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DIGITAL LIGHT METER

DIGITAL LIGHT METER. 1994. LIGHT METER. CT Lutron LX-105. Dr. Lim Jac Fang Occupational Health Doctor Department of Health, Sabah. FEATURES. Microprocessor circuit ensure high accuracy an also provide special function and features

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DIGITAL LIGHT METER

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  1. DIGITAL LIGHT METER 1994 LIGHT METER CT Lutron LX-105 Dr. Lim Jac Fang Occupational Health Doctor Department of Health, Sabah

  2. FEATURES • Microprocessor circuit ensure high accuracy an also provide special function and features • Super large LCD display with contrast adjustment for viewing angel. • Dual function display • Heavy duty & compact case • Record Minimum, Maximum & Average readings • Data Hold • Auto power off saves battery life • Operates from 9V battery

  3. FEATURES (cont..) • RS 232 PC serial interface • Spectrum of photo sensor meets C.I.E • Wide range measurement both LUX & foot candle units • Relative % light measurement • User selectable lighting type (Tungsten, Fluorescent, Daylight or Mercury) • Zero adjustment by push button

  4. GENERAL SPECIFICATIONS Circuit – Custom one-chip microprocessor LSA circuit Display – 13mm with contrast adjustment Lighting type – Daylight, Tungsten, Fluorescent, Mercury Measurement range – LUX 0- 50,000 LUX , 3 ranges - Foot candle 0 – 5,000 ft-cd, 3 ranges - Relativity – 0 – 1999% Sensor – Photo diode & color correction filter Memory – Max, Min and Average readings Sample Time – Approx 0.4 sec Zero Adj. – By push button Power off – manual off or auto shut off (after 10 min)

  5. GENERAL SPECIFICATIONS (cont…) Data output – RS 232 PC serial Operating temperature - 0°C - 50°C (32°F - 122°F) Operating Humidity – Max 80% RH Power supply - 06P DC 9V battery (heavy duty) Weight – 335g/0.77IB (Included batteries) Size – 180 x 72 x 32 mm (7.1 x 2.8 x 1.3 inch) Accessories - instruction manual - Sensor cover

  6. DIGITAL LIGHT METER 15 16 1- Display 2- Power Off/On 3- Data Hold Button 4- LUX/FC Button 5- Memory Record Button 6- Memory Call Button 7- Light Source Button 8- Zero button 9- % Button 10- Range Switch 11- LCD contrast adjust 12- Light Sensor 13- Sensor cover 14- Light sensor plug 13 12 2001 1 4 3 11 2 6 5 7 8 10 9 14 LIGHT METER CT Lutron LX-105 17 15- Light sensor input socket 16- RS-232 Output 17- Battery compartment cover

  7. MEASURING PROCEDURE Push Power Off/On Button Zero Adjust Procedures 1. Cover the light sensor-using the Sensor Cover 2. Slide the Range Switch to the 2000 LUX Position 3. Push the Zero Button-display will show zero values 4. Upon completion, remove the sensor cover Select the desired measuring unit by pressing the LUX/FC Button

  8. Determine the lighting type by pressing the Light Source Select Button L= Tungsten, F= Fluorescent, S= Day Light, C= Mercury Select the max. Range using the Range Switch If display shows “- - - -”, it indicates an overload condition, select the next higher range If display shows “- - - -”, it indicates an out of range, select the next lower range Position the Light Sensor directly under light source

  9. -On the 20000 LUX range, the last digit will be shown on the lower line of LCD display -On 50000 LUX range, the last two digit will be shown on the lower line of LCD display For example:- On the 20000 LUX range, if display show 1562 LUX 0

  10. Data Hold During measurement, pushing the “Data Hold Button will hold the display values and the LCD will show “D.H” symbol To cancel the Data Hold function, press the Data Hold Button, once more

  11. Relative % light measurement During measurement, press the “%” Button. The current measured value will indicated as 100% All the subsequent measurement will be indicated as percentage, relative to the value when the button was pressed The formula used is as shown below: The new light values X 100 The light values when the % button was pressed To de-activated- press “%” Button

  12. Data Record (Max., min & Average reading The DATA RECORD function displays the max, min & Average readings. To start the Data Record function, press the “Record Button” once

  13. With the “REC” symbol indicated on display A. Push the “CALL Button” once - maximum values (max) B.Push the “CALL Button” once again – minimum (Min) values C. Push the “CALL Button” once more – average (AVG) values To de-activate the Data Record function, Press the “Record Button” once again

  14. BATTERY REPLACEMENT When the left corner LCD display show “LBT” -spec measurement may still be made for several hours after low battery indicator appears before the instrument becomeinaccurate

  15. THANK YOU FOR YOUR ATTENTION

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