Overview
Enviro Test Construct Noise Dose Meter is a parameter used to quantify noise exposure measured in a period, during turns of % noise exposure relative to 90dBA for 8 hours., 100% DOSE = 90dBA for 8 hours This is known as the Criterion. Other criterion is available such as 100% DOSE = 85 dBA for 8 hours to meet legislation in different countries. If the person stayed in this environment for 4 hours, he would receive 50%DOSE. Also if the noise level was said 93 dBA, 3 dB higher, a 100% DOSE would be accumulated in only 4 hours, The above example is for a dose meter with 3dB Exchange Rate, where a 3dB increase in sound level corresponds to a doubling energy. A dose meter with 5dB Exchange Rate is also, available where the sound must increase by 5dB to double the dose as required to meet noise legislation in some countries.
Features
- User-Friendly Operation
- 8 Built-in Standard Dose Setups
- 9 User-Defined Setups
- Single Sound Level Meter Setup
- 50 Dose Result Stores
- Keypad Lock for Protection
- Timers for Measurement Control
- USB Data Output for PC Connection
Technical Specification
| Parameter | Value |
| Microphone | 1/2-inch Electret Condenser, 31-inch Cable |
| Display | Liquid Crystal Display |
| Measurement Ranges | 60 dB to 130 dB (A and C), 70 dB to 140 dB (A and C) |
| Peak Ranges | 93 dB to 133 dB Peak, 103 dB to 143 dB Peak |
| Frequency Weightings | RMS: A or C, Peak: C or Z (Linear) |
| Time Weightings | Fast and Slow (RMS Detector) |
| Exchange Rate | 3, 4, 5, or 6 dB |
| Stabilization Time | 10 seconds from power on |
| Threshold and Criterion Levels | User-defined setups: Threshold 70 dB to 90 dB, Criterion 80, 84, 85, or 90 dB |
| Under-Range Indications | High Level Detector at 115 dB |
| Keypad Lock | Lock/Unlock with Key Combinations |
| Clock | Real-time Clock with Calendar |
| Memory | Results from 50 measurements stored |
| Measurement Control | Duration: 5, 10, 15, 30 mins, 1, 2, 4, 8, 10, 12, or 24 hours |
| Timers | Up to 16 timers, Timer Controlled Start/Stop |
| Logging | All measurement parameters logged |
| Logging Period (LP) | 1s, 2s, 5s, 10s, 15s, 20s, 30s, 1min, 2min, 5min, 10min, 15min, 20min, 30min, or 60min |
| Logging Capacity | 120,000 values can be stored at any one time |
| Setup | 8 built-in default setups, 9 user-defined setups |
| Output | USB Interface |
| Power Supply | 4×1.5V AAA Size (UM-4) Battery |
| Battery Indicator | Symbol indication of battery voltage level, flashes when voltage is insufficient |
| Operating Temperature & Humidity | 32 ℉ to 122 ℉ (0 °C to 50 °C), 10 – 90 % RH |
| Storage Temperature & Humidity | 14 ℉ to 140 ℉ (-10 °C To 60 °C), 10 – 75 % RH |
| Size | 5.51 in × 2.83 in × 1.34 in (139.954 mm× 71.884 mm × 34.036 mm) |
| Weight | Approx. 0.772 lb (0.3498 kg) |
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