LUTRON SL-4022 Sound Level Meter

LUTRON SL-4022 Sound Level Meter

Overview

The LUTRON SL-4022 is a high-precision digital sound level meter designed for accurate noise measurement in a variety of environments. It features A & C frequency weighting networks that comply with IEC 61672 Class 1 standards, making it suitable for professional use in industrial, environmental, and safety applications. The meter offers a large, easy-to-read LCD display, low power consumption, and a lightweight yet durable ABS-plastic housing. Key features include a Max Hold function to store peak values, overload indicators, and fast/slow dynamic response modes for versatile sound measurement.

Key Features:

• A & C frequency weighting networks conform to IEC 61672 Class 1 standards.
• Max Hold function for storing maximum readings on display.
• Overload indicators for over and under load conditions.
• Large LCD display with low power consumption, ensuring clarity even in bright ambient light.
• Fast and Slow dynamic modes for capturing rapid sound fluctuations or averaged levels.
• AC output for system expansion and external device connections.
• Condenser microphone for high accuracy and long-term stability.
• Lightweight ABS-plastic housing, designed for durability.
• Low battery indicator and reset switch for Max Hold.

LUTRON SL-4022 Sound Level Meter Technical Specifications:

• Display: 18 mm (0.7″) LCD, 3 1/2 digits
• Measurement Range: Three selectable ranges (30 – 70 dB, 60 – 100 dB, 90 – 130 dB)
• Resolution: 0.1 dB
• Accuracy: Frequency weighting meets IEC 61672 Class 1 with the following specific accuracies at 94 dB input:
  • 31.5 Hz: ± 2.0 dB
  • 63 Hz: ± 1.5 dB
  • 125 Hz: ± 1.5 dB
  • 250 Hz: ± 1.4 dB
  • 500 Hz: ± 1.4 dB
  • 1 KHz: ± 1.1 dB
  • 2 KHz: ± 1.6 dB
  • 4 KHz: ± 1.6 dB
  • 8 KHz: +2.1 dB to -3.1 dB
• Time Weighting:
  • Fast: t = 200 ms (simulates human ear response)
  • Slow: t = 500 ms (for averaging sound levels)
• Frequency Range: 31.5 Hz to 16 KHz
• Output Signal: AC output of 750 mVrms corresponding to each range step
• Microphone: 1/2″ condenser microphone
• Operating Temperature: 0 to 50°C (32 to 122°F)
• Power Supply: Two 9V batteries (DC 9V)
• Dimensions: 260 x 87 x 36 mm (10.2 x 3.4 x 1.4 inches)
• Weight: 450 g (0.99 lbs)

Accessories:

• Standard: Instruction manual, calibration screw driver, carrying case.
• Optional: SC-941 and SC-942 sound calibrators for 94 dB and 114 dB, wind shield ball (SB-01).

Calibration and Accuracy

The SL-4022 supports external calibration via a built-in adjustment VR and is compatible with Bruel & Kjaer 4226 multifunction acoustic calibrator. It ensures precise measurement and long-term reliability, making it ideal for professionals in sound measurement tasks.

Optional Sound Calibrators:

• Model SC-941: Provides 94 dB at 1000 Hz ± 2%.
• Model SC-942: Offers both 94 dB ± 0.75 dB and 114 dB ± 0.9 dB at 1000 Hz.

This robust and versatile sound level meter offers reliability and compliance with international standards, ideal for professionals in acoustics, safety, and environmental fields.