Answer / sanjay

t/c and rtd use for tempreture measurement.

Answer / deepak nayak

A thermocouple consists of two conductors of different
materials (usually metal alloys) that produce a voltage in
the vicinity of the point where the two conductors are in
contact. The voltage produced is dependent on, but not
necessarily proportional to, the difference of temperature
of the junction to other parts of those conductors.
resistance temperature detectors (RTDs), are sensors used to
measure temperature by correlating the resistance of the RTD
element with temperature. Most RTD elements consist of a
length of fine coiled wire wrapped around a ceramic or glass
core. The element is usually quite fragile, so it is often
placed inside a sheathed probe to protect it.The material
has a predictable change in resistance as the temperature
changes; it is this predictable change that is used to
determine temperature.

Answer / sathish

temperature

why the steam drum and deaerator level transmitter range is in negative MMWC to zero

3 Answers   Emerson, Jindal, JKPM,

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what is the basic working principle of I/P and Positioner in any control valve.

12 Answers   Essar, Visa Steel,

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Why thermo wells are used?

1 Answers  

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Is it possible to drill additional gland hole in EExd or EExe JBs? What are the points to take care?

2 Answers  

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how u meassure room temp?is it possible 2 meassure room temp by rtd or thermocouple?between rtd n thrmocouple which is more regard?3 meassure diff. between rtd n thermocouple?

3 Answers  

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can you provide me full detail about instrumentation in ONGC??

0 Answers   BRML, ONGC,

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What is cv of control valve

4 Answers   Cadila,

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what is your eligibility criteria for freashers?

0 Answers   Satyam,

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What is sensitivity of K type thermocouple? Is polarity important in thermocouple connections?

3 Answers   Honeywell,

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Why we use mmwc unit for pressure

3 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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Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

0 Answers  

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