Answer / rajesh.

Potential contact means voltage is present on the point. As and when this point is make contact with another point the current will pass and circuit will draw current to load. Example relay contacts, electrical contactors etc.

Explain the use of hair spring in the pressure gauge.

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I am an intru engg frm pune n completing mba marketing in may 2010, what kind of profile would best suit my educational qualifications??? Also, i will move to US in jan 2011, so this job experience should count Over there too 'coz i want to continue workin even there....

1 Answers  

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capillary type tranmitter using remote seals and capillary tubes filled with liquid of known of known density so if you wanna callibrate it just close block valve just before capilary @ high side & connect druck apply it's calibrated range pressure as normal calibration ensure low side block valve must be closed & if you asking commissioning so this is not a DP type pressure tx so simple if you wanna put in servie this tx just open high side block valve & than low side block same way i do it but still transmitter showing -13 ma.just tell me what i want to do ?

1 Answers   Gasco,

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wht is snap action switch?where it is used?is there any diff between snap action switch and normal pressure switch?

1 Answers   ONGC,

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what are the inputs (drawings) we need to prepare loop schematics??

1 Answers  

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How does work A temperature valve or fv control valve in process plz brief me

0 Answers   Jindal,

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What is Cavitation?

2 Answers   Gujarat Borosil,

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what is the significance of hook up

3 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 can a d.p. Transmitter be calibrated?

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what is the difference between PLC & DCS

17 Answers   L&T,

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

2 Answers  

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