Fire and Gas system Audible and Visual Alarms
A fire alarm system has a number of devices working together to detect and warn people through visual and audio
What is Keyphasor ? How does Keyphasor works ?
A transducer that produces a voltage pulse for each turn of the shaft, called the Keyphasor. This keyphasor signal is
Proximity Transducer System Operation
Proximity Transducer System provides an output voltage directly proportional to the distance between the probe tip and the observed conductive surface. It
Objective Questions on Valves
List of Objective Questions on Valves, Valves Test Questions and Online Quiz on Control Valves. Test Your skills on Control Valves. Objective
What is Process Override Switch (POS)?
Process Override Switch shall be provided to override unhealthy field inputs in order to facilitate start-up, which shall automatically be
What is Maintenance Override Switch (MOS) ?
Maintenance Override Switch (MOS) shall be provided to override all field inputs designated to trip the facility in order to
Foundation Fieldbus Split Range Valves
In FOUNDATION Fieldbus systems (Note1), where a special software function block called “SPLT” exists to provide split-ranged sequencing to two
Emergency Shutdown System Philosophy
The Emergency Shutdown System (ESD) is designed to protect the personnel, plant, equipment and the environment against pollution. The purpose
How to Read Circular Chart Recorder for Flow Measurement?
Flow Transmitter output in square-root value and chart recorder prints flow value in range 0 to 100%. How to read circular chart recorder?
PLC Ladder Logic for Start-up Control of Boilers
The start-up control for the boilers is enabled via a master thermostat. PLC control is to be used to ensure