Answer Posted / patrik
field bus is the latest technology used in the process
industry for transmission of signals.it eliminates the heavy
wiring used in the traditional 4-20 mA transmission.it also
enables the manufacturers to use the latest SMART devices
avilable in the market .
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
POSSITIVE PULSE IS APPLIED TO AN INVERTER INPUT.THE TIME FROM THE LEADING EDGE OF THE INPUT TO THE LEADING EDGE OF THE OUTPUT IS 10 ns. THE TIME FROM THE TRAILING EDGE OF THE INPUT TO THE TRYLING EDGE OF THE OUTPUT IS 8 ns. WHAT ARE THE VALUES OF tPLH and tPHL?
How to fix back the valve actuator stem
please can any one tell me clearly about pid tuning i am confusing about this .how to tune pid easly?
Definition of reverse and acting controllers:
hello can yoy pls send me previous papers of jindalpower and steel ltd.....'m from instrumentation..... mani1048@gmail.com
how will you check torque value during Factory acceptance Test for control valve/ESD ON/OFF VALE how will you confirm this torque value is being correct, Which document will you be refer.
Boolean algebra
how to calibrate 0- 150 psi presure gauge by dead weght tester
what is effect of specific gravity in differential level transmitter , explain formula related with this .
What is the difference between PLC and DDC?
What is the meaning of wet leg
Calibration procedure for Electro magnetic Flow meter
draw the block diagram of a level transmitter ?
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 =
what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.
