Practical Instrumentation Questions - Instrumentation Tools

Analytical Process Control Question

Describe in detail the effect this calibration error will have on the performance of the analytical process control system.

Sketch arrows next to each of the two solenoid valves showing the directions of air flow in the energized (E) and de-energized (D) states.

Determine the necessary PLC switch actuation status (i.e. low versus high process stimulus) to turn the yellow lamp on.

Inspecting the trends of PV and SP on a process chart recorder, you notice the poor quality of control loop.

A potable water storage tank requires a high level alarm to warn operations personnel. Design a simple indicator circuit.

Describe in detail the effect this heat exchanger problem will have on the performance of the analytical control system.

Sketch a Ladder Diagram program for this PLC to energize the lamp if the following input conditions are met.

Suppose we have a PLC connected to three pushbutton switches. Sketch a Ladder Diagram program for program example.

Suppose we have an Allen-Bradley MicroLogix 1000 PLC and two pressure switches we need to connect to it.

A resistive tape level sensor is a two-wire element immersed in a liquid, which changes resistance as liquid level increases.