Alpha ko temperature coefficient kaha jata hai.. aur iska standard value 0.00385 hota hai...jab formula se temperature 'T' ko calculate karte hai Tho alpha ka value put karte hai 0.385 kyun ki hum jante hai 1 Ohms =1000 milli Ohms.. So 0.00385÷1000=0.385 maltha aur is value ko hum formula mein put karte hai... t=Rt-Ro÷Alpha(0.385)
Sir, es video me aapko RTD ka calculation pta chal gaya hoga, Thermocouple ka basic concept ke liye ye video dekhiyeru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-tP4F24_Yhyo.html
Sir, Pt200 ka Detail Calculation video jald hi upload hoga, In short Agar calculation krte hai to 0.77 se divided kijiye (Approx Temperature values mil jayega but it not exact value) Temperature=(200ohm-Measured Resistance of given pt200 RTD)/0.77
Nahi sir, RTD ka output Resistance value hota hai, jaise jaise Process line ka temperature badega waise hi resistance v badhta hai RTD ka , i.e Resistance is directly proportional to Temperature.
Sir bataya to uper comment me, As the Temperature increase/decrease the resistance of The RTD Element also increase/decrease, Because of the increase/decrease in resistance value ,we able to calculate temperature of Process line.