Interface Level Measurement using DP Transmitter
Differential pressure (DP) transmitters are used to measure the interface of two fluids that have different specific gravities (S1 & S2). To make an interface measurement, the overall level must…
Displacer Level Transmitter Questions
Displacer Level Transmitter Question : Determine a basic 5-point (0%, 25%, 50%, 75%, and 100%) calibration table for the displacer level transmitter in this scenario: The cylindrical displacer weighs 9…
Flow Transmitter Rangeability
Flow Transmitter Rangeability is usually defined as the ratio of maximum flow to minimum flow the transmitter or sensor can measure.
Special Purpose Diodes Interview Questions & Answers
1. Explain what is a zener diode? Zener diode is a p-n junction diode specially designed for operation in the breakdown region in reverse bias condition. 2. Explain what is…
Convert 4-20ma current output to foundation fieldbus
Here we are discussing about how to convert smart transmitter HART type output current 4-20ma into foundation fieldbus signal. The block diagram for connecting smart transmitter to FF device. Terminal…
Boiler Drum Level Transmitter Calibration
Steam Drum Level is both a critical and difficult measurement to make. Control of the water level in the drum must be precise. A water level that is too high…
DP Flow Transmitter Re-Ranging Calculation
DP Flow Transmitter Re-Ranging Calculation is used to find the DP Flow transmitter revised flow with Existing DP, Existing Flow & New DP.
Instrumentation Symbols Legend
Piping and Instrumentation Diagrams (P&IDs) use specific symbols to show the connectivity of equipment, sensors, and valves in a control system. These symbols can represent actuators, sensors, and controllers and…
Calculate Process Temperature using a Thermocouple
Suppose you walk up to this thermocouple, installed to measure the temperature of an enclosed process vessel, and connect a sensitive voltmeter to the terminals at the junction head: Determine…
Calculate the Thermocouple’s Measurement Junction Temperature
Type K thermocouple A type K thermocouple is inserted into a process, with a digital multimeter connected to its terminals. The ambient temperature at the DMM’s test lead connections is…