KANOMAX Model 6236 Type 1 Precision Integrating Sound Level Meter

Overview

The KANOMAX Model 6236 is a Class 1 integrating sound level meter engineered for high-accuracy environmental and occupational noise assessment in accordance with IEC 61672-1:2013 and ANSI S1.4-1983 standards. Designed and manufactured in Japan, it employs a precision electret condenser microphone (TYPE 7146NL) with calibrated free-field response and low self-noise (0.1 dB), enabling reliable detection across the full audible spectrum from 20 Hz to 8 kHz. Its core measurement architecture supports simultaneous real-time evaluation of multiple acoustic parameters—including instantaneous sound pressure level (SPL), equivalent continuous sound level (L_eq), maximum/minimum levels (L_max/L_min), peak sound pressure (L_peak), and time-weighted percentile levels (L_n). The instrument operates in A-, C-, and Z-frequency weightings, with selectable time constants (Fast: 125 ms; Slow: 1 s), making it suitable for both regulatory compliance monitoring and detailed noise source characterization.

Key Features

• Class 1 performance per IEC 61672-1:2013 — certified for legal metrology and occupational health applications requiring traceable accuracy.
• High-resolution backlit LCD display with dynamic analog bar graph for intuitive real-time level visualization and trend identification.
• Integrated data logging capability supporting up to 199 hours, 59 minutes, and 59 seconds of continuous measurement with timestamped storage.
• Dual-channel memory architecture allows concurrent recording of multiple metrics (e.g., L_eq, L_max, L₁₀) without external software intervention.
• Robust mechanical design: compact handheld form factor (86 × 285 × 46 mm), IP54-rated enclosure for dust and splash resistance, and ergonomic grip for extended field use.
• Flexible power management: dual-mode operation via four standard AA alkaline cells (typical 9-hour runtime) or optional AC adapter for stationary deployments.

Sample Compatibility & Compliance

The Model 6236 is validated for use with standardized acoustic calibration sources (e.g., pistonphones per IEC 60942) and compatible with KANOMAX’s certified calibration accessories. It meets the physical and electroacoustic requirements of IEC 61672-1 Class 1 for frequency weighting, linearity, dynamic range, and temperature stability (operating range: −10 °C to +50 °C). Its design aligns with occupational exposure limit frameworks including OSHA 29 CFR 1910.95, EU Directive 2003/10/EC, and ISO 9612:2009 for noise mapping and worker dose assessment. The instrument’s firmware and hardware architecture support audit-ready documentation workflows required under ISO/IEC 17025-accredited laboratories and GLP-compliant industrial hygiene programs.

Software & Data Management

Raw measurement data are stored internally in non-volatile memory and exportable via USB interface (USB-B port) in CSV format for post-processing in third-party analysis tools (e.g., MATLAB, Python pandas, or specialized acoustics software such as SoundPLAN or Norsonic Nor848B). No proprietary driver installation is required—device appears as a standard mass-storage class peripheral. Firmware updates are distributed through KANOMAX’s official technical support portal and validated against IEC 61508 functional safety guidelines. All logged datasets include embedded metadata: date/time stamps, microphone serial number, calibration status flag, weighting/filter selection, and battery voltage history—ensuring full traceability per ISO/IEC 17025 Clause 7.7 and FDA 21 CFR Part 11 principles where applicable.

Applications

• Ongoing workplace noise surveys for OEL compliance and hearing conservation program implementation.
• Environmental noise impact assessments near transportation corridors, construction sites, and industrial facilities.
• Product noise certification testing for consumer electronics, HVAC systems, and automotive components per ISO 3744 and ISO 3746.
• Acoustic validation of architectural elements (e.g., façade insulation, room reverberation control) in accordance with ISO 140 series standards.
• Educational laboratory instruction in acoustics engineering and environmental science curricula.
• Field verification of noise barrier efficacy and urban soundscaping initiatives.

FAQ

What calibration standards does the Model 6236 support?
It is fully compatible with Class 1 pistonphone calibrators (e.g., G.R.A.S. 42AA, Brüel & Kjær 4231) and meets periodic verification requirements per ISO 9001 and ISO/IEC 17025.
Can the device measure impulse or impact noise?
Yes — it captures L_peak with 50 µs rise time and supports single-event analysis mode for gunshot, hammer blow, or machinery start-up transients.
Is the microphone permanently attached or field-replaceable?
The TYPE 7146NL microphone is integrated but serviceable; replacement requires factory recalibration to maintain Class 1 traceability.
Does the instrument support real-time octave or 1/3-octave band analysis?
No — the Model 6236 is a broadband integrating sound level meter; spectral analysis requires external FFT analyzers or KANOMAX’s Model 6330 series.
How is measurement uncertainty quantified for regulatory reporting?
Total expanded uncertainty (k = 2) is ≤ ±0.3 dB under reference conditions (23 °C, 50% RH, 101.3 kPa), as documented in the included calibration certificate and traceable to NMIJ/AIST.