Notes on Instrument Ranging
An important configuration parameter for any practical measurement or control system is instrument process variable ranging. This entails setting both the transmitter and indicator/controller to a specified measurement range, with…
Common Mistakes in Instrumentation
This article shares the Common Mistakes in Instrumentation when working with transmitter, valve manifolds, multimeters, fault troubleshooting. The purpose of every troubleshooting exercise is to foster and assess your ability…
What is Inter Discipline Check (IDC)?
Inter Discipline Check (IDC) is an activity done by Design Engineers in Plant Design Companies. IDC is performed to ensure that the design and engineering output including supplier documentation is…
Intrinsic Safe Calculation
The intrinsic safe calculation is an activity done by Instrumentation Engineers in EPC or EPCM Industries. In this article, we shall see why is it done and How to do…
Common Mistakes to Avoid When Using Dead Weight Tester
Dead weight testers are devices used to generate known amounts of fluid pressure, to be used as standards for calibrating pressure-measuring instruments. When properly configured and operated, the fluid pressure…
Metric Prefixes and Unit Conversions
Metric Prefixes Yotta = 1024Â Â Symbol: Y Zeta = 1021Â Â Symbol: Z Exa = 1018Â Â Symbol: E Peta = 1015Â Â Symbol: P Tera = 1012Â Â Symbol: T Giga = 109Â …
Problem with Pirani Gauge
A Pirani gauge is a special pressure instrument designed to measure very low pressures (i.e. hard vacuums). It uses two electrically heated filaments, one of which is sealed in a…
Differential Capacitance Pressure Sensor Circuit
An ingenious circuit used to generate an electrical voltage signal from a differential capacitance pressure sensor is the Twin-T diode circuit, shown here connected to a Rosemount-style differential capacitance pressure…
Pressure Transmitter using Potentiometer and Diaphragm
Shown here is a very simple pressure transmitter, a device that measures a fluid pressure and converts that measurement into an electrical signal: Suppose the potentiometer wiper will be at…
Indentify Faults in Simple Lamp Circuit including Failed Wires
Suppose the lamp refuses to light up. A voltmeter registers 24 volts between test points C and D: Simple Lamp Circuit First, list all the possible (single) faults that could…
