Model 407764

      Extech's Datalogging Sound Level Meter is capable of performing all your noise measurements needs in addition to Model 407764's capabilities for data acquisition (direct data storage to a PC) or datalogging (data storage to internal memory for later download). Data storage enables the user to save data, analyze data and generate reports. This professional meter, with proper care, will provide years of safe and reliable service.
       Model 407764 has four unique features whic hsi as follows: The first one is the range is from 30 dB to 130 dB.The second one is 4-digit LCD display with 0.1dB resolution. The third one is A and C frequency weighting. The forth one is RS-232 PC interface with 128,000 point datalogger and date / time stamp.The fifth one is auto-ranging introduction.
       Then, there are also some specifications about Model 407764. Applicable standards are IEC651 Type 2, ANSI S1.4 Type 2. Accurancy is ±1.5dB (under reference conditions). Frenquency range is from 31.5Hz to 8KHz. Measuring level is from 30 dB to 130 dB. Frequency weighting is A and C. Microphone is 0.5" Electret condenser microphone. Display is 4-digit LCD(Resolution: 0.1dB, Display period: 0.5 sec). Bargrah is 50dB scale (1dB steps)( Display period: 50mS; Auto-ranging:100dB scale, 2dB steps).Sampling rate is 50 mS. Memory size is 128,000 records / 255 sets (non-volatile memory). Datalogging sample rate is 1 to 86,400 seconds per record. Time weighting is that FAST is 125mS and SLOW is 1 sec. MAX is Maximum reading held. Level ranges are 30-80dB, 40-90dB, 50-100dB, 60-110 dB, 70-120dB, 80-130dB(Total of 6 ranges). Auto range is 30 dB to 130 dB. Linearity range is 50 dB. Alarm function is over indicator for readings higher than high limit while under indicator for readings lower than low limit. Operating temperature is from 32^oF to 104^oF (0 to 40^oC). Operating humidity is 10%RH to 80%RH. Storage temperature 14oF to 140oF (-10 to 60^oC). Memory size is 128,000 data records with Date and Time Stamping. RS-232 Interface is that Baud rate is 9600bps.
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