Text preview for : Extech_EA30_Manual.pdf part of TES Extech TES-1335 Extech EA30 TES-1335 Digital Illuminance Meter Instruction Manual. Also known as Extech EA30 Light Meter User's Guide. Service Manual and Calibration.
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User's Guide
EasyView Digital Light Meter
Model EA30
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 to 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 www.extech.com for contact information. 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.
Introduction
Congratulations on your purchase of the Extech EasyView Digital Light Meter which measures light level (illuminance). This device measures up to 40,000 Fc and 400,000 Lux. Careful use of this meter will provide years of reliable service.
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Specifications
Ranges and Resolution Lux 40.00, 400.0, 4000, 40.00k, 400.0kLux Foot candles 40.00, 400.0, 4000, 40.00kfc General Specifications Display Multi-function 3-3/4 (3999) digit LCD with Bargraph indicator Over range indication LCD displays `OL' Spectral response CIE photopic (CIE human eye response curve) Spectral accuracy CIE V function (f1 ï 6%) Measurement Repeatability ±2% o Temperature coefficient ±0.1% per C Sampling rate 13.3 times per second (bargraph); 1.3 times per second (digital display) Photo detector Silicon photo-diode with spectral response filter Peak hold Capture light peaks to 100uS o o Operating conditions Temperature: 32 to 104 F (0 to 40 C); Humidity: < 80% RH o o Storage conditions Temperature: 14 to 140 F (-10 to 50 C); Humidity: < 80% RH Dimensions 5.91 x 2.8 x 1.4" (150 x 72 x 33mm) Weight Approx. 11.3 oz. (320g) with battery Low battery indication "BT" appears on the LCD Power supply 6 `AAA' cells; Battery life approx 400 hours Accuracy ± (3% Rdg + 0.5% FS) ±( 4% Rdg + 0.5%FS, if > 10,000 lux) ± (3% Rdg + 0.5% FS) ±( 4% Rdg + 0.5%FS, if > 1,000 fc)
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Meter Description
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. LCD display Range button Power ON/OFF button Peak hold button Lux select button Photo sensor (lens cover not shown) Sensor input to top of meter Data HOLD button MAX/MIN button fc foot candle select button RELATIVE function button 7
1 2
3 4 5 6
8 9 10
Note: Battery compartment is located on the rear of the instrument
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Operation
Turn Power ON or OFF 1. Press the button to turn power on or off. The meter will perform a short self-test when turned on. Light sensor 1. The light sensor is permanently attached to the meter. A coiled cable attaches the sensor to the meter. 2. The white domed light sensor lens is a photo diode and resides underneath the protective cap. 3. The meter automatically zeroes, therefore a zero calibration is not necessary. 4. The back of the sensor has a tripod mounting hole. Taking light measurements 1. Remove the protective cap from the sensor and face the white domed light sensor toward the source of light to be monitored. For overhead lighting, the sensor can be placed on a desk or table top. 2. The light being measured must encompass the entire white sensor dome. 3. Read the light level on the LCD. If the light measurement is out of range an "OL" indication will appear on the display. If the `OL' appears, select another range by pressing the RANGE button. Selecting Lux or Foot candle units of measure Press the LUX button to select lux units and the fc button to select foot candle units. MX MN Function (stores/recalls highest MX and lowest MN readings) Press the MX/MN button once to put the meter in MX mode. The meter will now display only the highest reading (MX is displayed on the upper left-hand portion of the LCD). Press MX/MN again to put the meter in MN mode where the meter displays only the lowest reading (MN icon is displayed). Press MX/MN again to have the meter continue to record the highest and lowest readings but display only the current reading (both MX and MN icons appear flashing), then use the MX/MN button to scroll through the highest and lowest readings. To exit the MX MN mode, press and hold the MX/MN button until the MX and MN icons completely disappear.
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Data Hold Press the HOLD button to freeze the displayed reading. The 'H' hold icon will appear on the upper right-hand side of the display. Press the HOLD button again to return to normal operation (the 'H' hold icon will disappear). When hold function is enabled the analog bar graph will continue to display level changes. Peak Hold The Peak Hold feature allows the meter to captures light level changes that occur in as little time as 100us. Press the PEAK button momentarily and the `P+' icon will appear on the LCD. The meter can now measure a fast acting light peak and display it on the LCD. To exit the Peak Hold mode, press and hold the PEAK button until the `P+' icon disappears. NOTE: If the PEAK button is pressed momentarily rather then pressed and held when exiting the Peak mode, the meter will display `P-` which is a function reserved for future use and should be ignored. Relative mode Measurements can be displayed as a difference between actual light level and a stored reference value. To store a reading as a reference, press the REL button when the desired reference measurement is on the LCD (the triangle icon will appear steady in the upper left-hand corner of the LCD). All subsequent displayed readings will be "relative" to the stored reference value. For example, if the reference value is 100 and the actual light level is 125, the meter will display 25. To view the reference value, press the REL button again so that the triangle icon begins to flash. The displayed value will be the reference value. To exit the Relative mode, press and hold the REL button until the triangle icon disappears.
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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 power falls low, the `BT' symbol will appear on the lower left-hand side of the LCD. 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.
Support line (781) 890-7440
Technical support: Extension 200; E-mail: [email protected] Repair & Returns: Extension 210; E-mail: [email protected] 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 © 2005 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.
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Appendix
Typical Light Levels Lux 20-75 75-150 150-300 300-750 750-1,500 1,500-3,000 75-100 100-200 200-750 Foot Candles 2-7 7-15 15-30 30-75 75-150 150-300 7-10 10-20 20-75 Factories Emergency Stairs, Warehouse Exit/Entrance Passages Packing Work Visual Work: Production Line Typesetting: Inspection Work Electronic Assembly, Drafting Office Indoor Emergency Stairs Corridor Stairs Lux 100-150 150-200 200-300 300-500 500-1,500 1,000-2,000 75-150 150-300 300-750 750-1,500 Foot Candles 10-15 15-20 20-30 30-50 50-150 100-200 7-15 15-30 30-75 75-150 Home Washing Recreational Activities Drawing Room, Table Makeup Reading, Study Sewing Restaurant Corridor Stairs Entrance, Wash Room Cooking Room, Dining Table Show Window Hospital Emergency Stairs Stairs Sick Room, Warehouse Waiting Room Medical Exam Room Operating Room
Conference, Reception Room 750-1,500 75-150 Clerical Work 1,500-2,000 150-2000 Typing, Drafting Store 75-150 7-15 Indoors 150-200 15-20 Corridor/Stairs 200-300 20-30 Reception 300-500 500-750 750-1,500 1,500-3,000 30-50 50-75 75-150 150-300 Display Stand Elevator Show Window, Packing Table Storefront, Show Window
30-75 75-100 100-150 150-200 200-750 750-1,500
3-7 7-10 10-15 15-20 20-75 75-150
5,000-10,000 500-1000 Eye Inspection
Spectral Sensitivity
R e l a t i v e R e s p o n s e
1 0.8 0.6 0.4 0.2 0 400 550 600 650 700 Wavelength (nm) _____ - - - - - Light Meter Response CIE Response 450 500
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