Extech Instruments LT510 User manual

USER MANUAL

Light Meter

Model LT510

Additional User Manual Translations available at

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Introduction

Thank you for selecting the Extech Model LT510. The LT510 measures light intensity in foot-candles

and Lux units. This device is shipped fully tested and calibrated and, with proper use, will provide

years of reliable service. Please visit our website ( ) to check for the latest version

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

Support.

Features

• Light sensor with cosine correction filter

• Backlit LCD

• Light weight, compact, design

Safety

Please read the entire Quick Start and 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 allow children to

handle the meter or the protective cover. Please dispose of batteries and meter responsibly and in

accordance with all applicable laws and regulations.

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Meter Description

1. Light Sensor

2. LCD Display

3. ON-OFF button

4. LCD Backlight button and ▲button

5. Units button

6. Hold button

7. Max/Min Record button

8. SET and ▼button

9. ZERO button

Note: Protective sensor cover not shown. Battery

compartment and Tripod mount

on rear

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Operation

1. Power the meter by pressing the power button. The meter will begin displaying light

intensity readings. If the LCD does not switch on, check the batteries located in the rear

battery compartment.

2. Remove the sensor cover.

3. Aim the light sensor at the light source for the most accurate readings.

4. View the measurement on the meter’s LCD

Unit Button

Press the UNIT button to select Lux or Ft-cd. The units will be indicated in the display.

Zero Function

To zero the display, place the light sensor cover over the sensor and press the ZERO button.

Data Hold

Short press the hold (H) button to freeze or unfreeze a reading on the display. The Hold function

is not operational in record mode.

Backlight

The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. Press the

backlight button to turn the backlight on. The backlight will automatically turn off after 10

seconds.

MAX-MIN Recording

In this mode, the meter records the maximum and minimum values over time.

Note: The Hold and Power buttons are not operational in the Record mode.

1. Short press the Rbutton to enter the Record mode. The record icon will appear on the

display. The maximum and minimum values will be recorded and updated during the

measurement period.

2. Short press the Rbutton to stop the Max-Min recording. The icon and the MAX value

that occurred during the recording period will be displayed.

3. Short press the Rbutton to display the icon and MIN value that occurred during the

recording period.

4. Press the Hbutton to clear the memory and start a new max/min measurement period.

5. Long press the Rbutton for to exit the record mode.

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Auto Power OFF (APO)

In order to conserve battery life, the meter will automatically shut off after approximately 10

minutes of inactivity. The APO icon appears in the display when APO is selected.

To turn APO ON or OFF as the default condition:

1. Long press the ▼/SET button. The lower display will show ‘PoFF’.

2. Short press the ▲or ▼button to enable APO (YES) or disable APO (NO) as shown in the

upper display.

3. Short press the Rbutton to save the selection.

4. The meter will return to normal operating mode after approximately 10 seconds or by

pressing the power button.

Maintenance

Battery Replacement

1. Power OFF the meter.

2. Remove the flat head screw that secures the battery compartment at the back of the

meter.

3. Open the battery compartment and replace the 3 AAA batteries observing correct polarity.

Re-assemble the meter before use

Safety: Please dispose of batteries responsibly; never dispose of batteries in a fire, batteries may

explode or leak. If the meter is not to be used for 60 days or more, remove the battery and store

separately.

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 instrument 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.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or

solvents.

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Specifications

Display Backlit LCD 35 x 30mm (1.38 x 1.18”)

Light sensor Photo sensor with cosine correction filter

Measurement Units LUX and Ft-cd (Foot – Candle)

Input Overload Display “----“

Tripod mount On back of meter

Power 3 x 1.5V AAA batteries

Power Consumption Approx. 5mA DC

Automatic power off After approx. 10 minutes of inactivity

Operating temperature 0 to 50oC (32 to 122oF)

Operating humidity 80% RH max

Storage temperature -10 to 60oC (14 to 140oF)

Storage humidity 10 to 75% RH

Dimensions/weight 141 x 57 x 25mm (5.5 x 2.3 x 1.1”) /136g (4.8oz)

Electrical Specifications (23±5°C)

Lux (autorange)

Unit Range Resolution Accuracy

Lux 0 to 2,200 1

±5%rdg ±8dgt

1,800 to 20,000 10

Ft-cd (autorange)

Unit Range Resolution Accuracy

Ft-cd 0 to 204.0 0.1

±5%rdg ±8dgt

170 to 1,860 1

ISO-9001 Certified

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