Instruction Manual
Contents
1. on the PC interface Battery Replacement When the low battery indicator appears LBT replace the battery as soon as possible Reliable readings can be obtained for several hours after the first appearance of the low battery indication To replace the battery 1 Remover the meter s rubber protective holster 2 The battery compartment is located on the lower back of the meter Pry the battery compartment cover off using a small coin or screwdriver and remove the battery 3 Replace the 9V battery and reinstall the cover 4 Ensure that the battery cover is secured after replacing the battery 6 Model 407026 Version 2 3 anuary 2004 Typical Light Levels Foot 1 Foot Candles 7 Candles SOSO a E T E a Factories Emergency Stairs Warehouse Exit Entrance Passages Sick Room Warehouse 75 150 Show Window Packing Table 750 1 500 75 150 Operating Room 150 300 Storefront Show Window 5 000 500 1000 Eye Inspection 10 000 luminance Visible Flux Density 1 lux Ix Luminous Flux Visible F lux 1 lumen Im 1 464 x 10 watts 555 nm 7 Model 407026 Version 2 3 J anuary 2004 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 calibrat2. 3 J anuary 2004 Operation Meter Power and Automatic Power Off 1 Press the POWER button to turn the meter on If the display does not switch on check the 9V battery Press the POWER button again to turn the meter off The meter has an automatic power off feature that conserves battery energy After 10 minutes the meter automatically shuts off To defeat this feature press the RECORD button to put the meter in the recording mode Display ZERO Calibration Please perform a zero calibration before each use This will ensure the highest accuracy 1 Place the sensor cover over the light sensor effectively blocking all light to the sensor 2 Select the 2 000 LUX range using the RANGE switch 3 Press the ZERO button The reading should be zero 4 Remove the sensor cover from the light sensor and proceed Selecting the unit of measure Press the LUX Fc button to select the desired unit of measure The display icons will reflect the current setting Selecting a light source Select the type of lighting to be measured by pressing the LIGHT SOURCE button The display will indicate the lighting type icon see icon list below L Tungsten Daylight use this setting when calibrating with a Tungsten lamp F Fluorescent S Sodium C Mercury Note For Halogen and Metal Halide light use the Tungsten setting Taking Measurements Hold the light sensor in the area where light is to be collected The light being measured must encompass t
3. User s Guide EXTECH INSTRUMENTS Heavy Duty Meter Model 407026 POWER HOLD LUX FC RECORD RECALL LIGHT SOURCE LUX 2000 20000 5i L Tungste n Daylight i ig ie lourescen say Cardle lux 407026 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 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
4. evel reference is on the display When the button is pressed 100 will be displayed and the icon will appear After the button is pressed light measurements will be displayed as a percentage of the reference value For example if the light level reference is 1000 LUX a display of 500 LUX will be represented as 50 Further a light level of 250 LUX will display as 25 Use the equation below Light measurement Display n n anna nnn nnn nnn en enn nnn ene enn n X 100 Stored reference light measurement Press the button again to return to normal operation Maximum MAX Minimum MIN and Average AVG readings The meter can keep track of the highest lowest and average readings for later recall 1 Press the RECORD button to start tracking the MAX MIN and AVG readings The REC display will switch on 2 When desired press the RECALL button 3 The MAX display icon appears next to the REC display icon The reading shown is the highest reading encountered since the RECORD button was pressed Press RECALL twice more to view the MIN and AVG readings Press the RECORD button to return to normal operation RS 232 PC Interface This meter is equipped with a RS 232 serial data port This interface is for use with the Extech Data Acquisition Software Part number 407001 and enables the user to capture store and display readings on a PC Contact Extech or refer to the 407001 user manual for details
5. he entire surface of the light sensor dome pin point lighting such as with LED light cannot be measured The display will indicate the light intensity value in LUX or Foot candles Fc Note that since the main display area is limited to a reading of 1999 the right most digit in the 20 000 LUX and 5 000 Fc ranges appears on the lower LCD line In the 50 000 LUX range the last two digits appear on the lower LCD line It may be necessary to adjust the display contrast due to a change in viewing angle or voltage drift Use the LCD Contrast adjustment located on the right side of the meter to set the preferred contrast Display Range Selection Take a measurement starting at the highest range and then work down using the RANGE switch If the display shows dashes along the top of the reading area _ the input exceeds the maximum value for the selected range select a higher range If the display shows dashes along the bottom of the reading area _ _ _ the input is too low select a lower range 5 Model 407026 Version 2 3 anuary 2004 Data Hold While measuring press the HOLD button to freeze the reading The LCD will display D H indicating that the Data Hold function is engaged Press HOLD again to return to normal operation Relative Mode In the RELATIVE mode of operation the meter displays light level as a comparison to a reference value The reference value is stored by pressing the button while the desired light l
6. ions be performed to verify meter performance and accuracy 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 2004 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 8 Model 407026 Version 2 3 J anuary 2004
7. is inclusive and no other warranty whether written or oral is expressed or implied Introduction Congratulations on your purchase of the Extech Heavy Duty Light Meter This light meter offers selectable lighting types data record recall relative display mode and PC interface This professional meter with proper care will provide years of safe reliable service 2 Model 407026 Version 2 3 J anuary 2004 Specifications General Specifications Custom one chip LSI microprocessor circuit LUX 0 to 50 000 LUX 3 range Fe 0 to 5000 Fc 3 range Relative mode 0 to 1999 Instrument 7 1 x 2 8 x1 3 180 x 72 x 32 mm Sensor 3 3 x 2 2 x 0 7 85 x 55 x 17 5 mm Range Specifications Measurement Range 4 2 digits of full scale Relative mode O 1999 Note The accuracy specification above applies to calibration performed using a precision standard incandescent tungsten light source of 2856 K with meter on the tungsten setting 3 Model 407026 Version 2 3 J anuary 2004 Meter Description 1 LCD Display 2 Keypad 3 Light sensor 4 Battery compartment rear 5 Sensor input 6 RS 232 PC Interface jack 7 Protective Holster 8 LCD Contrast Adjust 5300 5 _ ae pe h REC Max AVG Min POWER HOLD LUX FC RECORD RECALL LIGHT SOURCE O O ZERO RANGE LUX 2000 20000 50000 L Tungsten Daylight Fe 200 2000 5000 F Flourescent S Sodi Mercury T Onell 407026 4 Model 407026 Version 2
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