Nti Audio Xl2, Spectral Limits Option

That's the sound of an electric drill. Sounds about right. But would you be able to hear the difference in sound if part of the drills mechanics were slightly damaged? Perhaps you could if you have 35 years experience studying only the sound of such drills. What if you had a sound or vibration measurement device that could show you the difference? Moreover, what if seeing that difference prompts you to fix the damage in the drill BEFORE it becomes a real problem? This is EXACTLY what the Spectral Limits Option of the XL2 Audio and Acoustic Analyzer can do for you. Let me show you how simple this is. Here is a sample drill in good working order. Let's attach a vibration sensor to the drill and connect it to the XL2. Start the drill, and simply press the Start button on the XL2. This records the LEQ frequency response for 3 seconds. Stop the drill, and capture the result. Let's name it M55. Attach the sensor to a second sample drill in good working order. Start the 2nd drill, and simply press the Start button on the XL2. Stop the drill, and capture this LEQ 3 second result as M56. Finally measure a 3rd drill in good working order. Start the drill, and press the Start button. 3 seconds later, stop the drill, and capture this third result as M57. We now use these 3 captures to define a tolerance band within which the vibrations from any other drill should fall. To do this, we start the Tolerance mode, select the 3 captures and calculate the Min/Max. This is then displayed as a tolerance band on the screen with +- 10 dB indicated by the grey band. Let's change this tolerance to 6 dB, so any vibration that is twice as loud or soft in any frequency will fail. We are now ready to evaluate other drills. Let's attach the sensor to the drill we heard at the beginning of this video, which kind-of sounded right, but the drill is actually slightly damaged. Then let's look at the acoustic fingerprint of this drill compared to the tolerance band we have now defined for the 3 good drills. Start the faulty drill, and press the Start button on the XL2. After 3 seconds we can clearly see that the frequency response of the faulty drill is out-of-tolerance, shown by these fault indicators in each frequency band, the red limit button and the red light on the stack lamp. The applications for the Spectral Limits Option include: End-of-line Quality Control Repair Diagnostics & Inspection Production Maintenance and essentially any machine that can be identified with an acoustic fingerprint. So, the XL2 Spectral Limits Option provides: Real Time Analysis resolution of up to 1/12 octave Tolerance analysis within the Zoom FFT function Signal capturing Relative, Mean and Min/Max measurements Tolerance file handling and Pass / Fail indication This ends the presentation of the XL2 Spectral Limits Option. There are many other functions available on the XL2 that are not covered in this presentation, but are reviewed in other video-takes. Take a look at nti-audio.com By the way, to demonstrate the performance of this audio analyzer, we would like to let you know that all the audio of this presentation has been recorded directly by this measurement microphone and this audio analyzer, while we were doing the audio analysis. Listen to this.