Product Description

Lutron SL-4035SD Integrating Sound Level Meter

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Frequency and Time weighting is designed to comply with IEC 61672 class 2.

Innovation and easy operation, the computer doesn’t need to prepare extra software, after running the datalogger, just take out the SD card from the meter and plug the SD card into the computer, it can download all measured values with time information (year/month/date/hour/minute /sec ) to Excel directly, then users can make further data or chart analysis by themselves.

Features Lutron SL-4035SD Integrating Sound Level Meter

The meter with programmable integration time provides precise linearity over a wide range (100dB) and features Leq and SPL measurements
The A&C weighting network is standard compliant
Standard 0.5″ microphone head
Time-weighted dynamic characteristics mode (Fast & Slow)
Build external calibration VR
Auto range & Manual range selection
Condenser microphone for high accuracy & long term stability
Memory function to store Max. & Min. mark
Hold and Peak Hold function
Real-time SD memory card datalogger, Built-in Clock and Calendar, real-time data recorder, sampling time is set from 1 second to 3600 seconds
Manual data logger is available (set sampling time to 0 seconds), as long as running manual datalogger function, it can set position(location) No. ( position 1 to position 99 ) are different
SD card capacity: 1GB to 16GB
LCD with green backlight, easy to read
Can auto power off or manual power off
Data storage, record max. and min. reading
Microcomputer circuit, high accuracy
Powered by UM3/AA ( 1.5 V ) x 6 batteries or 9V DC adapter
RS232/USB PC PC interface
Heavy duty & compact housing case. Leq, SPL, MAX-S, and MIN-S measurements

Specifications Lutron SL-4035SD Integrating Sound Level Meter

Circuit	Custom one-chip LSI microprocessor circuit
Display	LCD size : 52 mm x 32 mm LCD with green backlight (ON/OFF)
Measurement Type	SPL : Sound pressure level Leq : Equivalent Continuous Noise Level
Measurement Range	30 – 130 dB
Resolution	0.1 dB
Function	dB (frequency weighting A & C) Time weighting (Fast, Slow) Peak hold, Data hold Record (Max., Min.)
Accuracy	* The characteristic of the frequency weighted network “A” complies with IEC 61672-1-2013 class 2 * Under 94 dB input signal, the accuracy is: 31.5 Hz ± 3.0 dB 63 Hz ± 2.0 dB 125 Hz ± 1.5 dB 250 Hz ± 1.5 dB 500 Hz ± 1.5 dB 1 KHz ± 1.0 dB 2 KHz ± 2.0 dB 4 KHz ± 3.0 dB 8 KHz ± 5.0 dB
Remarks : Specifications above. tested in an RF Field Strength environment less than 30 MHz only
Frequency Weighting Network	Characteristics A & C. Weighting : Characteristics are simulated in response to “Human Ear Listing”. Usually, when measuring environmental noise levels, always select the A weighting. C weighting : Characteristic close to “FLAT” response. Typical, suitable for checking engine noise (Q.C.check) & knowing the sound pressure level of the equipment being tested.
Peak hold	To maintain the peak measured value (max.)
Data storage	To freeze measurement values
Time weighting (FAST & SLOW)	Fast – t = 125 ms The “Fast” range is simulated by weighting human ear response times. Slow – t = 1 s The “Slow” range is easy to get the average value of the sound vibration level.
Range selector	Auto range: 30 to 130 dB Manual range: 2 ranges, 30 to 80 dB, 80 to 130 dB, 50 dB at each step, with over & under range indication
Frequency	31.5 to 8000 Hz
Microphone type	Electric condenser microphone
Microphone size	Outer size, DIA 12.7 mm. (1/2 inch)
VR Calibration	Build in external calibration VR, easily calibrated at 94 dB level by screwdriver
Calibrator	B & K (Bruel & kjaer), MULTIFUNCTIONAL ACOUSTIC CALIBRATOR Type 4226
Datalogger Sampling Timing Range	Auto: 1 second to 3600 seconds Manual: Press data logger button once will save data once
Memory Card	SD memory card. 1GB to 16GB
Advanced settings	Set clock time (Year/Month/Date, Hour/Minute/Second) Set sampling time Auto shutdown management Set Beep sound ON/OFF SD card setting decimal point Format SD memory card Frequency weighting to setting A or C
More Indication	Show ” – – – -“
Data Store	Freezes display reading
Memory Retention	Maximum & Minimum Values. (for SPL)
Display Sampling Time	Approx. 1 second
Data Output	PC PC RS 232/USB interface
AC output	0.5 Vrms AC per step of the range. * Output impedance: 600 ohms
Power off	Automatic power off saves battery life or manual power off at the push of a button
Operating Temperature	0 to 50℃
Operating Humidity	Less than 85% R.H
Power Supply	Alkaline or heavy duty DC 1.5 V batteries ( UM3, AA ) x 6 PCs, or equivalent DC 9V adapter input. (AC/DC power adapter is optional)
Power Current	Normal operation (no SD card save data and LCD Backlight OFF)
Approximately. DC 12 mA	When SD card saves data but and LCD Backlight is OFF): Approx. DC 51 mA If the LCD backlight is on, the power consumption will increase by approx. 30 mA
Weight	489 g/1.08 lb
Dimensions	245 x 68 x 45mm. (9.6×2.7×1.9 inches)