Software and systems engineering — Life cycle management — Guidelines for process description
An increasing number of international, national and industry standards describe process models. These models are developed for a range of purposes including process implementation and assessment. The terms and descriptions used in such models vary in format, content and level of prescription. ISO/IEC TR 24774:2007 presents guidelines for the elements used most frequently in describing a process:…
Software and systems engineering - Life cycle management - Guidelines for process description
An increasing number of international, national and industry standards describe process models. These models are developed for a range of purposes including process implementation and assessment. The terms and descriptions used in such models vary in format, content and level of prescription. ISO/IEC TR 24774:2007 presents guidelines for the elements used most frequently in describing a process:…
ISO 14596:2007 specifies a method for the determination of the sulfur content of liquid petroleum products, additives for petroleum products, and semi-solid and solid petroleum products that are either liquefied by moderate heating or soluble in organic solvents of negligible or accurately known sulfur content. The method is applicable to products or additives having sulfur contents in the range…
Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up...
IEC 62127-1:2007 specifies methods of use of calibrated hydrophones for the measurement in liquids of acoustic fields generated by ultrasonic medical equipment operating in the frequency range up to 40 MHz. The objectives of this standard are:
- to define a group of acoustic parameters that can be measured on a physically sound basis;
- to define a second group of parameters that can be derived…
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz
IEC 62127-2:2007 specifies absolute hydrophone calibration methods and relative (comparative) hydrophone calibration methods. This standard is applicable to:
- hydrophones used for measurements made in water and in the ultrasonic frequency range up to 40 MHz;
- hydrophones employing circular piezoelectric sensor elements, designed to measure the pulsed wave and continuous wave ultrasonic fields…
Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up...
IEC 62127-1:2007 specifies methods of use of calibrated hydrophones for the measurement in liquids of acoustic fields generated by ultrasonic medical equipment operating in the frequency range up to 40 MHz. The objectives of this standard are:<br />
- to define a group of acoustic parameters that can be measured on a physically sound basis;<br />
- to define a second group of…
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz
IEC 62127-2:2007 specifies absolute hydrophone calibration methods and relative (comparative) hydrophone calibration methods. This standard is applicable to:<br />
- hydrophones used for measurements made in water and in the ultrasonic frequency range up to 40 MHz;<br />
- hydrophones employing circular piezoelectric sensor elements, designed to measure the pulsed wave and continuous…
