午夜dj免费中文字幕,午夜资源站,女人被爽到高潮在线视频免费,H片黄片在线免费搜索观看,国产精品无码A∨精品影院,国产精品自产拍在线观看花钱看,免费看国产黄线在线观看

◇ Product Introduction ◇ Product Features◇ Technical Indicator

[Product Introduction]

Ultrasonic flaw detector verification device uses pulse modulation method to calibrate the main performance of ultrasonic flaw detector, so as to avoid the influence of probe on verification/calibration data.

The system fully meets the requirements of JJG 746-2004 Verification Regulations for Ultrasonic Fault-Detector, and can be used as a metrological standard device to calibrate/calibrate the main performance of Ultrasonic Fault-Detector, such as: horizontal linearity, vertical linearity, dynamic range, attenuator error, operational sensitivity, etc.

[Technical indicators]

· Frequency range: 0.01MHz ~ 20MHz

· Frequency stability: 5×10-6

· Frequency accuracy: 5×10-6

· Signal amplitude range :(-55 ~ +23) dB

· Attenuation range :(0 ~ 101) dB

· Attenuator grading form: 20dB×2;10 db * 5;1 db x 10;0.1 dB x 10;

· Attenuator error :(0.5%*A±0.02dB), where A is the attenuation amount

· Number of sinusoidal waves included in burst sound: 1 ~ 100 can be adjusted, and the sinusoidal wave distortion is no more than 0.5%

· Sound range :(50 ~ 6000) mm

· Sound velocity range :(1000 ~ 9999) m/s

· Signal output mode: continuous wave, burst sound