CTU$\_$C$5$:$2$

$8-24$ Two ingredients, A and B$,$ are to be heated and mixed. Two pumps, P$1$ and P$2,$ provide the necessary pressure to send the ingredients through the lines. The procedure is as follows:

The start pushbutton is pressed to start the process and pump P$1.$

After $100$ gallons of ingredient A are pumped into the tank, pump P$1$ stops automatically and the heater is automatically turned on$.$

The heater is automatically turned off after $2$ seconds, and pump P$2$ is energized.

Ingredient B is pumped into the tank, by pump P$2,$ until the liquid reaches the highlevel sensor$.$

The mixer motor starts automatically and runs for $10$ seconds.

After the mixer motor stops, P$3$ discharge pump starts automatically and runs until the low$-$level sensor is actuated.

The process stops.

The process can be stopped at any time, by means of the stop button, without loss of the counter accumulated count or the timer accumulated time.

The idle light is energized whenever the process is stopped.

The run light is energized whenever the process is in operation.

The full light is energized whenever the tank is full.