hello
i have a few questions about these ( daily ? ) verifications.
in nfen 12668-3 the frequency for verification of " screen height linearity and amplitude linearity " is very clear in Table 1 § 3.1 : what is to check daily and every week is also clear and cannot be interpreted.
for the ASME V Code, § T-532 and T-533 mention " shall be performed at the beginning
of each period of extended use (or every 3 months, whichever is less)."
have you any idea of what is an " extended use " ?
does " whichever is less " mean that it needs to be checked frequently ?
what is checked in this verification ? the Flaw Detector with the help of an anonymous probe or a " complete ultrasonic examination system. " ?