| ??? 06/11/05 10:46 Read: times |
#94677 - measuring resistance Responding to: ???'s previous message |
hello kai
i do know exactly what current is flowing through the pt100 but because i need to be able to calculate the resistance to 2 decimal places ie. 138.51 ohms which is the resistance is at 100 degrees and if i use ohms law to calculate the resistance from the known current from the current source and the measured voltage i would have calculated the resistance but it would be out by 4 or 5 ohms because the values for current and voltage values which is the current from the current source and voltage measured over the pt100 are only displayed and given to 1 decimal place so if you have any idea how i might be able to get around that i would be greatful |
| Topic | Author | Date |
| making a pt100 thermometer using a 8051 | 01/01/70 00:00 | |
| you are usually better off | 01/01/70 00:00 | |
| current sources | 01/01/70 00:00 | |
| TI (Burr-Brown) App Note SBAA050 | 01/01/70 00:00 | |
| That's great | 01/01/70 00:00 | |
| ads574 | 01/01/70 00:00 | |
| Indeed a very good link! | 01/01/70 00:00 | |
| calculating resistance | 01/01/70 00:00 | |
| Where are the problems, concretely? | 01/01/70 00:00 | |
| measuring resistance | 01/01/70 00:00 | |
| Use better mulitmeter... | 01/01/70 00:00 | |
| 2 multimeters | 01/01/70 00:00 | |
| max1410 | 01/01/70 00:00 | |
| Theoretical curve | 01/01/70 00:00 | |
| PT100 | 01/01/70 00:00 | |
| pt100s | 01/01/70 00:00 | |
| Look at LT1001data sheet | 01/01/70 00:00 | |
| wheatstone bridge | 01/01/70 00:00 | |
| Look at it this way..... | 01/01/70 00:00 | |
| anyone knows | 01/01/70 00:00 | |
| Keep it simple... | 01/01/70 00:00 | |
| So does Maxim | 01/01/70 00:00 | |
Already done... | 01/01/70 00:00 |