Extech Instruments LT40

LT40-en-GB_V3.0 10/17
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MeasurementConsiderationsandUserTips
 For maximum accuracy allow the light being measured to fall directly on the sensor as
perpendicularaspossiblewithaminimalangleofincidence.


 Whenthemeterisnotinuse,pleasekeeptheprotectivecapinplaceoverthelightsensor.This
willprolongthelifeofthesensor.
 Whenthe meteristo bestored forlongperiods,pleaseremovethebatteriesand storethem
separately.Batteriescanleakandcauseda
magetothemeter’scompone
nts.
 Avoidareasofhightemperatureandhumiditywhenusingthisinstrument.

BatteryReplacementandMaintenance
Cleaningandstorage
1. Thewhiteplasticsensordomeshouldbecleanedwithadampclothwhennecessary.Use
onlyamildsoapifneeded.Donotusesolvents,abrasives,orharshdetergentstocleanthe
dome.
2. Storethemeterinanareawithmoderatetemperatureandrelativehumidity.
BatteryReplacement
Whenthebatterypowerdecreasestoacriticallevel,thelowbattery
symbol“
”willappearontheLCD.Replacethe2x1.5VAAA
batterieslocatedintherearbatterycompartment.
1. Pressandholdthebatterycompartmentlockbutton(seediagram).
2. Slidethebatterycompartmentcoveroffinthedirectionofthe
arrow.
Installtwo(2)1.5V‘AAA’batteriesobservingcorrectpolarityandclose 
thebatterycompartment.Ensurethatthecompartme
ntcoverissecurely
fastenedbeforeusingthemeter.

Neverdisposeofusedbatteriesorrechargeablebatteriesin
householdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate
collectionsites,theretailstorewhere thebatterieswerepurchased,orwherever
batteriesaresold.
Disposal:Donotdisposeofthisin
strumentinhouseholdwaste.Theuserisobligatedtotake
end‐of‐lifedevicestoadesignatedcollectionpointforthedisposalofelectricalandelectronic
equipment.
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