit 2000 count backlit LCD with over range and low battery indication Battery life 30 hours continuous typical with carbon zinc battery laser pointer and backlight off Dimensions Weight 6 7 x 1 7 x 1 6 170 x 44 x 40mm 5 6 oz 160g 3 403265 Version 1 3 Feb 2003 Field of View The meter s field of view is 10 1 For example if the meter is 10 inches from the target the diameter of the object under test must be at least 1 inch The object under test should actually be larger than the spot size shown in the diagram below The smaller the target the closer the meter should be to the target As the distance from the target increases the area measured by the meter spot becomes larger Diameter of Spot in inches Sensor Beam Laser Beam Distance to Target in inches 4 403265 Version 1 3 Feb 2003 Basic Operation CAUTION 1 Strong electromechanical radiation or static discharges can cause reading errors if situated near the meter 2 An explosion potential exists if the meter is exposed to corrosive or explosive gases 3 Avoid high humidity direct sunlight high temperature or condensation when measuring 4 Do not point the laser beam into direct sunlight or other source of strong light 5 Do not touch the meter s lens and do not allow the object tested to touch the lens 6 Do not place the meter on a hot surface 158 F 70 C 7 fthe meter is exposed t2. User s Manual EXT INSTRUMENTS Non Contact Infrared Thermometer Model 403265 EXTECH 403265 Introduction Congratulations on your purchase of the Extech 403265 IR Thermometer This thermometer provides contact free temperature measurements with built in laser pointer Careful use of this meter will provide years of reliable service WARNING The Laser button A enables disables the Laser function When enabled each press of the MEAS button triggers the Laser beam Avoid looking directly into the path of the Laser or pointing the Laser toward anyone s eyes Mirrored surfaces near a measurement object can redirect the Laser use extreme caution Do not allow the Laser beam to be directed toward explosive gases 2 403265 Version 1 3 Feb 2003 Meter Description 1 Infrared sensor top Laser source top LCD Temperature Display Mode button Laser pointer and Down arrow button Backlight and Up arrow button Measure button MEAS DU Ox gu mop Nw Note Battery compartment is on rear of meter Specifications General Specifications Range Resolution 4 to 1022 F 20 to 550 C 1 F C Accuracy 2 of reading or 6 F 3 C whichever is greater 64 4 to 82 4 F 18 to 28 C ambient temperature Temperature A 0 2 of reading or 0 36 F 0 2 C whichever is greater Coefficient change in accuracy per F C change in ambient temperature gt 82 4 F 28 C or lt 64 4 F 18 C
3. accesses the configuration mode The following parameters can be configured Emissivity value High Alarm setpoint ALM Hi Low Alarm setpoint ALM Lo Maximum reading MAX and Minimum reading MIN Emissivity Adjust 1 Inthe HOLD mode press the MODE button 2 Use the UP DOWN arrow buttons to set the desired emissivity from 0 10 to 1 00 The normal value is 0 95 High Alarm Set Point 1 In the HOLD mode press the MODE button two times ALMHi will appear in the display 2 Use the UP DOWN arrow buttons to set the desired Hi Alarm set point Low Alarm Set Point 1 In the HOLD mode press the MODE button three times ALM Lo will appear in the display 2 Use the UP DOWN arrow buttons to set the desired Lo Alarm set point MAX MIN 1 Inthe HOLD mode press the MODE button four MAX amp five MIN times to view the highest MAX and lowest MIN temperatures measured since the meter was last turned on 2 In the Measure mode press the MODE button to step through the highest MAX lowest MIN and current temperature 6 403265 Version 1 3 Feb 2003 Measurement Notes 1 2 The object under test should be larger than the spot size calculated by the field of view diagram see Field of View diagram above If the surface of the object under test is covered with frost oil grime etc clean before taking measurements If an object s surface is highly reflective apply masking tape or flat black paint before m
4. des 0 78 Mortar 0 89 to 0 91 Iron Oxides 0 78 to 0 82 Brick 0 93 to 0 96 Textiles 0 90 7 403265 Version 1 3 Feb 2003 Battery Replacement When the low battery symbol E appears on the LCD replace the meter s four 4 AAA 1 5V batteries The battery compartment is located on the rear of the meter Open the compartment by removing the screw and sliding the battery compartment cover off in the direction of the arrow Replace batteries observing polarity and re install the battery compartment cover Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year 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 repair or unauthorized modification E
5. easuring The meter cannot measure through transparent surfaces such as glass Steam dust smoke etc can obscure accurate measurements The meter compensates for deviations in ambient temperature It can however take up to 30 minutes for the meter to adjust to extremely wide temperature changes 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 Emissivity Note Most organic materials and painted or oxidized surfaces have an emissivity factor of 0 95 Inaccurate readings will result from measuring shiny or polished metal surfaces which have emissivity factors other than 0 95 To compensate for polished shiny surfaces cover the surface with masking tape or flat black paint Allow time before measuring for the tape to reach the same temperature as the material underneath it Emissivity Factors for Common Materials Material under test Emissivity Material under test Emissivity Asphalt 0 90 to 0 98 Cloth black 0 98 Concrete 0 94 Skin human 0 98 Cement 0 96 Lather 0 75 to 0 80 Sand 0 90 Charcoal powder 0 96 Soil 0 92 to 0 96 Lacquer 0 80 to 0 95 Water 0 92 to 0 96 Lacquer matt 0 97 Ice 0 96 to 0 98 Rubber black 0 94 Snow 0 83 Plastic 0 85 to 0 95 Glass 0 90 to 0 95 Timber 0 90 Ceramic 0 90 to 0 94 Paper 0 70 to 0 94 Marble 0 94 Chromium Oxides 0 81 Plaster 0 80 to 0 90 Copper Oxi
6. g held Press the MEAS button to take another measurement The meter will automatically power off after 20 seconds of inactivity Continuous Measurement Mode 1 2 3 Point the meter toward the device under test Press the MEAS button to toggle between MEASURE and HOLD The meter will automatically turn OFF after 20 seconds in the HOLD function it will remain ON in the MEASURE function LCD Backlight Use the backlight button to enable or disable the LCD backlight feature When activated the backlight turns on each time the MEAS button is pressed it automatically turns off to preserve the batteries 5 403265 Version 1 3 Feb 2003 Laser Pointer The Laser is used to help aim the IR sensor The Laser button center enables the Laser Pointer feature When enabled the meter emits the red laser beam each time the MEAS button is pressed A triangle with a black circle appears in the top left of the LCD to let the user know that the Laser function is enabled The triangle display icon is cleared when the Laser feature is disabled Note that the Laser pointer beam and the IR sensor beam are separated by 0 63 inches Refer to the Field of View diagram C F Select With the meter off press and hold the backlight button then press the MEAS button to select degrees F With the meter off press and hold the laser button A then press the MEAS button to select degrees C MODE Button Pressing the MODE button while HOLD is active
7. o significant changes in ambient temperature hot to cold or cold to hot allow 20 minutes for the meter to stabilize before taking measurements 8 This unit is not dust proof or water proof Use caution when using and storing the meter Power ON The meter is powered by four 4 AAA 1 5V batteries rear battery compartment Press the red MEAS button to turn power on The word SEE should appear followed by a temperature reading If not check that the batteries are installed and fresh The meter does not have an OFF button it automatically powers down after 20 seconds to preserve battery life Taking Readings There are two modes of operation the Standard Mode and the Continuous Mode In the Standard Mode the meter will measure and update the display while the MEAS button is depressed In the Continuous Mode the meter will continuously measure and update the display after the MEAS button is pressed once auto power off is disabled Pressing the MEAS button again will enable the HOLD function and the meter will turn off after 20 seconds Hold the MODE button down while turning power ON to toggle between the two modes Standard Measurement Mode 1 2 3 4 5 Point the meter toward the device under test Press and hold the MEAS button and allow the reading to stabilize on the LCD display Release the MEAS button The stabilized reading will now be held on the LCD HOLD will appear on the LCD to indicate that the reading is bein
8. xtech 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 complete repair and calibration services for all of the products we sell For periodic calibration NIST certification or repair of any Extech product call customer service for details on services available Extech recommends that calibration be performed on an annual basis to ensure calibration integrity T Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2003 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 8 403265 Version 1 3 Feb 2003
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