SOUND LEVEL METER – Model: SL-4022 精密型噪音計

Technical Specifications:

– Display: 

  – Type: LCD (Liquid Crystal Display)

  – Size: 18 mm (0.7″) digits, 3 1/2 digits

– Measurement Functions:

  – Sound Pressure Level (SPL):

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

    – Resolution: 0.1 dB

    – Accuracy: 

      – Frequency weighting meets IEC 61672 Class 1 standards, with calibrating input signal on 94 dB

      – 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

  – Frequency Characteristics:

    – A weighting: Simulates human ear response, ideal for environmental sound level measurement

    – C weighting: Near “FLAT” response, suitable for checking machinery noise and sound pressure levels

    – Frequency range: 31.5 Hz to 16 kHz

– Functions:

  – Max hold function for storing the maximum value on display

  – Max hold reset switch

  – AC output for system expansion

  – Low battery indicator

– Calibration: 

  – Built-in external calibration VR, easy to calibrate at 94 dB level using a screwdriver

  – Internal oscillation system with 1 kHz sine wave generator

– Output Terminal: 3.5 mm diameter phone output terminal

– Operating Environment:

  – Temperature: 0 to 50℃ (32 to 122℉)

  – Humidity: Less than 80% RH

– Power Supply: 

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

  – Power Consumption: Approx. DC 17 mA

– Dimensions: 

  – 260 x 87 x 36 mm (10.2 x 3.4 x 1.4 inches)

– Weight: 450 g (0.99 lb)

Accessories Included:

– Instruction Manual: 1 PC

– Calibration Screwdriver: 1 PC

– Carrying Case: 1 PC