Lutron SL-4011 – Sound Level Meter

SPECIFICATIONS

Display

18mm (0.7″) LCD (Liquid Crystal Display), 3 1/2 digits.

Function

dB (A & C frequency weighting), Time weighting(Fast, Slow), Max. hold, AC & DC output.

Measurement Range

3 ranges, 30 to 130 dB, input signal only.

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

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.

Calibration

* Build in external calibration VR, easy to calibrate by external screw driver. AC output – AC 0.5 Vrms corresponding to each range step.
DC output – DC 0.3 to 1.3 VDC, 10 mV per dB.
Out put impedance – 600 ohm.

Output Signal

Output terminal

3.5 mm phone output terminal is provided for connection with analyzer, level recorder, tape recorder.

Operating Temp.

0 °C to 50 °C ( 32 °F to 122 °F ).

Operating Humidity

Less than 80% RH

Power Supply

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

Power Consumption

Approx. DC 6mA.

Dimension

255 x 70 x 28 mm (10.0×2.8×1.1 inch).

Weight

280 g/0.62 LB (including battery).

Standard Accessories

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

Optional Accessories

 94/104/114 dB Sound Calibrator, Model : SC-934.

94 dB/114 dB Sound Calibrator, Model : SC-942.

Hard carrying case, Model : CA-06.