Facts on Thermowell Insulation Thickness
Can Insulation Thickness affect Thermowell U-Length ? Thermowell Tip must be at least 2 mm immersed in Liquid whose temperature is to be measured (As per API 551) In 2-phase service…
Why is Orifice Beta in between 0.3 to 0.7?
Why we must keep the Orifice Beta ratio between 0.3 to 0.7 values during orifice calculation, orifice design, and selection?
Transmitter Minimum Span, Accuracy & Turndown
Relation between Minimum span, accuracy & Turndown in Transmitters with a practical example Before explaining minimum span & Turndown, lets start by an example highlighting Maximum span of sensor. Suppose…
Scaling with Parameters (SCP) Instruction in PLC
To study the working of Scaling with Parameters (SCP) Instruction in Allen Bradley programmable logic controllers (PLC). Scaling with Parameters (SCP) Instruction Block Name: SCP – Scaling with parameters In…
What is Live Zero in 4-20 mA Current Loop?
The popular myth about 4-20 mA, debunked. A lot of C&I practitioners (including me) has long believed that the establishment of 4 mA as the lower range of the widely…
Ladder Logic for Flow Meter Totalizer
This is a PLC Ladder Logic to calculate the flow rate and also count the total flow or totalizer. Flow Meter Totalizer By using some math, bit and comparator functions,…
Burner Management System Logic and Interlock
Burner Management System (BMS) automatically initiate a safe operating or shutdown sequence to prevent an explosion from occurring inside furnace.
What is Turbine Supervisory Instrumentation (TSI)?
The Turbine Supervisory Instrumentation or TSI includes those measurements which monitor the behavior of the rotor train assembly. These include the speed, vibrations, axial position, and differential expansion of the…
Gap Voltage of Bently Nevada Vibration Probe
Gap voltage (VDC) is a direct representation of distance between the probe’s tip and the shaft’s surface. This is the quiescent voltage that needs to be adjusted between the proximitor’s…
PLC Program to Control Gas Pressure using Closed-Loop
By using AC Drive and Closed-Loop Control Program in PLC, we have to control output gas pressure as per setpoint given in SCADA. Implement this program in PLC using Ladder…
