Alarm circuit develop the alarm circuit to be used in the process control system. Temp (T), Presure (P), Flow (F), and Level (L) of fluid are each monitored by separate sensors circuits which make a high logic output signal when following indicated physical conditions exist.
High fluid temp
high fluid presure
low fluid flow rate
low fluid level
Alarm circuit output (A) must be high if any of the following physical conditions exist in system.
(1) Presure is high when flow is low
(2) temp is high when either presure is high or the level is low.
Write truth table in the order of T P F L. Make sure to recognize corect physical condition for alarm in the logic truth table.