Interested to Buy Any Domain ? << Click Here >> for more details...
Determine the manipulated variable, controlled variable,
and the measured variable given a description of various
typical industrial processes.
- 6 Answers
- 43457 Views
- Honeywell, I also Faced
- E-Mail Answers
Answer Posted / ecxlsync
* Manipulated variable is the one being manipulated by the
final element(usually control valve) to correct the error.
* Controlled variable is the one being controlled or the
desired process value according to the SP.
* Measured Variable is the output of the measuring device.
example water temperature control:
there is a heat exchanger. the are 2 inlets of this exchanger
which is hot and cold water. the hot water must be cool down
when it leaves the exchanger at a certain temperature being
defined by the SP. a control valve installed at the cold
water inlet line to control the flow of cold water. the cold water flow at the control valve downstream is the MANIPULATED VARIABLE. the temp of hot water discharge from exchanger which has attained the setpoint value is the CONTROLLED VARIABLE.
| Is This Answer Correct ? | 35 Yes | 4 No |
Post New Answer View All Answers
How to calibrate Toxic gas detector?
Why upper weighing limit of electronics balance is 90% of the total weighing capacity?
What is difference between differential pressure & delta pressure?
what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.
In Safe Guarding test what means by "Failed to Danger" ?
pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.
1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling
Describe the function of Accumulator into the Pump
Identification of control valve parts.
Programmable Logic control.
please tel me the calibration of pneumatic controler.
1. what is modbus cable? 2. what kind of communication we are using for the interface of DCS, ESD and Third party cabinets? 3. What is serial communication and peer to peer communication?
How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.
what is piezoelectric transducer?give an example in power plant n state its principle?
what is interface level measurement.who can calibrate interface level measurement transmitter online
