Timeline for How does 3-wire RTD or resistance measurement works in bridge of wheatstone?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 11, 2018 at 16:37 | comment | added | Kono | Yes you're right | |
| May 11, 2018 at 16:32 | comment | added | Andy aka | OK I see what you mean. I get where you are coming from. Yes, if the ratio of R1 to R2 is not 1:1 then a three wire measurement will not work because RLa and RLb would need to be different. | |
| May 11, 2018 at 16:32 | comment | added | Kono | R1/R2 needs to be same (Rg + RL)/(R3 + RL) to balance yje bridge | |
| May 11, 2018 at 16:29 | comment | added | Kono | If i balance the bridge with Rg and R3 proportional to R1 and R2; but not identical to each other. The bridge balances; and adding RL to Rg and R3 disrupts the bridge; the bridge will unbalance. So RL does not get compensated | |
| May 11, 2018 at 15:56 | comment | added | Andy aka | If they are not the same but the bridge is balanced initially due to R1 and R2 being proportionately the same as Rg and R3 then RL does not factor into the equations for balance. To balance the bridge R1/R2 does not need to equal (Rg + RL)/(R3 + RL) - is that what concerns you? | |
| May 11, 2018 at 15:53 | comment | added | Kono | Who says that Rg and R3 is the same? | |
| May 11, 2018 at 11:00 | history | answered | Andy aka | CC BY-SA 4.0 |