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Extech Instruments LT505

Extech Instruments LT505
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USER MANUAL
LUX/FC Light Meter
Model LT505
Additional User Manual Translations available at www.extech.com
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Extech Instruments LT505 Specifications

General IconGeneral
TypeLight Meter
Light SourceLED
Resolution0.01 Lux
Resolution (alternative)1 lux (0 to 9, 999 lux), 10 lux (10, 000 to 50, 000 lux)
DisplayLCD
Display Digits4 digits
Data HoldYes
Auto Power OffYes
SensorSilicon Photo Diode with Filter
Sampling Rate2.5 times per second
Battery9V battery (included)
Operating Temperature32°F to 122°F (0°C to 50°C)

Summary

Introduction

Features

Safety

Meter and LCD Description

Operation

Meter Power

Instructions for powering the meter on and off.

Zero Calibrate the Sensor

Procedure for calibrating the sensor to zero.

Taking Measurements

How to aim the sensor and view measurements.

Selecting the Unit of Measure

How to toggle between Lux and Foot-candles.

Data Hold

How to freeze or unfreeze readings.

MAXMIN Button

Using the MAXMIN Button

Explains tracking maximum, average, and minimum readings.

Auto Power OFF (APO)

Measurement Considerations and User Tips

Perpendicular Measurement

Ensure light falls perpendicularly on the sensor for accuracy.

Sensor Protection and Storage

Protect sensor, remove batteries for long-term storage.

Maintenance

Battery Replacement

Procedure for replacing the meter's batteries.

Cleaning and Storage

Guidelines for cleaning the meter and proper storage.

Specifications

Electrical Specifications

Appendices

Typical Light Levels

Examples of typical light levels in various environments.

Spectral Sensitivity

Information on the meter's spectral sensitivity.

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