TEST YOURSELF: Calculate
the optimum PI for this process.
1. Data captured using a paperless recorder
2. Data captured using a chart recorder
1. Td = 3.3 s, RR = 0.1747 / s, P = 64.1%, I = 11 s
2. Td = 1.8 s, RR = 0.3230 / s, P = 64.6%, I = 6 s
Your answers should not differ much from mine.
F.G. Shinskey: Process
Control System of 4th Ed. p99
For liquid flow loop: P is between 50 - 500% and I is between 0.3 - 3 s