Extech Instruments LT10 User Manual

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 ope rating 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

Extech Instruments LT10 Specifications

General

Brand	Extech Instruments
Model	LT10
Category	Measuring Instruments
Language	English

Summary

Introduction and Safety

Safety Precautions

Handle the light sensor with care due to its sensitivity.

Meter Description

Details the components of the Pocket Light Meter, including the photo detector, buttons, and display.

Operation

Powering On/Off and Unit Selection

How to turn the meter on/off and switch between LUX and Foot Candle units.

Measurement Procedure

Step-by-step guide for taking light measurements, including range and multiplier indicators.

Max Hold and LCD Backlight

Using the Max Hold function and understanding automatic LCD backlight control.

Battery Replacement and Disposal

Battery Safety Reminders

Important safety guidelines for battery handling and disposal.

Specifications

General Specifications

Details general characteristics such as display, measurement rate, power, and dimensions.

Electrical Specifications

Provides ranges, resolution, and accuracy for LUX and Foot candles.

Appendices

Typical Light Levels

Provides typical light level values in Lux and Foot Candles for various environments.

Spectral Sensitivity

Graph illustrating the light meter's response compared to the CIE response.