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Product Overview & Compliance:
The Lutron Model SL-4001 Sound Level Meter is a professional instrument designed for high accuracy sound level measurement, adhering to IEC 651 type 2 standards. Manufactured under ISO-9001 certification and marked with CE and IEC1010 compliance, this meter is reliable for various acoustic monitoring applications. It is built with durable, long-lasting components housed within a strong, light weight ABS-plastic casing, supporting easy one-hand operation due to its small and portable design.
Advanced Measurement Capabilities:
The SL-4001 offers versatile operational functions including A and C frequency weighting, Max. hold, and selectable Fast and Slow time weighting modes.
• Frequency Weighting:
◦ A Weighting: This characteristic is simulated to match the "Human Ear Listing" response and is typically selected when making environmental sound level measurements.
◦ C Weighting: This characteristic is near the "FLAT" response, making it suitable for checking the noise of machinery (Quality Control checks) and determining the sound pressure level of tested equipment.
• Time Weighting (Fast & Slow):
◦ Fast (t = 200 ms): Simulates the human ear response time weighting.
◦ Slow (t = 500 ms): Makes it easier to obtain the average values of vibration sound level.
• High Accuracy Microphone: The unit utilizes an electric condenser microphone (1/2 inch standard size) known for its high accuracy and long-term stability.
• Calibration: The meter includes a built-in adjustable VR for easy external calibration using a screw driver, supported by an internal oscillation system generating a 1 KHz sine wave.
System Integration and Display:
The SL-4001 features an 18mm (0.7") LCD display (3 1/2 digits) which provides a clear read-out even in bright ambient light conditions and features low power consumption. Essential functions include a Max. Hold feature to store the maximum measured value on display, and a warning indicator for over and under load conditions.
For system expansion, the unit provides AC/DC output capabilities via a 3.5 phone output terminal. This allows connection to an analyzer, level recorder, or tape recorder for data logging and detailed analysis.
Technical Specifications (Model SL-4001):
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Feature
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Specification
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Model
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SL-4001 (Lutron Electronic)
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Compliance
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IEC 651, Type 2; ISO-9001; CE; IEC1010
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Display
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18mm (0.7") LCD, 3 1/2 digits
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Measurement Range
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30 dB to 130 dB (3 ranges)
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Range Steps
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30 to 80 dB, 50 to 100 dB, 80 to 130 dB (50 dB steps)
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Resolution
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0.1 dB
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Frequency Range
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31.5 Hz to 8,000 Hz
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Frequency Weighting
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A and C networks
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Time Weighting
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Fast (200 ms) and Slow (500 ms) dynamic characteristics
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Microphone
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Electric condenser microphone, 1/2 inch standard size
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Accuracy
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Meets IEC 651 type 2 standards (e.g., ± 1.5 dB at 500 Hz to 1 kHz for A weighting)
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Output Signal (AC)
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0.5 Vrms corresponding to each range step
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Output Signal (DC)
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0.3 to 1.3 VDC (10 mV per dB)
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Output Impedance
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600 ohm
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Operating Temperature
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0 ℃ to 50 ℃ (32 ℉ to 122 ℉)
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Operating Humidity
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Less than 80% RH
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Power Supply
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006P DC 9V battery (heavy duty type)
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Power Consumption
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Approx. DC 6mA
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Dimensions
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205 x 80 x 35 mm (8.1 x 3.2 x 1.4 inch)
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Weight
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280 g / 0.62 LB (including battery)
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Included and Optional Accessories:
Standard Accessories:
• Instruction Manual
• Calibration screw driver
Optional Accessories (Sound Calibrators):
• 94 dB Sound Calibrator, Model: SC-941
• 94 dB/114 dB Sound Calibrator, Model: SC-942
• Compatible with B & K (Bruel & kjaer) multi-function acoustic calibrator, model: 4226
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