What is NAMUR NE 43 ?
Well NAMUR NE 43 is in trend to be mentioned with 4-20 mA output. It is said it increases diagnostic features ? But what can you do more in 4-20...
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Instrumentation Engineering Standards
Hazardous Area Classification Questions
Hazardous Area Classification Questions What is a hazardous area? A hazardous area classification is one in which concentrations of flammable substances are present or can be expected to be present....
Transmitters 4-20mA Current Failure Alarm Limits
4-20 mA instrumentation and controls usually support a signal range slightly below 4 mA and above 20 mA. For transmitters, current values below 4 mA and above 20 mA are...
Analytical Standards
An analyzer measures intrinsic properties of a substance sample such as its density, chemical content, or purity. Whereas the other types of instruments discussed in this chapter measure quantities incidental...
Pressure Standards
In order to accurately calibrate a pressure instrument in a shop environment, we must create fluid pressures of known magnitude against which we compare the instrument being calibrated. As with...
Classified Areas and Electrical Safety Measures
Any physical location in an industrial facility harboring the potential of explosion due to the presence of flammable process matter suspended in the air is called a hazardous or classified...
RTD Standards
RTD Standards A resistance temperature detector or platinum resistance thermometer works on the principle that the electrical resistance of a metal changes in a significant and repeatable way when temperature...
What is IEC 61508 ?
What is IEC 61508? IEC 61508 (previously IEC 1508) is a seven-part standard that defines specific direction and guidelines on the functional safety of electrical/electronic/programmable electronic (E/E/PES) safety related systems....
What is HAZOP ?
HAZOP- an abbreviated term of “HAZards and OPerability”- is defined as: “The application of a formal systematic critical examination of the process and engineering intentions of the new facilities, to...
Purge & Pressurization Systems Interview Questions
Purge & Pressurization Systems Interview Questions What is purging? Purging is the process of supplying enclosures with compressed air or inert gas at the proper flow and pressure in order...