What is the difference between Error and Offset.
Answer / senthil ramanujam mohan
I can give you simple example:-
Consider a temperature controller(on/off valve),
setpoint - 100deg
Offset - (-4)
dead band - 2
ERROR - SETPOINT - ACTUAL VALUE
If temperature raises from 90deg>>>>94>>at >96degrees the
valve closes.this is becoz we have an OFFSET of (-4
degrees)(setpoint - offset value)
So,now the valve is closed.temperature drops down from
96degrees<<95<< at 94degrees the valve starts open.this is
becoz we have a DEADBAND of 2degrees.
Error(contrl valve):-
setpoint - 100degree and actual value - 90degrees.
temp range - ( 0 to 200)for error scaling(becoz
controller works from 0 to 100%)
error scaling = 100/200 - 0.2 which is multiplying
factor for error to the controller
Finally,
ERROR = [ SETPOINT - ACTUAL VALUE ] X ERROR SCALING.
[ 100 - 90 ] X 0.2
[ 10 ] X 0.2
2.
hope you guys understand.
Is This Answer Correct ? | 4 Yes | 15 No |
What is difference between radial vibration and axial vibration explain in detail .
Q- In the process of checking AC through Phase Tester our body is the part of circuit but we don't recevie Shock, Why ?
what is the different between plc and dcs ? I know full name of this two but I want to know what structure and working style and speed I/O capacity and controller difference?
what is the procedure of O2 sensor(ABB) calibration?
I will attend an interview with GasGas company for a position of Instrument Technician ( Offshore )in next month can anyone tell me what questions they will ask. Thanks in advance.
ON RADAR INTERFACE LEVEL TRANSMITTER IF DI-ELECRIC IS WRONG WITH CONTINIUS PROCESS THAN HOW CAN INDENTIFY OR HOW CAN I PUT NEW DI-ELECTRIC VALUE?(ROSEMOUNT-TDR-3300-COXIAL PROBE TYPE)
units of pressure,flow, level,temperature? principle of pressure gauge? calibration of pressure tx., level tx., temperature tx.flow tx.? description of two wire ,three wire and four wire R.T.D.? WHAT IS INPUT AND OUTPUT OF TX.? WHAT IS INPUT AND OUTPUT OF R.T.D. AND THERMOCOUPLE? WHAT IS HOT LOOP AND COLD LOOP? WHAT IS INPUT AND OUT PUT AND OUTPUT OF D.C.S. AND P.L.C.? PRINCIPLE AND WORKING OF HART? WHAT IS PNP AND NPN PROXY? CALIBRATION OF PRESSURE ,LEVEL ,FLOW SWITCH? DESCRIPTION OF FIELDBUS FOUNDATION? WORKING OF SOV.?
I have one DP transmitter of range 0-500mmWC i have to calculate its range in M3/hr for flow measurement so whats the formula.
how to calibrate any tansmiter by loop or hart calibrator
where cn i find the previous years question paper for psu exam???????//
how to relay switch sense the fault?
How to convert 0-2500mmH2o into kg/hr? Or how to convert mmH2O into kg/hr,t/hr etc