The Extech 407790 Real Time Octave Band Analyzer is an auto ranging Type 2 integrating sound level meter featuring 1/1 and 1/3 Octave Band real-time noise analyses. The 407790 offers five measurement parameters: SPL (Sound Pressure Level), Leq (Equivalent Continuous Sound Pressure Level), LE (Sound Exposure Level), Lmax (Maximum Sound Pressure Level), and Lmin (Minimum Sound Pressure Level). The built-in memory stores 12280 data records in sound level mode and 1024 records in Octave mode. The stored data can be easily transferred to a PC with the supplied software and RS-232 cable. This meter permits choice of ‘A’, ‘C’, or ‘Flat’ weighting and ‘Slow’ / ‘Fast’ response times. AC and DC analog output signals are available for chart recorders and other external recording devices. Careful use of this device will provide years of reliable service.
The Extech Model 407790 is an auto-ranging Type 2 integrating sound level meter that features real-time noise analyses for both 1/1 and 1/3 octave bands. It offers five measurement parameters including SPL, Leq, LE, Lmax, and Lmin, along with built-in memory capable of storing thousands of data records.
| Applicable Standards | IEC 60651 type2, 60804 type 2, ANSI S1.4 type2, IEC 1260 (1995) |
|---|---|
| Display | Backlit LCD (160×160 dot matrix) |
| Measurement Frequency range | 25Hz to 10 kHz |
| Dynamic range (SLM mode) | 100dB |
| Measurement range | 30dB to 130dB |
| Frequency weighting options | 'A', 'C', or 'Flat' |
| Time weighting (Response Time) | Fast and Slow |
| Microphone type | 1/2 inch electret condenser type |
| Memory capacity (Sound level mode) | 10,000 data sets (Auto) / 1024 (Manual) |
| Power source | Four (4) C size 1.5V alkaline batteries |
The meter permits choice of 'A', 'C', or 'Flat' weighting.
The recommended full recalibration cycle is 1 year.
The built-in memory stores 12,280 data records in sound level mode.
The accuracy is ±1.5dB when referenced to 94dB at 1kHz.