Answer / amit patil

YES ALL INTYRENSIC SAFE TRANSMITTERS R BOUNDED WITH ZENSER
BARRIERS BECAUSE THESE R HAZARDOUS SIGNALS COMMING FROM THE
FIELD, SO TO AVOID ANY DANGEROUS EFFECT TOWARDS THE PANNEL
SIDE BARRIERS R USED THESE R SO THAT IF MORE CURRENT IS
COMMING FROM YHE FIELD THEN THE BARRIER BECOMES OPENE TO B
SAFE FOR PANEL SIDE.

Answer / suresh

For safety of DCS input card. Possibility for short circuit or high current came from field so berrirer working as fuse it will get open so current not pass to card.because card

warning lamp does not light, but it does light when the wire from the lamp going to the sending unit is grounded (the part that plugs into the sending unit) what does this indicate)?

1 Answers  

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In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.

1 Answers  

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, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.

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what is pt100 RTD, and does 100 stands for

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Explain operation of Haskel pump.

0 Answers   CCIE,

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What is Erosion in a control valve?

0 Answers   CCIE, Fisher,

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Anybody know how to create a ladder programme for power switch in TV remote without using counter... ie TV can be turn on and turn off using single push button switch... on pressing the switch first time TV turn on and hold the on state till i press the switch again, and after TV turn off.

2 Answers  

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diffrence b/w accuracy and precision?

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what is ZERO SUPPRESION and ZERO ELEVATION?

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for oil & gas industries which zone is normally preferred? why? give its example?

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what is the input to be given in digital flow meter during the the calibration time?

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what is the difference between 3,4 wire RTD sensor?

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