| Equipment |
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Inspections are carried out using an ultrasonic immersion system (tank), a single crystal longitudinal ultrasonic transducer, a pulse-echo ultrasonic instrumentation package and computerised c-scan recording equipment.
Please note; Although the technique is described as double through-transmission, this is a reference to the signal passing through the component twice and the instrumentation is in fact used in pulse-echo mode of operation. |
| A levelling table is placed on the base of the immersion system with a glass reflector plate placed on top of it, the table is carefully levelled to ensure that the distance between the glass plate and the transducer is constant at all times. |
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The component is then mounted on spacers above the glass plate, the spacers allowing sufficient distance (approximately 20mm) to differentiate between ultrasonic echoes. |
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