User`s Manual - Reliability Direct, Inc.
Contents
1. 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 is inclusive and no other warranty whether written or oral is expressed or implied Seat dia 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 7 EA31 V1 1 02 032. 1 0 to 10 7 Highway f Full moon Foot candle Lux conversion 1 lux 09290 foot candles 1 foot candle 10 764 lux EA31 V1 1 02 03 Maintenance Cleaning and storage 1 The white plastic sensor dome should be cleaned with a damp cloth when necessary 2 Store the meter in an area with moderate temperature and humidity refer to the operating and storage range in the specifications chart earlier in this manual Battery Replacement When the battery voltage is low the BT symbol will appear on the display Replace the six 6 1 5 AAA batteries by removing the rear center battery compartment screw and accessing the battery compartment Observe polarity when placing the batteries in the compartment Ensure that the compartment cover is securely fastened when finished 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 6 EA31 V1 1 02 03 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
3. User s Guide EXTECH INSTRUMENTS EasyView Digital Light Meter Model EA31 Introduction Congratulations on your purchase of the Extech EasyView Digital Light Meter which measures the amount of light falling on a surface illuminance in Foot candles or Lux This device measures up to 20 000 Fc and 20 000 Lux Careful use of this me ter will provide years of reliable service Specifications Units Ranges and Accuracy Resolution Lux 20 00 200 0 2000 20 00kLux 3 rdg 0 5 FS Foot candles 20 00 200 0 2000 4 rdg 10 digits if gt 10 000 lux fc 20 00kfc General Specifications Display 3 1 2 digit 2000 count LCD Over range indication LCD displays OL Spectral response CIE photopic CIE human eye response curve Cosine corrected Spectral accuracy CIE VO function f4 06 Measurement Repeatability 2 Calibration Calibrated to a standard incandescent lamp at color temperature 2856 K Temperature coefficient 0 1 per C Sampling rate 2 5 times per second Photo detector Silicon photo diode and spectral response filter Operating conditions Temperature 32 to 104 F 0 to 40 C Humidity lt 80 RH Storage conditions Temperature 14 to 140 F 10 to 50 C Humidity lt 80 RH Dimensions 5 91 x 2 8 x 1 4 150 x 72 x 35mm Weight Approx 11 3 oz 320g with battery Photo Detector Dimensions 3 62 x 2 36 x 1 14 92 x 60 x 29mm Det
4. ector cable length 3 91cm approximately Low battery in Power supply dication BT appears on the LCD 6 AAA cells Battery life approx 400 hours 2 EA31 V1 1 02 03 Meter Description 1 NOaRWOND LCD display Range button Power ON OFF button lux fc selection button Data HOLD button MAX MIN button Photo sensor lens cover not shown Tripod mount on rear of sensor Note Battery compartment is located on the rear of the instrument Spectral Sensitivity Relative Response 0 8 0 6 0 4 0 2 400 450 500 550 600 Wavelength nm aaa Light Meter Response 650 700 CIE Response EA31 V1 1 02 03 Operation Power ON or OFF Press the button to turn power on or off Units of measure Press the lux fc button to select the unit of measure fc or lux will appear in the display Light sensor 1 The light sensor is attached to the meter with a coiled cable which allows placement of the sensor up to approximately 3 feet from the meter 2 The light sensor is a silicon photo diode and resides under the white domed lens 3 To protect the lens from scratches keep the protective cap on the sensor whenever the unit is not in use 4 The back of the sensor has a tripod mounting hole Taking measurements 1 Remove the protective cap from the sensor 2 Place the sensor in a horizontal position at the measurement location 3 Read the light
5. level on the display If the light measurement is out of range an OL indication will appear on the display If the OL appears select a higher range by pressing the RANGE button MX MN Function 1 Press the MX MN button once to put the meter in MX MN mode The meter will now display the highest reading that occurs while the function is enabled The MAX icon will appear in the display 2 Press the MX MN button again to display the lowest reading that occurs while the function is enabled The MIN icon will appear in the display 3 Press MX MN again to toggle between the MAX and MIN readings 4 To exit the MX MN mode and return to the normal real time display press and hold the MX MN button 2 seconds until the MAX and MIN icons disappear Data Hold Press the HOLD button to freeze the displayed reading The Tt hold icon will appear on the display Press the HOLD button again to return to normal operation 4 EA31 V1 1 02 03 Reference Foot candles Lux Typical Light Levels gt 10000 gt 107600 Sunlight 1000 to 10000 10760 to 107600 Operating Table 100 to 1000 1076 to 10760 Assembly fine Football stadium Emergency room Drafting table 10 to 100 107 to 1076 Overcast day Assembly general Classroom Casual reading Shipping area Stairwell Auditorium 1 to 10 10 7 to 107 ATM machine Storage room Building entrance Parking lot 0 to
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