Extech 407766 - Manuals

3 407744 & 407766-EN v5.3 1/14 Operation Theory of Operation The 407744 sound level calibrator generates a 94dB sine wave at 1 KHz. The 407766 generates a 94dB and a 114dB sine wave at 1kHz. When a microphone from a sound level meter is inserted into the calibrator, the sound level meter picks u...

4 407744 & 407766-EN v5.3 1/14 Specifications Output signals 407744: 94dB 407766: 94dB and 114dB Output signal accuracy 407744: ± 0.5dB; 407766: ± 0.5dB (94dB), ±1.0dB (114dB) Output signal frequency 1 KHz sine wave Accuracy of output signal frequency ± 5% Compatible microphones size 0.5” microp...

5 407744 & 407766-EN v5.3 1/14 Warranty   FLIR   Systems,   Inc.   warrants   this   Extech   Instruments   brand   device   to   be   free   of   defects   in   parts   and   workmanship   for   one   year   from   date   of   shipment   (a   six   month   limited   warranty   applies   to   se...