Extech SL510 Instruction Manual

Digital Sound Level Meter

Model SL510

Additional User Manual Translations available at www.extech.com

USER MANUAL

2

Introduction

Thank you for selecting the Extech Model SL510. The SL510 measures sound levels in decibels. 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

• Standard 0.5” microphone head

• A/C frequency weighting

• LCD with backlight

• Light weight, compact design

• Wristlet for convenient, one-handed operation

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 windscreen. Please dispose of batteries and meter responsibly and in
accordance with all applicable laws and regulations.

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Meter Description

1. Microphone with windscreen

2. LCD Display

3. ON-OFF button

4. LCD Backlight button and ▲ button

5. A/C weighting selection button

6. Hold button

7. Max/Min Record button

8. SET, Peak capture and ▼ button

9. Fast/Slow response selection button

Measurement Considerations

1. Wind blowing across the microphone increases the noise measurement. Use the supplied

windscreen to cover the microphone when applicable.

2. Calibrate the instrument before each use if possible. Especially if the meter has not been

used for a long period of time.

3. Do not store or operate the instrument in areas of high temperature or humidity.

4. Keep meter and microphone dry.

5. Avoid severe vibration.

6. Remove the battery when the meter is to be stored for long periods of time.

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Operation

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

level readings. If the LCD does not switch on, check the batteries located in the rear battery
compartment.

2. Hold the meter in hand facing the microphone toward the source of the sound to be

measured.

3. View the measurement on the meter’s LCD.

‘A’ and ‘C’ Frequency Weighting

Press the A/C button to select A or C frequency weighting. The A or C icon will appear in the
display to indicate the weighting selected.

With ‘A’ weighting selected, the frequency response of the meter is similar to the response of
the human ear. ‘A’ weighting is commonly used for environmental or hearing conservation
programs such as OSHA regulatory testing and noise ordinance law enforcement. ‘C’ weighting is
a much flatter response and is suitable for the sound level analysis of machines, engines, etc.

Most noise measurements are performed using 'A' Weighting and FAST Response.

‘FAST’ and ‘SLOW’ Time Weighting

Use the button to select FAST (125 ms) or SLOW (1 second) time weighting. The F or S icon
will appear in the display as selected.

Select FAST to capture noise peaks and noises that occur very quickly. Select the SLOW response
to monitor a sound source that has a consistent noise level or to average quickly changing levels.

Select FAST response for most applications.

Data Hold

To freeze a displayed reading, press the H button. The H icon will appear and the most recent
reading will appear in the display. Press the H button to exit the mode and return to normal
operation

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.

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