User Manual

Table Of Contents

LT505-en-GB_V1.1 1/18

Introduction

Thank you for selecting the Extech Model LT505 LUX/FC Light Meter. The LT505 measures light

from fluorescent, metal halide, high-pressure sodium and incandescent sources in lux and foot-

candles. 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 and

translations of this User Manual, Product Updates, Product Registration, and Customer Support.

Features

 Measure intensity of light (illuminance) in lux or foot-candles

 Light sensor with cosine correction

 Low battery indicator

 Data hold

 Auto-ranging

 Auto Power OFF (APO)

 Light weight, compact, design

Safety

Please read the entire User Manual before operating this device. Use the meter only as specified

and do not attempt to service or open the meter housing.

 Do not use the meter in the presence of explosive gas or vapor

 Do not expose the meter to extremes in temperature or to high humidity

 Please dispose of batteries and meter responsibly and in accordance with all applicable

laws and regulations

 Do not allow children to handle the meter or the protective cover

Meter and LCD Description

1. Light Sensor (protective sensor cover not shown)

2. LCD

3. LUX-FC button

4. CAL-ZERO button

5. Power button

6. Data Hold button

7. MAX-MIN Record button

Note: Battery compartment and Tripod mount on rear of

meter