الفهرس | Only 14 pages are availabe for public view |
Abstract Radiation Force Balance (RFB) system at the National Institute of Standards (NIS- Egypt) has been constructed and realized with the objective to be used for the radiation power measurements and calibration of ultrasonic transducers. The system is based on the change in weight of an absorbed target as the transducer is turned on and off. So, the main component is a Mettler Toledo electronic digital balance. The RFBsystem was automated using Lab VIEW program. The Lab VIEW program was designed for the processing of the readings from the measuring instrument in automatic mode. The measurements results were presented an expanded uncertainty at confidence level 95% (with a coverage factor of k=2). The RFB system performance was validated and realized by participating in the informal bilateral comparison between KRISS, NMIJ and NIS for the same standard ultrasonic reference transducer and good agreement was obtained. |