Answer / v.poornachandran

A distributed control system is computerized control system for a process or plant usually with a large number of loops,in which autonomous controllers are distributed throughout the system

i want to measure temp of hot sand(welding flux) in closed chamber(around 150 deg C).Which is better thermocouple or thermometer?

1 Answers  

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In case of Transmitter's(e.g.Ultrasonic Flow meter ) we have an normal practise of selction of upstream and downstream distance such as (20D and 5D ).can anyone please let me know whow to calculate "D" ?? i guess it refers to pipe thickness is t right ?

2 Answers  

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i am working in thermal power plant . if temperature transmitter is not showing reading in dcs then how can we rectify the problem?

8 Answers   TATA,

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1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

0 Answers  

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in mass flow meter what is drive friquancy ?

0 Answers  

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Someone please do mail me some instrumentation questions for Hindustan Petroleum test to avinalexander@gmail.com .Really would be gateful if someone could help me

3 Answers   HPCL, Immersion, IOCL,

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How d.p. Transmitter can be applied to close tank?

0 Answers  

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In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

0 Answers   Reliance,

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what is droop mode n frequency mode in wood ward governor?

1 Answers   TATA,

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what is DCS?

24 Answers   Reliance, SWCC,

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Advantages of servers over normal desktop in PLC SCADA system

1 Answers   InfoMedia,

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What is the logic a Transmitter control a Control Valve? How the signal going to the Control valve? What are systems/Panels/cables/signal used to control valve from Transmitter?

3 Answers  

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