GB/T 39849-2021 Translated English of Chinese Standard (GBT39849-2021): Non-destructive testing instruments -- Ultrasonic time-of-flight diffraction instrument -- Methods of performance tests [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]www.ChineseStandard.net, 2021 M06 30 - 21 pages This Standard specifies methods of performance tests for the UTOFD instrument. This Standard applies to the UTOFD instrument. |
Common terms and phrases
according to Formula analog signal arbitrary waveform signal base line range calculated according center frequency fo Collection depth connect the oscilloscope cross-talk damping damping during transmission decibels dB detection signal digital oscilloscope display screen double crystal probe dynamic range equivalent input noise external standard attenuator frequency band frequency bandwidth full-screen amplitude GB/T Hertz Hz highest real-time sampling input signal amplitude instrument sampling rate leading edge lower-limit frequency measured UTOFD instrument Measuring instruments minimum signal amplitude Non-destructive testing number of sampling oscilloscope to measure output end peak-to-peak voltage probe working mode pulse recoil amplitude pulse repetition frequency radio frequency real-time sampling rate receiving input end sampling accuracy Sampling error sawtooth wave screen amplitude Set the UTOFD set value shown in Figure sine wave signal square wave test signal gate time-of-flight transmitted pulse duration transmitted pulse recoil transmitted pulse rise upper-limit frequency UTOFD instrument reaches UTOFD instrument sampling volts