AWA5636 Series Digital Sound Level Meter
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | AWA5636 |
| Pricing | Available Upon Request |
| Compliance | IEC 61672:2002 Class 2, GB/T 3785–2010 Class 2 |
| Frequency Weighting | A, C, Z |
| Time Weighting | F, S, I, Peak |
| Frequency Range | 20 Hz – 12.5 kHz |
| Measurement Upper Limit | >130 dB |
| Self-Noise | ≤30 dBA (AWA5636-0), ≤25 dBA (AWA5636-1/2/3/4) |
| Display | 128×64 dot-matrix LCD |
| A/D Sampling Rate | 32 kHz |
| Output Interfaces | AC/DC analog outputs (configurable amplitude), RS232 (optional or standard per variant), USB (optional or standard per variant) |
| Data Storage | Up to 8,000 measurement records (AWA5636-1/3/4) |
| Integration Time | User-selectable from 1 s to 24 h (AWA5636-2/3/4) |
| Key Metrics | L<sub>p</sub>, L<sub>eq,t</sub>, L<sub>max</sub>, L<sub>min</sub>, L<sub>peak</sub>, SEL, E, L<sub>ex,8h</sub>, TWA, DOSE, L<sub>5</sub>–L<sub>95</sub>, SD, Ts, Volt, Date/Time |
| Statistical Analysis | Optional software-enabled (AWA5636-1/4) |
| Operating Temperature | −20 °C to +50 °C (model-dependent) |
Overview
The AWA5636 Series Digital Sound Level Meter is a modular, Class 2-compliant acoustic measurement instrument engineered for precision, reliability, and field adaptability in occupational health, environmental noise assessment, and industrial machinery evaluation. Based on advanced digital signal processing (DSP) architecture and real-time digital detection algorithms, the AWA5636 eliminates mechanical range switching—ensuring seamless dynamic response across its full operational span without gain-induced distortion or measurement interruption. Its core transduction system employs a calibrated condenser microphone (e.g., AWA14421) with stable sensitivity and low self-noise (as low as 25 dBA), enabling high-fidelity capture of transient impulses, broadband tonal emissions, and low-frequency energy down to 20 Hz. Designed in strict accordance with IEC 61672:2002 and GB/T 3785–2010 for Class 2 performance, the meter delivers metrologically traceable results suitable for regulatory documentation, compliance audits, and routine monitoring under ISO 14001 or OHSAS 18001 frameworks.
Key Features
- DSP-based real-time digital detection ensures consistent amplitude linearity, wide dynamic range (>130 dB), and immunity to analog drift or thermal hysteresis.
- Modular configuration architecture allows users to select only required functional modules—such as statistical analysis, extended integration timing, or serial/USB data export—optimizing total cost of ownership without over-specification.
- Extended operating temperature range (−20 °C to +50 °C, depending on variant) supports deployment in diverse climatic conditions, including outdoor environmental surveys and unconditioned industrial facilities.
- High-resolution 128×64 dot-matrix LCD provides clear, multi-layer display of real-time metrics (Lp, Lpeak), time-history trends, and contextual metadata (date, time, battery status, calibration flag).
- Built-in watchdog circuitry guarantees system-level fault tolerance and automatic recovery from unexpected power fluctuations or memory anomalies—critical for unattended long-term logging.
- Configurable analog outputs (AC/DC) with selectable amplitude scaling support direct connection to data loggers, oscilloscopes, or PLC-based SCADA systems for continuous acoustic surveillance.
Sample Compatibility & Compliance
The AWA5636 accommodates standardized 1/2″ electret condenser microphones compliant with IEC 61094, including the AWA14421 reference transducer. Its frequency weighting options (A, C, Z) and time constants (Fast, Slow, Impulse, Peak) satisfy requirements for occupational noise exposure assessment per ISO 9612 and national regulations such as China’s GBZ/T 188–2007. The instrument meets Class 2 accuracy tolerances defined in IEC 61672:2002 and GB/T 3785–2010, making it appropriate for workplace noise mapping, community noise monitoring near infrastructure projects, and pre-commissioning acoustic verification of HVAC, transportation, and manufacturing equipment. While not certified for Class 1 laboratory-grade metrology, its repeatability (±0.3 dB) and inter-unit consistency align with field-deployable QA/QC protocols under GLP-aligned workflows.
Software & Data Management
Data acquisition and post-processing are supported via optional PC software (licensed separately), which enables full configuration, remote control, and structured export of time-stamped datasets in CSV or XML formats. The software implements audit-trail functionality—including user login timestamps, parameter change logs, and calibration event records—to support 21 CFR Part 11–aligned documentation practices where applicable. Stored measurements (up to 8,000 records across AWA5636-1/3/4 variants) retain full metric context: Leq,t, Lex,8h, DOSE, percentile levels (L5–L95), standard deviation, and integration duration. RS232 and USB interfaces facilitate automated batch transfer, while DC output signals permit analog archival using third-party DAQ hardware compatible with NI-DAQmx or LabVIEW environments.
Applications
- Ongoing noise exposure assessment for occupational safety programs, including calculation of time-weighted average (TWA) and daily noise dose (DOSE) per ISO 1999 and national occupational hygiene standards.
- Environmental impact assessments (EIA) for construction sites, wind farms, highways, and rail corridors—supporting Lden, Lday, and Lnight derivation when paired with scheduled logging routines.
- Product noise certification testing for consumer appliances, power tools, and automotive components—leveraging peak hold, impulse detection, and broadband spectral insight.
- Acoustic troubleshooting in manufacturing plants—identifying dominant frequency bands, intermittent sources, and resonance signatures through synchronized time-history capture.
- Educational laboratories and technical training centers—where modularity, intuitive interface design, and compliance transparency support pedagogical objectives in acoustics engineering curricula.
FAQ
What international standards does the AWA5636 comply with?
The AWA5636 conforms to IEC 61672:2002 Class 2 and GB/T 3785–2010 Class 2 for sound level meters. It supports frequency weightings and time constants required by ISO 9612, ISO 532-1, and national occupational noise regulations.
Can the AWA5636 perform 8-hour equivalent noise exposure (Lex,8h) calculations?
Yes—models AWA5636-2, AWA5636-3, and AWA5636-4 compute Lex,8h, TWA, and DOSE in real time using integrated time-weighted algorithms and user-defined exposure durations.
Is firmware upgrade supported in the field?
Firmware updates are performed via USB or RS232 using manufacturer-provided utilities; version history and update procedures are documented in the technical manual and accessible through authorized service channels.
Does the device include internal calibration capability?
No—calibration requires an external Class 1 acoustic calibrator (e.g., AWA6221B) traceable to NIM or other national metrology institutes. The meter stores calibration date, reference level, and operator ID for audit readiness.
How is data integrity ensured during extended unattended operation?
The built-in watchdog circuit monitors CPU activity and resets the system upon anomaly detection. Non-volatile flash memory retains all stored records even after power loss, and timestamp synchronization uses an onboard RTC with ±2 sec/month accuracy.
