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 Categories >> Engineering >> Instrumentation
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Question Asked @ Answers Views     Select
what do you mean by smart instruments ? define ? give an example?    1  113
How to calibrate and check thermal mass flow meter of Make thermal instrument company inc model 60?    1  86
Can I calibrate the Electromagnetic Flow Meter on line and How.    0  68
Lube oil pressure transmitter local it's showing 9.8 kg/cm2 but dcs side it's showing 9.26 like that what is the reason?    3  638
how to convert % to ma    1  383
what is differance  between SOE an alarams    1  254
How to convert m3/hr in tonnes/hr    1  435
how many types of preheaters are in cement industry & what r they can any body explain?    0  69
How can I map a tank?  Tank 15m h and 42m dia. we just fixed radar type lit. its reading shows over range. Now its required mapping ?    1  265
I am using 971 Enraf radar level transmitter for LPG tanks ,the tank side indicator gives the error code 999999999FL can any body give me any diagnostic for this issue?    0  108
Can u tell me the principle of the tc,rtd,level switch,pressure switch ,transmitter(pr flow level temp.),vibration...plz    0  149
How to Calibrate the magnetic flow meter on site ?    1  168
How to calibrate DP transmitter by using HART communicator ?    1  628
What is the reverse action and direct action    1  532
Anybody can tell me  how to convert mmHg2o /psi to scfm  please give me formula of conversion    0  99
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Un-Answered Questions
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what step is taken for ESD ( emergency shut down) in DCS REPLY to 567
what is moisture probe? What are there types? What is there working principle and how they works? guys this is one of technical question I had ask in interview. If you know its answer please let me know. The interviewers were more interested in microwave moisture probe, so if you find its any link please just forward me on my mail Thanks in advance. 365
Basic working principle of control valves 222
how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..??? 380
Senior engineer's please help me, what is Loop Checking and Loop test? and write difference also? soon urgent 398
Draw a P& ID showing – orifice flange, plate, dp transmitter, isolation & bypass valves and tubing. 213
Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72 448
hello sir/madam, I,Subramanian need 5yrs placement papers of officer trainee of Instrumentation technology.pls send to this mail id please do the needful. with regards, subramanian.v 402
In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits. 1231
Positioner usage. 242
Good evening all I need a small favour regarding reliance paper i wanna probable sample papers(e&i) of reliance. if any of u have any idea about dis then plz mail me back.i belongs to electronics and instrumentation i need e&i papers. thanking u.... 490
how to define the P,I,D value in tuning pid loops in online. 491
What is Cavitation in a control valve? 355
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 = 334
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