what does it mean an active front end in vfd plz explain it briefly

0 Answers  

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How can we say that accuracy of measurement increases by using 3 or 4 wire RTD? because for example: If resistance of RTD element is say r ohms and Resistance of the cable from transmitter to RTD is R ohms And if 4 wire RTD is used, ____._____________________ R ohms | |_____._____________________ R ohms / \ / r ohms \ \ | |______.__________________ R Ohms | |_______._________________ R ohms Then the actual resistance measured will be: Total = r + R/2 + R/2 = r +R Ohms Note: r+R instead of r ohms. hence error

2 Answers  

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What is differnece between leveltroll and interface leveltrol?

2 Answers  

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can we replace a slot sensor (inductive type) with limit switch (potenial free contact / no-nc type).

0 Answers   Max India,

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what is the working principle of hydra step(electronic level indicator)?

2 Answers   Bengal Energy, Lanco,

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in plc source and sink meaning?

1 Answers   CGL,

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How to find out the current of two motors having same power consumption but different RPM?

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Hi Friends i need Electronics&Instrumentation Engg question papers for BARC written test by coming 20th May 2008 pls post ur use full info to kkumarei@gmail.com. Or for suggestions pls give one missed call to 9962122264

0 Answers   BARC, Wipro,

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what is dry leg and wet leg in transmeter calibration?

3 Answers  

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Is there any interfacing sofware to build communication between a PC and ER300P model L&T make trivector meter via RS485 port which is available in the meter and is there any data acquisition card available to store the acquired data from the meter into the system

12 Answers  

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As an industrial instrument technician what we have to know?

3 Answers  

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How hart protocol can be connected with control valves?

0 Answers  

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