Lutron SL-4012 – Sound Level Meter

SPECIFICATIONS

Display

52 mm x 32 mm LCD (Liquid Crystal Display), 5 digits.

Function

dB (A & C frequency weighting), Time weighting(Fast, Slow), Hold, Memory ( max. & min. ), Peak hold, AC & RS232 output.

Measurement Range

30 – 130 dB.

Resolution

0.1 dB.

Accuracy (23 ± 5 °C)

Frequency weighting meet IEC 61672 class 2, calibrating input signal on 94 dB(31.5 Hz to 8 kHz), then the accuracy of frequency weighting is specified as following:

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

Frequency Weighting Network

Characteristics of A & C.

A weighting – The characteristic is simulated as “Human Ear Listing” response. Typical, if making the environmental sound level measurement, always select to A weighting.

C weighting – The characteristic is near the “FLAT” response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment.

Frequency

31.5 Hz to 8,000 Hz.

Calibrator

B & K (Bruel & kjaer), multi-fuction acoustic calibrator, model : 4226.

Microphone type

Electric condenser microphone.

Size of microphone

1/2 inch standard size.

Range selector

Auto range : 30 to 130 dB.

Manual range : 3 range, 30 to 80 dB, 50 to 100 dB, 80 to 130 dB, 50 dB on each step, with over & under range indicating.

Time Weighting (Fast & Slow)

Fast – t= 200 ms, Slow – t = 500 ms,
* “Fast” range is simulated the human ear response time weighting.

“Slow” range is easy to get the average values of vibration sound level.
* The “Fast” & “Slow” time weighting range are designed to IEC 61672 class 2 requirement.

Output Signal

* AC output – AC 0.5 Vrms corresponding to each range step. Output impedance – 600 ohm.

* RS232 output.

Output terminal

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

Calibration VR

Build in external calibration VR, easy to calibrate on 94 dB level by screw driver.

Operating Temp.

0 °C to 50 °C ( 32°F to 122°F ).

Operating Humidity

Less than 80% RH.

Power Supply

006P DC 9V battery ( Alkaline or heavy duty type ).

Power Consumption

Approx. DC 6mA.

Dimension

268 x 68 x 29 mm ( 10.6 x 2.7 x 1.1 inch).

Weight

295 g/0.65 LB.

Standard Accessories

Instruction Manual ………………………………………..1 PC.

Optional

Sound Calibrator, model : SC-934 ( 94/104/114 dB ).
SC-942 ( 94dB, 114 dB ).
Carrying case : CA-06
RS232 cable, Model : UPCB-02
USB cable, Model : USB-01

Application software, Model : SW-U801-WIN