4–20 mA Process Control Loops
In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a
In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a
4-20 mA instrumentation and controls usually support a signal range slightly below 4 mA and above 20 mA. For transmitters,
The Loop checking is defined as pre-Commissioning activity which is initiated after installation of instruments in the field and carry out the
The term “loop” can refer to the entire “control loop” from primary element (sensor) through the transmitter, and controller, to
Safety Integrity Level (SIL) is a measure of safety system performance – not a measure of process risk. The higher
Instrument air manifold or air distribution manifold is a pipe shaped chamber (manifold) with several branches of outlets for delivering instrument
In FOUNDATION Fieldbus systems (Note1), where a special software function block called “SPLT” exists to provide split-ranged sequencing to two
Unlike the discrete/digital (on/off) circuit, analog signals vary across a range of voltage or current. Taking the same vessel described
Instrumentation and control rely on converting physical or process variables into a more useful format for the operator display. Pressure
One of the most common questions is regarding the difference between DCS and PLC as well as between PLC and