USER GUIDE Digital Light Mtr Modl LT300
Introduction Congratulations on your purchas of th Extch LT300 Digital Light Mtr. Th LT300 masurs light lvl (illuminanc) to 400,000 Lux (40,000 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. Plas visit our wbsit (www.xtch.com) to chck for th latst vrsion of this Usr Guid, Product Updats, and Customr Support. 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 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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
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
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. 4
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. Nvr dispos of usd battris or rchargabl battris in houshold wast. As consumrs, usrs ar lgally rquird to tak usd battris to appropriat collction sits, th rtail stor whr th battris wr purchasd, or whrvr battris ar sold. Disposal: Do not dispos of this instrumnt in houshold wast. Th usr is obligatd to tak nd of lif dvics to a dsignatd collction point for th disposal of lctrical and lctronic quipmnt. Othr Battry Safty Rmindrs o Nvr dispos of battris in a fir. Battris may xplod or lak. o Nvr mix battry typs. Always install nw battris of th sam typ. 5
Spcifications Lux Rangs and Rsolution Accuracy 40.00, 400.0, 4000, 40.00k, 400.0kLux ± (5% Rdg + 0.5% Full Scal) Foot candl (Fc) 40.00, 400.0, 4000, 40.00kFc ± (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 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: 0 to 40 o C (32 to 104 o F); Humidity: < 80% RH Storag conditions Tmpratur: 10 to 50 o C (14 to 140 o F); Humidity: < 80% RH Dimnsions 165 x 76 x 43mm (6.5 x 3.0 x 1.7") Wight Approx. 403g (14.2 oz.) with battry installd Low battry indication appars on th LCD Powr supply 9V battry Copyright 2013 FLIR Systms, Inc. All rights rsrvd including th right of rproduction in whol or in part in any form ISO 9001 Crtifid www.xtch.com 6
Appndix Typical Light Lvls Lux Foot Candls Lux Foot Candls Factoris Hom 20 75 2 7 Emrgncy Stairs, Warhous 100 150 10 15 Washing 75 150 7 15 Exit/Entranc Passags 150 200 15 20 Rcrational Activitis 150 300 15 30 Packing Work 200 300 20 30 Drawing Room, Tabl 300 750 30 75 Visual Work: Production Lin 300 500 30 50 Makup 750 1,500 75 150 Typstting: Inspction Work 500 1,500 50 150 Rading, Study 1,500 3,000 150 300 Elctronic Assmbly, Drafting 1,000 2,000 100 200 Swing Offic Rstaurant 75 100 7 10 Indoor Emrgncy Stairs 75 150 7 15 Corridor Stairs 100 200 10 20 Corridor Stairs 150 300 15 30 Entranc, Wash Room 200 750 20 75 Confrnc, Rcption Room 300 750 30 75 Cooking Room, Dining Tabl 750 1,500 75 150 Clrical Work 750 1,500 75 150 Show Window 1,500 2,000 150 2000 Typing, Drafting Stor Hospital 75 150 7 15 Indoors 30 75 3 7 Emrgncy Stairs 150 200 15 20 Corridor/Stairs 75 100 7 10 Stairs 200 300 20 30 Rcption 100 150 10 15 Sick Room, Warhous 300 500 30 50 Display Stand 150 200 15 20 Waiting Room 500 750 50 75 Elvator 200 750 20 75 Mdical Exam Room 750 1,500 75 150 Show Window, 750 1,500 75 150 Oprating Room Packing Tabl 1,500 3,000 150 300 Storfront, Show Window 5,000 10,000 500 1000 Ey Inspction Spctral Snsitivity R l a t i v R s p o n s 1 0.8 0.6 0.4 0.2 0 400 450 500 550 600 650 700 Wavlngth (nm) - - - - - Light Mtr Rspons CIE Rspons 7