what is the difference between RS 232,RS 485,RS 422, how
they different from each other

mr.binu
if answer is so,why we need a protocal changer from RS232 to
RS 485? ethernet is used for 100 mtr.to 1 km.for more than
one km we use optical fibre cable,in this case also we need
protocall changer to convert the signal.please clear it.

 Is This Answer Correct ? 14 Yes 11 No

Explain bernoulli’s theorem. State its application.

64

How to fix back the valve actuator stem

1077

How to change dcs card in online. (Dsc is maxdna)

1511

what is diffrance between FF & SMART, explain with difination

2159

you must show the examples application and give at least 4 types of transducer/sensors that can minimize the failure during the manufacturing of the resistors.

2186

Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

907

How to calibrate RC Feeder system in thermal power station?,If any instrument available to calibrate it,ple inform me. make:stock,

2174

we have level transmitter for h2s04 storage tank capacity 10k ,always there are failure of transmitter due to failure of magnetic floats ,please come up with solutions at the earliest.

982

on interface level transmitter model(RTG3302-EMERSON) What is threshold valve how can we select correct threshold value T1,T2,T3,T4 When interface water & hydro carbon

1129

what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail

770

What is heating effect?

1250

how pressure transmitter work, what is its principal to measure and how its generate signal. for pressure transmitterinstallation which precautions must be taken ??

735

How does temperature bath work? How does coil gets heated only by applying some current?

774

How to do gas analysers calibration in AUTO and Manually by using zero and span gas?

1379

How to erection of DCS Panel at site step by step

363