Lutron SL-4022 – Sound Level Meter

SPECIFICATIONS

Display

1 8 mm (0.7″) LCD (Liquid Crystal Display), 3 1/2 digits.

Function

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

Measurement Range

3 ranges ( 30 – 70 dB, 60 – 100 dB, 90 – 130 dB ),

Resolution

0.1 dB.

Accuracy (23 ± 5 °C)

Frequency weighting meet IEC 61672 Class 1, calibrating input signal on 94 dB the accuracy of frequency weighting is specified as following:

31.5Hz:± 2.0dB,63Hz:± 1.5dB,125Hz:± 1.5dB, 250Hz:± 1.4dB,500Hz:± 1.4dB,1KHz:± 1.1dB, 2KHz:± 1.6dB,4KHz:± 1.6dB,8KHz:+2.1dBto-3.1dB,

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 16 KHz. * Accuracy is tested within 31.5 Hz to 8 KHz.

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 70 dB, 60 to 100 dB, 90 to 130 dB, 40 dB on each step, with over & under range indicating.

Time Weighting Fast & Slow
(F & S )

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 1 requirement.

Output Signal

AC output – AC 750 mVrms corresponding to each range step.

Calibration

Build in external calibration VR, easy to calibrate on 94 dB level by screw driver. Internal oscillation system, 1 KHz sine wave generator.

Output Terminal

3.5 mm dia. 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

DC 9V battery x 2 PCs, 006P, MN1604 ( PP3 ) or equivalent, heavy duty or alkaline type.

Power Consumption

Approx. DC 17 mA.

Dimension

260 x 87 x 36 mm ( 10.2 x 3.4 x 1.4 inch ).

Weight

450 g/0.99 LB

Standard Accessories

Instruction Manual…………………………………………………………………………………. 1 PC.
Calibration screw driver……………………………………………………………………………………. 1 PC.
Carrying case………………………………………………………………………………………. 1 PC.

Optional Accessories

94/104/114 dB Sound Calibrator, model : SC-934.
94/114 dB Sound Calibrator, model : SC-942.
Wind shield ball, model : SB-01.