Overview
Enviro Test Construct Portable Intrinsically Safe Noise Level Meter is a noise and vibration analyzer that integrates high performance and high stability through digital signal processing technology. It adopts a modular design and can simultaneously analyze multiple noise evaluation indicators. The instrument supports large-capacity storage, high-fidelity recording, millisecond-level data recording, and also has data transmission functions such as 4G, Bluetooth, and a serial port.
Technical Specifications
| No. | Specification | Description |
| 1 | Dynamic Range | 127 dB ultra-wide, no need to switch the range |
| 2 | Display | 3.5-inch capacitive touch screen + 6 physical buttons (supports both touch and button operation) |
| 3 | Storage | Built-in 64 GB storage chip, expandable with 64 GB storage card |
| 4 | Design | Scene-based design with preset parameters for different application standards and scenarios for convenient operation |
| 5 | Analysis Functions | Total value integration, statistical integration, 24-hour measurement, 1/1 OCT analysis, 1/3 OCT analysis, FFT analysis, indoor measurement, sound exposure test |
| 6 | Measurement Microphone | AWA14421 type, reference sensitivity level: -29.0 dB (referenced to 1 V/Pa as 0 dB) Notes: 1. Sensitivity level referenced at 1 V/Pa = 0 dB. 2. Measurement range varies with sensitivity level. |
| 7 | Pre-amplifier | AWA14601 type, X9 connector |
| 8 | Frequency Range | 20 Hz – 12.5 kHz |
| 9 | A/D Bit | 24 bits |
| 10 | Sampling Frequency | 48 kHz, 96 kHz |
| 11 | Electronic Noise | < 9 dBA, 11 dBC, 21 dBZ; low sound field self-generated noise < 18 dBA |
| 12 | 1000 Hz Measurement Range | A-weighted: 18–145 dB C-weighted: 20–145 dB Z-weighted: 30–145 dB C-weighted peak: 60–148 dB |
| 13 | Other Frequency Linear Range | 31.5 Hz: 18–105 dB (A) 4 kHz: 18–146 dB (A) 8 kHz: 18–144 dB (A) 12.5 kHz: 18–138 dB (A) |
| 14 | Time Weighting | Parallel (simultaneous) F, S, I |
| 15 | Frequency Weighting | Parallel (simultaneous) A, C, Z |
