Gain & Voltage

High gain is harmless, high voltage is not. Be nice to your transducers. We all know they're consumables but that doesn't mean beating the living daylights out of them with high voltage settings. Try a lower voltage setting first. Plus, your battery will last longer!

[@MyCanucks2011]

That was useful. Thank you Paul. I’m going to stop driving my crystals so hard when I don’t need to, I’m sure they will appreciate it and my battery too.

[@NDTVideoLibrary]

Best way to explain gain vs voltage!! I would love your UT class.

[@hollowayndtengineeringinc.5201]

Thanks... I should really go about actually MAKING that class! It's been on my to do list forever.

[@daveseto3778]

Thanks Paul! These are always entertaining and informative. For automated immersion inspections, we adjust both voltage (up to 500V) and pulse width in order to maximize the energy output form the probe, because there are often external sources of EMI / RFI noise. In this situation, riding the increased gain also amplifies the noise, so we lose sensitivity to small flaws. Absolutely concur that one must pay attention to what the probe can withstand. A piezo crystal can take a lot more than a PVDF film transducer.

[@gordon6029]

Thank you Paul.

[@sourabhchandrakar8003]

You explain very clearly...

[@darismandarisman8356]

How to adjust the voltage..?