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I have a orifice installed in plant which is design for 0~100 inH2O for 0~80MMSCFD, now due to process change the maximum flow is change to 120 MMSCFD so for this new process value what will be the DP across orifice.  0  8
can i calibrate DP transmitter online (while Tx in Service) if yes ,how? CEPC  1  21
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition. MNC  0  34
How to convert mA into Percentage? KNPC  3  489
How a oxygen sensor & analyzer work at boiler or furnace, whatâs the principle & science is beyond this, How O2 sensor scene & convert signal & move toward analyzer & analyzer show reading in percent? GS-Engineering-Construction   0  41
which type inter lock use in petrochemical refinery,and oil & gas?  0  49
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?  0  40
Instrumentation Safe Guarding test. How to determine the interval time of the test. eg:Halfyearly,Every year,Every three years etc.  0  64
Hot calibrate a level transmitter (wet & dry legs)? IEC  0  90
why any measurement made interms of pressure is more accurate ? to be more precise most of the flow velocity is made interms of pressure and it is accurate. what is the reason behind pressure measurement being accurate ? NATPET  0  57
what is control valve and how is work Descon  3  519
My rtd working well at the same time r/i converter is not working properly.when power is given to rtd..it is giving 30mA and getting 2.4 mA if i remove the compensate leads No matter how many ohms.why it is happening like so?what is the solution?rtd range-0-200deg c& 4-20 mA o/p.please give me solutiin anyone......  1  164
flow transmitter range is 0 -500 mmwcc but the transmitter shows 12 ma for o mmwc instead of 4 ma ...how to solve this problem when we apply 375 mmwc it shows 16 ma  2  457
In close vessel/ drum why we use d.p. transmitter of -ve range i.e. (-)500 to 0 mmwc. Voltech   1  639
What is critcal speed. what is resonant frequency. why we want to cross crtcal speed on higher RPM (early).  0  84
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can any send me a forbes marshall dtron 316 manual 68  
Displace type LT to be calibrated in workshop, wt. 40, dia- 60 mm, density- 0.8kg/cm3. 58 CCIE
what is sil (safety integrity level 162 Essar
how to work static pressure sensore how to work dpt 98  
Can anybody tell me how to select the size of earthing cable for DCS & PLC system.Please tell me any relevant answer here or mail it to me. 308 Essar
sir, i preparing hpcl,ongc,barc,hal exams(instrumentation engg)pls send a placement papers 492  
What inherent design and operating principles are included in a modern control system to use predictive maintenance practices to increase overall system reliability? 230  
Describe the function of Accumulator into the Pump 96  
dear friends, i have seen flow as the selection critriea in presure guage (bourdon tube) and i would like to know what is the relation between flow and performance of pressure guage other parameters i found in the data sheet are pressure max. 1ksc temperature max. - 50 deg c line size - 80NB operating range - 1ksc pr. guage range - 0-2 ksc thank u, 176  
we have a s-5 simense plc having op7 .recently on op7 showing error 1.plc not present 2. DB error frequently. can u have any solution . please send me. 910  
for oil & gas industries which zone is normally preferred? why? give its example? 126  
sir i m preparing for BARC but i am not getting any papers to prepare for this exam so please send me some sample papers to my i.d for the preparation of barc. 505  
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