ISO 16831:2012 pdf download.Non-destructive testing一Ultrasonic testing一Characterization and verification of ultrasonic thickness measuring equipment.
ISO 16831 specifies methods and acceptance criteria for assessing the performance of instruments formeasuring thickness using pulse-echo ultrasound.
ISO 16831 covers both direct (digital) reading and waveform display types using single or dual element probes.
ISO 16831 can be used for verifying equipment covered by EN 12668 when used for thickness measurement.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5577, Non-destructive testing — Ultrasonic inspection — Vocabulaty
EN 1330-4, Non destructive testing — Terminology — Part 4: Terms used in ultrasonic testing
EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy structural steels
EN 12668-2, Non-destructive testing — Characterization and verification of ultrasonic examination equipment — Part 2: Probes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5577 and EN 1330-4 apply.
4 General requirements for compliance
Ultrasonic thickness measuring equipment complies with this standard if it satisfies all the following conditions:
a) ultrasonic instrument and probe comply with the technical requirements of this standard;
b) either a declaration of conformity, issued by an organization certified in accordance with ISO 9001; or a certificate issued by an organization accredited according to ISO/IEC 17050-1 and ISO/IEC 17050-2, or a test report issued by an organization performing in-house calibration;
c) ultrasonic instrument and probe are clearly marked to identify the manufacturer, type and series, and carr{ a unique serial number;
d) user instruction manual for the particular type and series of the ultrasonic equipment is available;
e) manufacturer’s technical specification for the appropriate type and series of ultrasonic equipment which defines the performance criteria in accordance with this standard is available.
NOTE The manufacturer’s technical specification does not in itself constitute the certificate of measured values required in b).
5 Manufacturer’s technical specification for ultrasonic thickness measuring equipment
5.1 General
The manufacturer’s technical specification for a particular model of ultrasonic thickness measuring equipment shall contain, as a minimum, the information listed in 5.2 to 5.5. Values obtained from the tests described in Clause 7 shall be quoted as nominal values with tolerances given as indicated.
5.2 General attributes
The following shall be detailed:
a) size;
b) “mass (at an operational stage);
c) type(s) of power supply;
d) type(s) of probe sockets;
e) battery operational time (as new, at maximum power consumption with a specified duty cycle);
f) temperature and voltage (mains and/or battery) ranges, in which operation complies with the technical specification — if a warm-up period is necessary, the duration of this shall be stated;
g) form of indication given when a low battery voltage takes the ultrasonic instrument performance outside of specification;
h) pulse repetition frequencies (PRF5) (switched positions and/or variable ranges);
I) if available, monitor outputs to indicate when the measurement values fall outside a set tolerance.ISO 16831 pdf download.