Cylindrical object diagnosing method e.g. for drilling samples, involves fixing object to configuration ring that has guide sleeves for placing pulse transmitter and pulse receiver, at equal intervals
A configuration ring is hinged to the cylindrical object (7). The ring has several guide sleeves (5) at equal intervals into which pulse transmitter (3) and pulse receiver (4) are inserted. A wiring (6) is connected to the sleeve and electrically connected to the transmitter (3) and receiver (4) by the spring contacts (2). An Independent claim is also included for configuration ring.