Product Description

Lutron SL-4012 Sound Level Meter

This sound meter is an ideal tool for everyday use such as measuring the sound level in crowded places, engine noise and industrial Combustion system noise. or even different environmental sounds.

Features Lutron SL-4012 Sound Level Meter

Large LCD display, easy to read.
The frequency weighted network is designed to comply with IEC 61672 class 2.
Auto range & mammal range.
A&C weighting network according to standard.
Fast & Slow dynamic characteristic mode.
AC output for system expansion.
RS232/USB computer interface.
Build in adj. VR is available for easy calibration.
Hold & Record memory (max., min.)
Condenser microphone for high accuracy & stability.
Peak Hold function to store the maximum value.
Warning indicator for over and under load.
LCD display for low power consumption & clear reading even in bright ambient light conditions.
Using durable and long-lasting components, including a tough lightweight ABS plastic casing.
Compact and lightweight plastic housing.

Specifications Lutron SL-4012 Sound Level Meter

Display: 52 mm x 32 mm LCD (Liquid Crystal Display), 5 digits.
Functions: dB (A & C frequency weighted), Time weighted (Fast, Slow), Hold,
Memory (max. & min.), peak hold, AC & RS232 output.
Measurement Range: 30 – 130 dB.
Resolution: 0.1 dB.
Accuracy: The frequency weighting complies with IEC 61672 class 2, calibrating the input signal at 94 dB(31.5 Hz to 8 kHz), then the frequency weighting accuracy is determined as follows:

31.5 Hz – ± 3.5 dB, 63 Hz – ± 2.5 dB, 125 Hz – ± 2.0 dB
250 Hz – ±1.9 dB, 500 Hz – ±1.9 dB, 1 kHz – ±1.4 dB
2 kHz – ± 2.6 dB, 4 kHz – ± 3.6 dB, 8 kHz – ± 5.6 dB

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 – Characteristics close to a “FLAT” response. Typical, suitable for checking engine noise (Q.C. check) & knowing the sound pressure level of the equipment under test.

Frequency: 31.5 Hz to 8,000 Hz.
Calibrator: B & K (Bruel & kjaer), multifunction acoustic calibrator, model: 4226.
Microphone type: Electric condenser microphone.
Microphone size: standard 1/2 inch size.
Range selector:

* Auto range: 30 to 130 dB.
* Manual range: 3 ranges, 30 to 80 dB, 50 to 100 dB, 80 to 130 dB, 50 dB at each step, with over & under range indication.

Time Weighting (Fast & Slow): Fast – t= 200 ms, Slow – t = 500 ms,

* “Fast” range simulated human ear response time weight.
The “slow” range is easy to get an average value of sound vibration level.
* The “Fast” & “Slow” time weighting ranges are designed for IEC 61672 class 2 requirements.

Output Signal:

* AC Output – AC 0.5 Vrms corresponding to each step of the range.
Output impedance – 600 ohms.
* RS232 output.

Output terminals:

Terminal 1 : RS232 computer interface terminal.
Terminal 2 : AC output terminal.
* Terminal socket size: 3.5mm diameter. telephone socket.

VR Calibration: Build in external calibration VR, easily calibrated at 94 dB level by screwdriver.
Operating Temperature: 0℃ to 50℃(32℉ to 122℉).
Operating Humidity: Less than 80% RH.
Power Supply: 006P DC 9V Battery (Alkaline type or heavy duty).
Power Consumption: Approx. DC 6mA.
Dimensions: 268 x 68 x 29 mm ( 10.6 x 2.7 x 1.1 inches).
Weight: 295 g/0.65 lb.