Instruction Manual
Contents
1. 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 insure calibration integrity Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for three 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 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 is2. inclusive and no other warranty whether written or oral is expressed or implied Copyright 2001 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 4 407026 Ver 2 1 1 01 Typical Light Levels Lux Foot Lux Foot Candles Candles Factories fT CT Home 20 75 Emergency Stairs Warehouse 100 150 10 15 75 150_ 7 15 u 7 15 Exit Entrance Passages 150 200 15 20 Recreational Activities 150 300 15 30 Packing Work 200 300 20 30 Drawing Room Table 1 500 3 000 150 300 Electronic Assembly Drafting 1 000 2 000 100 200 aa o Office f 75 100 Indoor Emergency Stairs 300 750 30 75 Visual Work Production Line 300 500 30 50 750 1 500 75 150 Typesetting Inspection Work 500 1 500 50 150 Reading Study a 1 7550 Ooo OoOo D S a i Hospital 75 750 3075_ _37 i el or Emergency Stairs EE 1 500 3 000 150 300 Storefront Show Window 5 000 10 000 500 1000 Eye Inspection Common Conversion Factors llluminance Visible Flux Density 4 mim 104 phot ph Luminance Visible Flux Density per Solid Angle 1 Im m2 sr 1 candela m2 Luminous Intensity Visible Flux per Solid Angle 1 candella Luminous Flux Visible Flux 1 lumen Im 4 464 x 10 3 watts 555 nm 750 1 500 75 150 Clerical Work 750 1 500 75 150 Show Window 1 500 2 000 150 2000 Typing Drafting 200 750 20 75 Conference Reception Room 3
3. 00 750 30 75 Cooking Dinning Room 7 0 i i i F Produc i i i 00200 1020 Coridor Stairs 150300 1530 Entrance Wash Room Recep i i i i i i i i Pat i T Tech Support Hotlines 781 890 7440 ext 200 extech extech com www extech com 5 407026 Ver 2 1 1 01
4. User s Manual EXTECH Model 407026 Heavy Duty Light Meter Introduction Congratulations on your purchase of Extech s 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 Specifications General Specifications Display Dual function 0 5 13 mm 3 1 2 digit 1999 count LCD display 59y inconvastagusiment ao CS 0D OD Soy LUX 0 to 50 000 LUX 3 range Fc 0 to 5000 Fc 3 range Relative mode 0 to 1999 32 F to 122 F 0 C to 50 C lt 80 RH 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 2 000 LUX 0 1 999 LUX 1 LUX 4 2 digits 20 000 LUX 1 800 19 990 LUX 10 LUX full scale 50 000 LUX 18 000 50 000 LUX 100 LUX Foot Candie 0 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 Meter Description LCD Display Keypad Light sensor Battery compartment rear Sensor input socket RS232 output socket Protective Holster A NOOR WD 2 407026 Ver 2 1 1 01 Operation 1 Press the Power Off On key to power the meter Check the battery if display does not indicate characters Zero Calibration for Sensor a Place
5. is not pressed in any 10 minutes period To disable Auto shut off press the RECORD button to engage the record function 2 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 3 The Zero recalibration procedure described in a previous section should be followed whenever the meter is powered up 4 When recalibrating use a tungsten lamp 2856 K and be sure to select Tungsten as the light source RS232 PC Interface The meter has a RS232 serial data port This interface was designed to operate with the Extech Data Acquisition Software p n 407000 and enables the user to capture store and display readings on a PC For more information contact Extech or refer to the 407000 user s manual for details on the PC interface Battery Replacement The low battery indication appears as a LBT on the left corner of the display When the LBT appears 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 Pry the Battery Cover off using a small coin or screwdriver and remove the battery 3 Replace the 9V battery heavy duty type and reinstall the cover 4 Make sure the battery cover is secured after changing the battery
6. s pressing the key causes the display to read 100 This means that the reading on the LCD at the time of the key press 100 and all subsequent readings will be relative to that reading For example if 100 Fc was on the display at the time of the key press and the next reading was 50 Fc the display would read 50 since 50 Fc is 50 of 100 Fc New values are calculated as Measured Light Value Reference Light Value when is pressed Press the key again to release the relative light function and return to normal operation Data Record MAX MIN AVG Readings When selected the DATA RECORD function records and stores the maximum minimum and average readings To start the DATA RECORD function a b Press RECORD once The REC indicator will appear on the display Press RECALL once to retrieve the Max reading The Max indicator along with the maximum values will appear on the LCD display Press RECALL once the Min indicator along with the minimum values will appear on the LCD display Press RECALL once the AVG indicator along with the average values will appear on the LCD display To disable the Data Record function press Record again The display indicators REC Max Min AVG will disappear 3 407026 Ver 2 1 1 01 Measurement Considerations 1 The meter is designed with an Auto shut off feature to conserve battery life The meter will automatically turn off if a function button
7. the Sensor Cover over the Light Sensor b Select the 2 000 LUX range via the Range Switch c Press the Zero key The display will null display zero d Remove the Sensor Cover from the Light Sensor Select the desired unit of measure by pressing the LUX Fc key The display will indicate LUX or Fc as selected Select the type of lighting to be measured by pressing the Light Source Select key The display will indicate the lighting type icon from the list below L Tungsten Daylight F Fluorescent S Sodium C Mercury For Halogen and Metal Halide light use the Tungsten setting When making measurements always start at the highest range and work down use the Range Switch to select ranges If the display indicates the input exceeds the maximum for the range Select a higher range If the display indicates ____ the input is too low Select a lower range Hold the Light Sensor so that the sensor faces the light source to be measured The display will indicate the light intensity value In the 20 000 LUX and 5 000 Fc ranges the last digit will appear on the lower line of the LCD display In the 50 000 LUX range the last two digits will appear on the lower line of the LCD display Data Hold During the measurement pressing Data Hold will freeze the displayed value and the LCD will display the D H indicator Press Hold again to release the data hold function Relative Mode During measurement
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