It was a valued export in Silk Road trading, but the manufacturing process was kept secret. During the Tang Dynasty (618-907) and the Song Dynasty (960-1279), varieties of paper were developed for different purposes.
April 7, 2015 Written by controlguru. Like the P-Only controller, the Proportional-Integral (PI) algorithm computes and transmits a controller output (CO) signal every sample time, T, to the final control element (e.g., valve, variable speed pump).
The PIM test equipment measures the magnitude of the PIM generated by the test signals and displays this information to the test operator. 8 Although the typical reference (carrier) power level is 20 W (+43dBm), testing may also be done using a 2 W reference power level.