USER MANUAL Digital Sound Level Meter Model SL510 Additional User Manual Translations available at www.extech.
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.
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.
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.
Peak Hold The Peak mode is used to capture and hold the peak sound level measurement. 1. Press the ▼ SET/PEAK button to enable the peak capture mode. The peak icon appear on the display. 2. The meter will now display the highest peak reading during the measurement period. 3. Press the ▼ SET/PEAK button to exit the peak capture mode will MAX-MIN Recording In this mode, the meter records the maximum and minimum values over time.
Calibration To calibrate the SL510, an external calibrator that can provide a 94.0dB signal at 1 kHz is required. 1. Turn the meter ON 2. Put the meter in the ‘A’ weighting mode. 3. Put the meter in the ‘FAST response mode. 4. Place the microphone into the calibrator. Set the calibrator to output a 1kHz sine wave @ 94dB. 5. When the reading is stable, simultaneously press and hold the A/C and Fast/Slow buttons until a second lower dB display appears. 6.
Specifications Display Backlit LCD Microphone 0.5” Electret condenser Input Overload Display “----“ Measurement Range 35 to 130dB Resolution 0.1dB Frequency weighting ‘A’ and ‘C’ (selectable) Accuracy / Resolution ± 1.0 dB @ 1kHz / 0.1dB Frequency 31.5 to 8000 Hz Response time Fast: 125 milliseconds / Slow: 1 second Calibration source required 1KHz sine wave @ 94dB Tripod mount On back of meter Power 3 x 1.5V AAA batteries Power Consumption Approx. 7.
Typical A-Weighted Sound Levels dBA 140 50HP Siren (100') Jet takeoff (200') Riveting machine 130 120 110 100 Subway (20') 90 Pneumatic drill (50') 80 Vacuum cleaner (10') 70 Large store 60 Small office 50 Night residential area 40 Whisper (5'0) 30 20 Chain saw Boiler room Freight train (100') Speech (1') Large Office Residence Sound studio 10 Threshold of hearing 0 Copyright © 2017 FLIR Systems, Inc.
