Extech Instruments LT10 User manual

USERGUIDE



PocketLightMeter



ModelLT10



Shop for Extech products at: 1.888.610.7664

ShopExtech.com

2LT10‐en‐GB_v1.14/15

Introduction



ThankyouforselectingtheExtechInstrumentsModelLT10PocketLightMeter.TheLT10measuresand

displayslightintensityinfootcandleandLuxunitsusingaprecisionphoto‐diodesensor.Thisdeviceis

shippedfullytestedandcalibratedand,withproperuse,willprovideyearsofreliableservice.Pleasevisitour

website(www.extech.com)tocheckforthelatestversionofthisUserGuide.TheExtechInstrumentsbrand,

awhollyownedsubsidiaryofFLIRSystems,Inc.,isISO‐9001certified.



Safety



UseCAUTIONwhenoperatingthisdevice.Thelightsensorissensitiveandshouldbehandledwithgreat

care.



MeterDescription



1. Photodetector(LightSensor):Sensorcontainsalonglifesilicon

photodiode

2. MAX‐LUX/fcfunctionbutton:Pressbuttonmomentarilytoview

themaximum(MAX)reading.Pressthebuttonmomentarily

againtoreleasetheMAXdisplayandreturntothenormal

operatingmode.Pressandholdthisbuttonforatleast2seconds

toswitchbetweenLUXandfc(footcandle)unitsofmeasure.

Notethat1fc=10.76LUX).

3. LCDBacklightControlSensor:ThemeterswitchestheLCD

backlightONandOFFautomaticallybasedonenvironmental

lightingconditions.

4. LCDdisplay:1999count,backlitLCDwithLUX,fc,MAX,andlow

batteryicons.

5. Powerbutton:PresstoswitchtheunitONorOFF.

Note:Batterycompartmentandtripodmountarelocatedonrearof

instrument.

Shop for Extech products at: 1.888.610.7664

ShopExtech.com

3LT10‐en‐GB_v1.14/15

Operation



TurnPowerONorOFF

Pressthebuttontoturnpoweronoroff.Ifthedisplaydoesnotswitchon,checkthata9Vbatteryis

installedandisfresh.

SelectingLUXorFootcandle(fc)unitsofmeasure

PressandholdtheMAX‐LUX/fcbuttonforatleast2secondstoswitchbetweenLUXandFcunits.

MeasurementProcedure

1. SwitchthemeterONandpositionthelightsensortocapturethelightthatistobemeasured.

2. ThedisplaywillindicatethelightlevelinFcorLUXunits.

3. Themeterautomaticallyselectsthecorrectrange.Ifthe‘OL’iconappears,thelightmeasurementisout

ofrangeandcannotbemeasuredaccurately.

4. Ifthex10orx100indicatorappears,multiplythedisplayedvaluebythecorrespondingmultiplierto

obtainthecorrectmeasurementvalue.

MaxHold

MomentarilypresstheMAX‐LUX/fcbuttontoviewthehighestreading(MAX)encounteredsincethemeter

waslastswitchedON.Pressthebuttonagaintoreturntothenormaloperatingmode.ToresettheMAX

reading,switchthemeterOFFandthenONagain.

LCDBacklight

ThemeterautomaticallycontrolstheLCDbacklighting(ONandOFF)tomatchtheavailableambientlighting.



Shop for Extech products at: 1.888.610.7664

ShopExtech.com

4LT10‐en‐GB_v1.14/15

BatteryReplacement



Whenthebatterypowerbeginstofail,thelowbatterysymbolwillappearontheLCD.Replacethe9V

batterybyfollowingthesesteps.

1. Opentherearbatterycompartmenttoaccessthebattery

2. Replacethe9Vbattery,carefullysecuringthebatteryinthecompartment

3. Securelyfastenthecompartmentcover

4. Ensurethatthecompartmentcoverissecurelyfastenedbeforeusingthemeter



AllEUusersarelegallyboundbytheBatteryOrdinancetoreturnallusedbatteriestocommunity

collectionpointsorwhereverbatteries/accumulatorsaresold.

Disposalinhouseholdtrashorrefuseisprohibited.

Disposal:Followthevalidlegalstipulationsinrespectofthedisposalofthedeviceattheendofits

lifecycle



BatterySafetyReminders

Pleasedisposeofbatteriesresponsibly;alwaysobservelocal,state,andfederalregulationswithregard

tobatterydisposal.

Neverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.

Nevermixbatterytypesoroldandnewbatteries.Alwaysinstallnewbatteriesofthesametype.







Shop for Extech products at: 1.888.610.7664

ShopExtech.com

5LT10‐en‐GB_v1.14/15

Specifications



GeneralSpecifications

Display1999CountBacklitLCDwithLUX,fc,battery,andMAXindicators

DisplayPolarityAutomaticallydetectspolarity;displays(‐)fornegativepolarity

OverrangeindicationLCDdisplays‘OL’

LowBatteryIndicationBatteryiconappearswhenbatteryvoltageisbelowoperatinglevel

Measurementrate2.5readingspersecond,nominal

MeasurementRepeatability±2%

MAXindicationDisplayshighestreading

Temperaturecoefficient±0.1%peroC

PhotodetectorSiliconphoto‐diodewithspectralresponsefilter

SensorCalibrationCalibratedtostandardincandescentlamp;colortemperature2856k

SpectralresponseCIEphotopic(CIEhumaneyeresponsecurve)

Powersupply9Vbattery

AutoPowerOffMeterautomaticallyswitchesoffafter17minutesofinactivity

OperatingconditionsTemperature:0to40oC(32to104oF);Humidity:<80%RH

StorageconditionsTemperature:‐10to60oC(14to140oF);Humidity:<80%RH

Dimensions157(H)x54(W)x34(D)mm(6.2x2.1x1.3")

Weight170g(6oz.)



ElectricalSpecifications

RangesandResolutionAccuracy

LUX±(5%reading+10digits(<10000LUX/fc)

±(10%reading+10digits(>10000LUX/fc)

Notethatreadingsover1999willshowthex10orx100multiplier.

Inthesecases,multiplythedisplayedvaluebythemultiplierto

obtainthecorrectreading.

200.0,2000,20000,40000

Footcandles(Fc)

20.0,200.0,2000,4000



Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

www.extech.com

Shop for Extech products at: 1.888.610.7664

ShopExtech.com

6LT10‐en‐GB_v1.14/15

Appendices

TypicalLightLevels

Lux Foot

Candles

Lux Foot

Candles

Factories

Homes

20-75 2-7 Emergency Stairs, Warehouse

100-150 10-15

Washing

75-150 7-15 Exit/Entrance Passages

150-200 15-20

Recreational Activities

150-300 15-30 Packing Wor

200-300 20-30

Drawing Room, Table

300-750 30-75 Visual Work: Production

Line

300-500 30-50

Makeup

750-1,500 75-150 Typesetting: Inspection Work

500-1,500 50-150

Reading, Study

1,500-3,000 150-300 Electronic Assembly, Drafting

1,000-2,000

100-200

Sewing

Office

Restaurant

75-100 7-10 Indoor Emergency Stairs

75-150 7-15

Corridor Stairs

100-200 10-20 Corridor Stairs

150-300 15-30

Entrance, Wash Room

200-750 20-75 Conference,

Reception Room

300-750 30-75

Cooking Room, Dining Table

750-1,500 75-150 Clerical Work

750-1,500 75-150

Show Window

1,500-2,000 150-2000 Typing, Drafting

Stores

Hospitals

75-150 7-15 Indoors

30-75 3-7

Emergency Stairs

150-200 15-20 Corridor/Stairs

75-100 7-10

Stairs

200-300 20-30 Reception

100-150 10-15

Sick Room, Warehouse

300-500 30-50 Display Stand

150-200 15-20

Waiting Room

500-750 50-75 Elevator

200-750 20-75

Medical Exam Room

750-1,500 75-150 Show Window,

Packing Table

750-1,500 75-150

Operating Room

1,500-3,000 150-300 Storefront, Show Window

5,000-10,000

500-1000

Eye Inspection

SpectralSensitivity

400 450 500 550 600 650 700

Wavelength (nm)

- - - - - Light Meter Response _____ CIE Response

0.8

0.6

0.4

0.2

Shop for Extech products at: 1.888.610.7664

ShopExtech.com

Table of contents

Other Extech Instruments Measuring Instrument manuals

Extech Instruments

Extech Instruments MA145 User manual

Extech Instruments

Extech Instruments AN510 User manual

Extech Instruments

Extech Instruments MO265 User manual

Extech Instruments

Extech Instruments 250W Series User manual

Extech Instruments

Extech Instruments 407114 User manual

Extech Instruments

Extech Instruments RPM10 User manual

Extech Instruments

Extech Instruments EC170 User manual

Extech Instruments

Extech Instruments ExStik FL700 User manual

Extech Instruments

Extech Instruments AM300 User manual

Extech Instruments

Extech Instruments HD400 User manual

Extech Instruments

Extech Instruments 407780A User manual

Extech Instruments

Extech Instruments 407706 User manual

Extech Instruments

Extech Instruments LT505 User manual

Extech Instruments

Extech Instruments EN510 User manual

Extech Instruments

Extech Instruments MA120 User manual

Extech Instruments

Extech Instruments 461891 User manual

Extech Instruments

Extech Instruments 451112 User manual

Extech Instruments

Extech Instruments MO55W User manual

Extech Instruments

Extech Instruments TKG100 User manual

Extech Instruments

Extech Instruments ExStik RE300 User manual

Extech Instruments

Extech Instruments CO240 User manual

Extech Instruments

Extech Instruments HD300-NISTL User manual

Extech Instruments

Extech Instruments 407790 User manual

Extech Instruments

Extech Instruments 445580 User manual

Popular Measuring Instrument manuals by other brands

Suaoki

Suaoki D40 user manual

Elster

Elster BK-G1.6 operating instructions

Endress+Hauser

Endress+Hauser Deltabar FMD71 technical information

Duratool

Duratool D03128 manual

Vega

Vega VEGAPULS 65 Quick setup guide

Tonghui

Tonghui TH2618B Operation manual

Tenmars

Tenmars TM-801 user manual

MSR

MSR 145 user manual

TPS

TPS WP-82 manual

ELMETRON

ELMETRON CP-511 user manual

PCB Piezotronics

PCB Piezotronics 003C30 Installation and operating manual

Tenma

Tenma 72-10465 manual

Endress+Hauser

Endress+Hauser Proline Promag 50 Brief operating instructions

Siemens

Siemens SITRANS F Coriolis FCT030 Function manual

KLINGER

KLINGER CMF V Series instruction manual

EXFO

EXFO FTB-2 Notice

Keysight

Keysight M8290A Getting started guide

ADTEK

ADTEK MW-5 operating manual