Problem on PLC, HMI, VFD, and Motor Circuit
There is a problem with PLC, HMI, VFD, and motor circuit and how to identify the location and nature of the system fault using a digital multimeter (DMM)?
Loop Controller HART Signal Noise
In this system a loop controller receives a process variable signal from a 2-wire (loop-powered) transmitter, and sends its own 4-20 mA control signal to operate a control valve. A…
Pipeline Project Management
Pipeline project management is a vast subject, this article focuses on poorly executed front end loading (FEL) steps in midstream activities. With growing clamour for clean energy globally, the midstream…
Loop-powered 4-20 mA Transmitter Circuit Voltage drop
Calculate the voltage drops in this loop-powered 4-20 mA transmitter circuit for the current conditions 4mA, 8mA, 12mA, 20mA. Loop-powered 4-20 mA Transmitter Calculate the voltage drop at different points…
How Engineers Effectively do Problem-solve and Troubleshoot?
The basic fundamentals and practical problem-solving skills required for the engineers to effectively troubleshoot the issue in the industries. Engineers Problem-solve and Troubleshoot Rely on principles, not procedures. Don’t be…
Liquid Level Switch Control Pump and Lamp
This pictorial diagram shows how a liquid level switch (with two separate SPDT switch units actuated by a common float mechanism) is wired to control both an electric pump and…
Determine Voltage Drops at Respective Flow Rates in Loop Diagram
In Flow Control Loop, Trace the path of current in the loop diagram signal wiring, then determine voltage drops at the respective flow rates. Examine the following loop diagram: Loop…
Pressure Control System Problems
A newly commissioned pressure control system has a problem: the controller registers a process fluid pressure of 22 PSI, but two pressure gauges connected to the same vessel both register…
Questions on Piping and Instrumentation Diagrams
In this post, we shared the 12 Questions on Piping and Instrumentation Diagrams related to the steam heat exchanger level & analytical control loop. In this process, maple syrup is…
Troubleshooting Pump Control Circuit
An electrician performs routine megger measurements on the electric pump motor. Read how the technician does Troubleshooting Pump Control Circuit? Troubleshooting Pump Control Circuit A lift station is an underground…
