Sound Level Meter LSDM-A11 is a universal sound level meter that measures the exponential time weighted sound level. It is small in size, light in weight and easy to carry unit. It has 1/2 inch electret condenser type microphone and offers 4 measurement parameters Lp (sound level), Leq (Equivalent Continuous A Sound Level ), Lmax ( Maximum Sound Level) and LN (Percent of all readings over alarm value set with 4 digit LCD display, function mark, time weighting, weighting icon and data memorized. Permits choice A, C, F weighting and Fast/Slow response times and interface use RS-232 data output to connect with PC.
| Standards | IEC 651.2, ANSI 1.4.2 |
| Parameters | Lp-Sound Level |
| Measured Leq | Equivalent Continuous A Sound Level |
| Measured Lmax | Maximum Sound Level |
| Measured LN | Percent of All Readings Over Alarm Value Set |
| Testing Range Lp | 30 to 130 dB ( A Weighting ) 35 to 130 dB ( C Weighting ) 40 to 130 dB ( F Weighting ) |
| Testing Range Leq | 30 to 130 dB (10 Seconds, 1 Min, 5 Min, 10 Min, 15 Min, 30 Min, 1 Hour, 8 Hours, 24 Hours) |
| Testing Range LN | 0 to 100 % |
| Resolution | 0.1 dB |
| Accuracy | 1 dB |
| Frequency | A /C / F (Flat) |
| Time Weighting | Fast (125 ms) / Slow (1 Second) |
| Microphone | 1/2 Inch Electret Condenser Type |
| Memory | 30 Groups with Measuring Conditions |
| Calibration | 94 dB at 1k Hz (sinusoidal) |
| Frequency Range | 20 to 12, 500Hz |
| Alarm Value Set | 30 to 130 dB |
| Alarm Output | LED Optional Relay Contact (NC) |
| Indicator | Low Battery Indicator |
| Dimensions | 236 × 63 × 26 mm |
| External DC | 6V, DC, 100mA |
| Power Supply | 4 × 1.5 V AAA Size (UM-4) Battery |
| Weight | 170 g |
| Microphone | Φ 12.7 mm (1/2) test condenser microphone |
| Frequency weighting | A, C, and Lin (Linear) |
| Range | 25 dB to 130dB (A) |
| Standards | ANSI S1.40 CLASS2, IEC942 |
| Sound Pressure Level | 94 dB 114 dB |
| Accuracy | 0.3 dB |
