Digital Light Meter Model LT300

Transcription

1 Usr Guid Digital Light Mtr Modl LT300

2 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrumnt to b fr of dfcts in parts and workmanship for on yar from dat of shipmnt (a six month limitd warranty applis to snsors and cabls). If it should bcom ncssary to rturn th instrumnt for srvic during or byond th warranty priod, contact th Customr Srvic Dpartmnt at (781) xt. 210 for authorization or visit our wbsit for contact information. A Rturn Authorization (RA) numbr must b issud bfor any product is rturnd to Extch. Th sndr is rsponsibl for shipping chargs, fright, insuranc and propr packaging to prvnt damag in transit. This warranty dos not apply to dfcts rsulting from action of th usr such as misus, impropr wiring, opration outsid of spcification, impropr maintnanc or rpair, or unauthorizd modification. Extch spcifically disclaims any implid warrantis or mrchantability or fitnss for a spcific purpos and will not b liabl for any dirct, indirct, incidntal or consquntial damags. Extch's total liability is limitd to rpair or rplacmnt of th product. Th warranty st forth abov is inclusiv and no othr warranty, whthr writtn or oral, is xprssd or implid. Introduction Congratulations on your purchas of th Extch LT300 Digital Light Mtr. Th LT300 masurs light lvl (illuminanc) to 200,000 Lux (20,000 Fc). Th LT300 offrs a backlit display, MAX/MIN, Data Hold, Rlativ, Pak, and Rst faturs. This instrumnt is shippd fully tstd and calibratd and, with propr us, will provid yars of rliabl srvic. Mtr Dscription 1. Snsor cabl 2. Analog bargraph 3. Numrical display 4. RANGE button 5. ON/OFF button 6. MAX/MIN button 7. RESET button 8. LCD Backlight button 9. LUX button 10. Fc foot candl button 11. Protctiv rubbr jackt 12. RELATIVE button 13. Data HOLD button 14. PEAK button 15. Photo snsor dom Nots: Protctiv snsor cap not shown. Battry compartmnt, Tilt Stand, and Tripod Mount ar locatd on th rar of th instrumnt. Th protctiv rubbr jackt must b rmovd from mtr to accss battry compartmnt. 2

3 Opration Light snsor 1. Th light snsor is prmanntly attachd to th mtr by th coild cabl. 2. Rmov th protctiv cap by unsnapping it to xpos th whit domd light snsor. Whn th snsor s protctiv cap is rmovd, th whit domd light snsor lns will bgin to captur light. Rplac th cap whn th mtr is not in us. Turn Powr ON or OFF Prss th button to turn powr on or off. If th display dos not switch on, chck that th 9V battry is installd and is frsh. Slcting Lux or Foot candl units of masur Prss th LUX button to slct lux units or th Fc button to slct foot candl units. Masurmnt Procdur 1. Rmov th protctiv cap from th snsor so that th whit domd light snsor is xposd to th light. For ovrhad lighting, th snsor can b placd on a dsk or tabl top. A tripod mount and a tilt stand ar locatd on th rar of th mtr for convninc. 2. Th display will indicat th light lvl in Fc or Lux. 3. Prss th RANGE button to slct th rang that provids th maximum rsolution. If th OL appars th light masurmnt is out of rang. Slct anothr rang using th RANGE button. 4. Prss th backlight button to illuminat th LCD display if ndd. MAX/MIN Th Max/Min function allows for rcording and display of th maximum and minimum light lvls ovr tim. 1. Prss th MAX/MIN button. Th MAX display icon will appar and mtr will now display and hold only th highst rading. Th display will updat only whn a highr rading is masurd. 2. Prss MAX/MIN button. Th MIN display icon will appar and mtr will now display and hold only th lowst rading. Th display will updat only whn a lowr rading is masurd 3. Prss MAX/MIN again. Th MAX MIN display icons will appar flashing and mtr will now display th currnt rading, but will continu to rcord th highst and lowst valus. 4. Prss MAX/MIN again to cycl through MAX and MIN displays. 5. To xit th MAX MIN mod, prss and hold th MAX/MIN button until th MAX and MIN icons compltly disappar. Data Hold Prss th HOLD button to frz th displayd rading. Th MANU HOLD hold icon will appar on th display. Prss th HOLD button again to rturn to normal opration. Whn th Data Hold function is nabld th analog bar graph will continu to display lvl changs. 3

4 Pak Hold Th Pak Hold fatur allows th mtr to capturs light pulss that ris or fall down to 10µs. 1. Prss and hold th PEAK button until CAL appars in th display. 2. Momntarily prss th PEAK button. Th PMAX icon will appar on th LCD. Th mtr will thn masur and display any light pulss. Th display will hold th rsults until a highr puls appars. 3. Prss th PEAK button again to display th PMIN valus. 4. To xit th Pak Hold mod, prss and hold th PEAK button until th PMAX or PMIN icon disappars. Rlativ mod Masurmnts can b displayd as a diffrnc btwn th masurd light lvl and a stord rfrnc valu. To stor a rading as a rfrnc, prss th REL button whn th dsird rfrnc masurmnt is on th LCD (th REL icon will switch on). All subsqunt displayd radings will b rlativ to th stord rfrnc valu. For xampl, if th rfrnc valu is 100 and th actual light lvl is 125, th mtr will display 25. To viw th rfrnc valu, prss th REL button again so that th REL icon bgins to flash. Th displayd valu will b th rfrnc valu. To xit th Rlativ mod, prss and hold th REL button until th REL icon disappars. RESET Prss th RESET button to clar th mmory and xit from REL, HOLD, PEAK and MAX/MIN. Th RESET will also rst th auto powr off timr. Backlight Prss th button to turn th backlight on. Prss again to turn it off. Maintnanc Claning and storag 1. Th whit plastic snsor dom should b cland with a damp cloth whn ncssary. Us only a mild soap if ndd. Do not us solvnts, abrasivs, or harsh dtrgnts to clan th dom. 2. Stor th mtr in an ara with modrat tmpratur and humidity (rfr to th oprating and storag rang in th Spcifications sction). Battry Rplacmnt Whn th battry powr bgins to fail th low battry symbol will appar on th LCD. Rplac th 9V battry by first rmoving protctiv jackt that ncass th mtr. Rmov th rar (cntr) battry compartmnt scrw to accss th battry compartmnt. Ensur that th compartmnt covr is scurly fastnd and that th protctiv jackt is proprly installd bfor using th mtr. 4

5 Spcifications Lux Rangs and Rsolution Accuracy 40.00, 400.0, 4000, 40.00k, 200.0kLux ± (5% Rdg + 0.5% Full Scal) Foot candl (Fc) 40.00, 400.0, 4000, 20.00kFc ± (5% Rdg + 0.5% Full Scal) Gnral Spcifications Display Multi-function 3-3/4 (3999) digit LCD with Bargraph indicator Ovr rang indication LCD displays OL Spctral rspons CIE photopic (CIE human y rspons curv) Spctral accuracy CIE V function (f 1 ï 6%) Masurmnt Rpatability ±2% Tmpratur cofficint ±0.1% pr o C Sampling rat 13.3 tims pr scond (bargraph); 1.3 tims pr scond (digital display) Photo dtctor Silicon photo-diod with spctral rspons filtr Pak Hold Captur light paks to 10µS Oprating conditions Tmpratur: 32 to 104 o F (0 to 40 o C); Humidity: < 80% RH Storag conditions Tmpratur: 14 to 140 o F (-10 to 50 o C); Humidity: < 80% RH Dimnsions 6.5 x 3.0 x 1.7" (165 x 76 x 43mm) Wight Approx oz. (403g) with battry installd Low battry indication appars on th LCD Powr supply 9V battry Calibration and Rpair Srvics Extch offrs rpair and calibration srvics for th products w sll. Extch also provids NIST crtification for most products. Call th Customr Srvic Dpartmnt for information on calibration srvics availabl for this product. Extch rcommnds that annual calibrations b prformd to vrify mtr prformanc and accuracy. Support lin (781) Tchnical support: Extnsion 200; support@xtch.com Rpair & Rturns: Extnsion 210; rpair@xtch.com Product spcifications subjct to chang without notic For th latst vrsion of this Usr s Guid, Softwar updats, and othr up-to-th-minut product information, visit our wbsit: Extch Instrumnts Corporation, 285 Bar Hill Rd., Waltham, MA Copyright 2006 Extch Instrumnts Corporation. All rights rsrvd including th right of rproduction in whol or in part in any form. 5

6 Appndix Typical Light Lvls Lux Foot Candls Lux Foot Candls Factoris Hom Emrgncy Stairs, Warhous Washing Exit/Entranc Passags Rcrational Activitis Packing Work Drawing Room, Tabl Visual Work: Production Lin Makup 750-1, Typstting: Inspction Work 500-1, Rading, Study 1,500-3, Elctronic Assmbly, Drafting 1,000-2, Swing Offic Rstaurant Indoor Emrgncy Stairs Corridor Stairs Corridor Stairs Entranc, Wash Room Confrnc, Rcption Room Cooking Room, Dining Tabl 750-1, Clrical Work 750-1, Show Window 1,500-2, Typing, Drafting Stor Hospital Indoors Emrgncy Stairs Corridor/Stairs Stairs Rcption Sick Room, Warhous Display Stand Waiting Room Elvator Mdical Exam Room 750-1, Show Window, Packing Tabl 750-1, Oprating Room 1,500-3, Storfront, Show Window 5,000-10, Ey Inspction Spctral Snsitivity R l a t i v R s p o n s Wavlngth (nm) Light Mtr Rspons CIE Rspons 6