[4] A 3−15 psi output range, direct acting P+I controller has a process under control and is outputting 7 psi. Its gain

[answerhappygod]

4 A 3 15 Psi Output Range Direct Acting P I Controller Has A Process Under Control And Is Outputting 7 Psi Its Gain 1 (65.95 KiB) Viewed 64 times

[4] A 3−15 psi output range, direct acting P+I controller has a process under control and is outputting 7 psi. Its gain is set at 0.5 and its integral time at 35 seconds. A shock load instantaneously increases the transmitter signal by 2 psi. Assuming there is no significant change in transmitter input for the next two minutes, list the controller output at 35 and 105 seconds after the disturbance. P=KC​(c−r)+Ti​KC​​∫(c−r​)dt​+P0​ Where: P - controller output pressure in psi; P0​− initial or "base point" controller output pressure in psi; Kc− controller gain (positive for direct action, negative for reverse action); c− transmitter output in psi: r− setpoint transmitter output in psi ( 3 psi when set level =0;15 psi when set level =100 ) Ti - the reset time P(35)=0.5×2+0.5/35×2×35+7P(35)=1+1+7P(35)=9psiP(105)=0.5×2+0.5/35×2×105+7P(105)=1+3+7P(105)=11psi​