Answer / iyyappan.m

Open loop is a only one transmitter here is no control of valve or anything.

Closed loop is a Pid loop ,transmitter control the control valvewith operator desired setpoint.

what is span value and zero ? and how set ?

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Isometric drawings are generated during _________________ phase of a project

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What is safety barrier and how it is work

2 Answers   IOCL,

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how the actually positioner of control valve working? where we gave 3-15psi pressure to I/P converter where it is firstly applied ?- on I/P to positioner then what happen? is control valve operate on 3-15 psi or its bench pressure?

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what is pico fuse? how this different rom othe fuses and how to locate it inside the card?

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we are using centum vp as monitoring with Dell precision work station T3600 but some times PC(s) are restarted automatically . how we can solve this problem? thanks

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What is the difference between bench set and operating range i control valve?

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Why do we need to install hook-up line differential pressure type level transmitter when the differential pressure type level transmitter with capillary are available?

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why we use by pas on a positioner? When can a by pass be not used on a positioner ?

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Basic working principle of control valves

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