Interested to Buy Any Domain ? << Click Here >> for more details...
1,why we use 4-20 ma output of all instrument qhy not use 0-
20,
2,what is the different between PLC & DCS.
3,how can we meaure maximum span of new flowmeter if not
given any information.
- 4 Answers
- 12472 Views
- Reliance, I also Faced
- E-Mail Answers
Answer Posted / rohan g
0 to 20 vdc signal may detoriate over distance but current
signal will remain intact.
noise will not affect current signal at all but vdc signal
will get affected.
if equipment fails then also it gives 0 vdc signal in case
of 1 to 20 vdc.but not in case of 4 to 20 ma.
DCS can be viwed as bigger version of PLC.Since no i/p dcs
can support is more in case of dcs.Also dcs can have
operator interface but plc dosent have such.
| Is This Answer Correct ? | 17 Yes | 5 No |
Post New Answer View All Answers
What is Span Error
What is instrumentation instrumentation engineering?
What is hp & mp seperator .& what is its working principle ?
How to calibrate Field bus transmitter? procedure ?
Explain signal isolator
please tel me the calibration of pneumatic controler.
please send the sample qustion paper for iocl written test ..
I faced several time siemens ps2 positioner automatically getting Chang in it's set point direction after auto calibration So is there any causes biside this or any permissives ?
1)How many tpes of vibration probe and how many tpyes of vibration. 2)how we can calibrate a vibration probe with tk3 3)what is RMS value in vibration measuring application and how we calculate it.
Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.
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
What is the GK Value in Flowmeter?
What is difference between “Fault Tolerant” & “Fault avoidance” PLC? Application where these system s are used?
Can Any body tell me about the Contact or Email id of any good Consultancy which help me to find a job in Instrumentation Field in India .I have Six years of Work Experience in the Same field.Please revert me back on shammi_gwalior@yahoo.com ?
A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?
