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The modern process control demands more versatility in the equipment operation. Sometimes the process will demand more draft from a fan, or reduce a belt speed, others increase the feed from a rotary valve. These are some examples of the use of the Variable Frequency Drives in the industry.

VFD is the acronym for Variable Frequency Drive and there are multiple applications for a VFD in the industry. Their use has been increasingly spreading in different areas as the technolog...

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Some flow transmitters called Multi variable that's why they measures dp , p and temperature then through an internal equation calculates the flow rate taken in consideration the orifice data such as bore size , coefficient factor and so on. So, easily can get 4-20 mA corresponding to the flow rate. In the picture the method of calibration of FT device using hand pump applying manually the requested pressure through a measurement device to verify their readings.

Ex. Fully compensated transmitter Rosemount MV3051

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Switch gear board.

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Effect of electric current on body

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Different fieldbuses offer different sets of features and performance. It is difficult to make a general comparison of fieldbus performance because of fundamental differences in data transfer methodology. In the comparison table it is simply noted if the fieldbus in question typically supports data update cycles of 1 millisecond or faster.