This is an integrating sound level datalogger, model 407780. It has programmable integrating time, provides precise linearity over a wide range (100dB), and displays Leq, SEL, SPL, MAX-L and MIN-L measurements. Response time (FAST, SLOW and IMPULSE) and frequency weighting (A and C) are programmable. The analog output (AC and DC) can be used with headphones, chart recorders or other devices to store data. The 407780 with PC Interface and real-time calendar clock datalogs (stores) up to 32,000 readings for later transfer to PC. Careful use of this meter will provide years of reliable service.
The Extech 407780 is an integrating sound level meter designed to provide precise linearity over a wide range of 100dB. It displays Leq, SEL, SPL, MAX-L, and MIN-L measurements and supports programmable response times (FAST, SLOW, IMPULSE) and frequency weightings (A and C). The device features an analog output for chart recorders and a PC interface capable of storing up to 32,000 readings.
| Linearity Range | 100dB |
|---|---|
| Maximum Storage | 32,000 readings |
| Response Time (FAST) | 125ms |
| Response Time (SLOW) | 1 second |
| Response Time (IMPULSE) | 35ms |
| Analog Output (AC) | 2 Vrms at 130dB |
| Analog Output (DC) | 10mV/dB |
| Battery Type | four (4) 'AA' 1.5V batteries |
The meter supports FAST (125ms), SLOW (1 second), and IMPULSE (35ms with slow decay) response times.
The 407780 can store up to 32,000 readings for later transfer to a PC.
The device supports A and C frequency weightings, which are programmable via the A/C switch.