WHAT IS THE Differance b/w on/off & pid control valve?
Answer Posted / jobby c johnson
on /off controller is a discrete state controller
whereas PID is an continous state controller
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
i want to find out iffco get test paper
what is difference between fork type and capacitance type level switch. where it is using
Explain Gas Turbine startup and shutdown sequences
how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?
installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,
if in a level tx height is given, how u calculate the ranges of the tx?
How many interlocks at turbine side?
where uses EXe /EXd/Exo/Exn/Exp/Exq/EXia
What is wet leg condition and why is it used?
Explain the working of rota meter.
(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.
why micro controller 8051/52's clock frequency is internally divide by 12 ?? and why it is further divide by 32 in UART serial communication ??
dear sir we have insatlled positioner model no.sipart PS2 make Siemens at our control valves . now problem is if we want to increase the response of valve opening speedy /fast. what parameters do we change for positioner ? any idea. please guide us.
how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?
What is standard procedure of manual mapping in Radar type level transmitter?