Answer / m.murali- inst.technologist

Rate of frequency of vertices after the bluf body is
directly propositional to flow

Answer / sanjay lashkari

vortex flowmeters utilise the phenomenon called vortex
shedding that occurs when a fluid flows against a
non-streamlined obstruction, termed a bluff body. the
peripheral layers of the fluid are unable to follow the
defined contours of the bluff body & seperate from its
surfaces to form vortices that are swept downstream. (
kamran vortex street).
the shedding frequency is directly proportional to the free
velocity over a wide range of flow, excluding the laminar
region.
these vortices manifest themselves as sinusoidal pressure
variations.these pressure variations are converted in to
sinusoidal current signal.

Answer / k.surya mutyalaro

in fluid pipe the vertices generated by the bluf body is
directly propositional to flow...and this measrement can b
in any sort , like frequency and also resistance ... the
frequency by means of ultrasonic trx and rx.... resistance
is by strain guages...but this method is better for fluids
of turbulant , for laminar flows those instrument methods r
less sensitive to respond.

Answer / elsayem

when flow hit the bulf body it creates a vorteces
proprtional to flow

Answer / goldengineer14

The principle of a vortex flowmeter’s operation is based on a phenomenon of vortex shedding
known as the Von Karman effect of flow across a bluff body. A bridge pier in a river generates
Von Karman vortices. The principle states that flow alternately sheds vortices from one side to
the other side of a bluff body. The frequency of the shedding is directly proportional to fluid
velocity across the body. As a fluid passes the bluff body it separates and generates small eddies
or vortices that are shed alternately along and behind each side of the bluff body.
The output of the vortex flowmeters depends on the K-factor. The K-factor relates the frequency
of generated vortices to the fluid velocity. The K-factor varies with the Reynolds number, but is
virtually constant over a broad flow range. Figure 71 shows the relationship between two
numbers. The formula for fluid velocity is
Fluid velocity =Vortex frequency/K - factor

Answer / mrfa

It has crystal's inside when process pushes they create
milivolts .

Answer / mrfa

It has crystal's inside when process pushes they create
milivolts .

what is loop1 and loop2 in MTS LT?

0 Answers   SPGC,

I have observed in field instrumentation work... I remove the fuse of an analog transmitter then it shows 7.75 kg/sq cm (which is practically wrong value)in DCS and when put the fuse it shows 0 in dcs. Then cheach the field transmitter termination and found moister. clean that and then it shows 1.1 kg/ sq cm which is right value. Please describe the above phenomenon.

1 Answers  

Dear Sir/Madam, I am attending an interview for ETs in BHEL. I have cleared my written test under Electronics (Instrumentation). This is the first time I am appearing for an interview. Can any one who has attended the interview earlier give me a clue to face the interview. With regards Sindhu

2 Answers   Siemens,

i feel sq. pipe is better than round pipe pls give comment for this. advance thanks for reply

3 Answers  

List three types Level Switches with their working principles

0 Answers  

Explain about 4 wire instrument concept & tell about its wiring fron sensor in Field to PLC panel.Explain with an example?

3 Answers   IOCL,

State some of balance principle’ advantages?

0 Answers  

why is honed type flow orifice plate? what purpose it used? how to select this?

4 Answers  

In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

0 Answers  

Hi my friends Is any one who can assist me in knowing the typical interview questions for system engineer at General Electric pty Ltd

0 Answers  

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

4 Answers  

how the transmitter send MA?

1 Answers