Description
They use two different weighting filters required by the IEC651 and ANSI S1.4 Type 2 for audio filtering. The A weighting is for general noise sound level and the C weighting is for measuring sound level of acoustic material control in various environments (ie 94 dB 1 kHz, etc).
- Designed to meet the measurement requirements of safety engineers, health, industrial safety offices and quality control in various environments.
- A and C weightings for checking compliance with safety regulations as well as acoustic analysis
- Measuring ranges: A weighting 30 – 130 dB, C weighting 35 – 130 dB
- Frequency range: 31.5 Hz – 8 kHz
- Display with 0.1 dB steps on a 4 digit LCD
- Slow (1 sec) and fast (125 ms) response settings to check peak and average noise levels
- Max/min recording
- Internal memory, 14,000 records
- Recording intervals from 1 second to 8 hours
- PC computer download capabilities
- Data hold to freeze reading on digital display
- CE, designed to meet IEC651 type 2, ANSI S1.4 type 2
Specifications
| Features | SM-10 | SM-20A |
| Microphone | 1/2 Electret condenser microphone | |
| Standard applied | IEC 651 Type 2, ANSI 1.4 Type 2 | |
| Dynamic range | 50 dB | |
| Time weighting | FAST (125 mS), SLOW (1 sec) | |
| Frequency range | 31.5 Hz → 8 kHz | |
| Measuring level range | (Auto Range) A-Weighting: 30 dB → 130 dB C-Weighting: 35 dB → 130 dB | |
| Data | Data hold | Min/max |
| Internal memory | – | 14,000 records |
| Specifications | |
| Display: | 4 digits LCD |
| Microphone: | 1/2 inch electret condenser microphone |
| Power supply: | 9V NEDA 1604, IEC 6F22, JIS 006P battery |
| Auto power off: | Approx. 5 min |
| Environment: | Indoor operation, < 2000 m |
| Standard applied: | IEC 651 Type 2, ANSI 1.4 Type 2 |
| Dynamic range: | 50 dB |
| Resolution: | 0.1 dB, Display update: 0.5 sec. |
| Time weighting: | FAST(125mS), SLOW(1 sec) |
| Frequency range: | 31.5 Hz to 8 kHz |
