Mistras Group
The Secret to Maximizing Remote-Field Testing Inspection Speed
By: Eddyfi Technologies
Source: Eddyfi Technologies
Any good tube testing technician knows that in order to reach new heights in accuracy, they need to bring a ladder to work. Okay, but in all seriousness, if youíve been performing tube testing for a while, you know that there is nothing riskier than getting inaccurate inspection results because a probe was pulled too quickly. Itís important to Ďstep upí and optimizing your inspection speed is critical. We recognize that putting your best foot forward to that magical maximum speed isnít exactly easy, but this blog will reveal how itís not black magic either.

Remote-field testing (RFT) and remote-field array (RFA) inspection results are especially sensitive to speed. It is particularly important when using this technique to have as much of an accurate maximum pulling speed as possible.

The probeís excitation frequency dictates what low-pass filter is applied to inspection data to lower noise. The frequency of the low-pass filter is directly proportional to the maximum inspection speed.

Simply put, the lower the excitation frequency, the higher the noise from the utility frequency (50 Hz or 60 Hz power outlet). The higher the noise, the tighter the low-pass filter (lower frequency) around the excitation frequency of the probe. Consequently, the tighter low-pass filter can eliminate high-frequency signals. This calls for a lower inspection speed to reduce the defectís signal frequency.

Read the full article at Eddyfi.com.

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