Specifications
| Measurement parameter | Lp - normal sound level measurement, Leq - equivalent sound level measurement, Lmax - maximum sound level measurement, LN - statistical sound level measurement |
| meet the standard | IEC 651.2, ANSI 1.4.2 |
| Leq - Equivalent Sound Level | 30~130dB (time optional 10 seconds, 1 minute, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 1 hour, 8 hours, 24 hours) |
| Measurement range -LN - statistics, sound level measurement | 0~100% |
| resolution | 0.1dB |
| Precision | 1dB |
| Frequency Weighting | “A”/“C”/“F”（Flat） |
| time Weighting | Fast/slow |
| microphone | 12.5Mm condenser microphone |
| memory function | 30 groups |
| Built-in calibrated signal | 94dB |
| Frequency range | 20~12,500Hz |
| Alarm value setting | 30~130dB |
| Alarm output | LED optional relay touchpoint |
| Power supply Voltage indication | Low Voltage prompt |
| Power supply Voltage | 4 AA batteries |
| External power socket | 6V, DC, 100mA |
| Dimension | 236*63*26mm |
| Weight | 170g |
Packing list
After-sales instructions
None
[Note] For after-sales services outside the Chinese mainland, if the instrument requires repair, the shipping and possible associated taxes shall be borne by the sender. Generation address of the manual: http://en.nbchao.com/p/20728/Specification.html , which is only used by users who purchase commodities from the NBCHAO.