Answer / vaibhav v t

ATEX means Atmosphere Explosives.ATEX is europiean body for
issuing certification to instruments for thier use in
hazardous area/application.ATEX has specific marking on
instruments which mentions class, div, temp class,gas class.

Instrinsic safe means it is one type achiving safety for
usisng instruments in hazardous application.Electronics in
instruments is designed in a such way that energy generated
during spark inside is such low so tat it will not ignite
explosive gas-air mixture.All componenets are low power
feed.

why need 3 element system in power plant? if it is not there then what l happen?

5 Answers  

---

transmitter in 3 connection +,-,And test mode so how Use To Test Mode

1 Answers   Essar,

---

Explain about the leakage class of the control valves

0 Answers   CCIE,

---

What are the two states of a controller

3 Answers  

---

can you suggest good traning institute in instrumentation ? (in automation, or designing)

5 Answers  

---

can we change the range of 3151 model level transmitter of rosemount make? present calibration range is 1000mmwc and want to change it to 2000mmwc

4 Answers  

---

units of pressure,flow, level,temperature? principle of pressure gauge? calibration of pressure tx., level tx., temperature tx.flow tx.? description of two wire ,three wire and four wire R.T.D.? WHAT IS INPUT AND OUTPUT OF TX.? WHAT IS INPUT AND OUTPUT OF R.T.D. AND THERMOCOUPLE? WHAT IS HOT LOOP AND COLD LOOP? WHAT IS INPUT AND OUT PUT AND OUTPUT OF D.C.S. AND P.L.C.? PRINCIPLE AND WORKING OF HART? WHAT IS PNP AND NPN PROXY? CALIBRATION OF PRESSURE ,LEVEL ,FLOW SWITCH? DESCRIPTION OF FIELDBUS FOUNDATION? WORKING OF SOV.?

2 Answers  

---

What is first echo & echo window in radar type level transmitter?

0 Answers  

---

Specify eight technical requirements that you would consider important, when deciding upon a particular control valve?

0 Answers  

---

What is the role of integral in PID controller

3 Answers  

---

hi my name is rakesh patel i just complited my be in instrumentation & control now i am going to working as a validation engineer in a poject department so what is a scope in a future as a validation engginer ? what line is good for me can any bady give me complete solution please? your regard rakesh patel

0 Answers  

---

What is the formula To convert Degree centigrade to foranhight.

5 Answers  

---