Checkline DFX-7 - Manual (Page 44)

Dakota Ultrasonics
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Pulse-Echo Temperature Compensated Mode – Temp Comp (PETP)
This is a custom mode that combines pulse-echo and electronic zero techniques to
automatically adjust for temperature changes in the transducer as a result of an
increasing/decreasing temperature gradient in the test material. Note: rough surface
conditions can have an effect on the overall accuracy in this mode. If the surface
condition is in question, the pulse-echo mode should be used in conjunction with
performing an off block automatic zero as the temperature gradient changes.