| ??? 12/23/04 22:21 Read: times |
#83743 - Steve -accuracy Responding to: ???'s previous message |
My project used a ADuC for strain gauge conversion. I used the +/-40mV range with external reference (measurement was ratiometric so the reference is the 5v rail). I get about 16bits of stable reading at 20hz conversion rate. The lesson learnt with this project is that sigma-delta converters take a few cycles to give an accurate reading when you switch the inputs (I had 4 inputs switched via a mux) - 4 samples seemed to be about right to give an accurate conversion after switching the input. I can't comment directly on thermocouple performance. The AduC has an inbuilt temp sensor but it was reading 33degrees the other day when the ambient was about 23 degrees - so chip heating maybe an issue. |
| Topic | Author | Date |
| Low cost controller for temperature | 01/01/70 00:00 | |
| Why a processor ? | 01/01/70 00:00 | |
| Who is Wy? | 01/01/70 00:00 | |
| Temp controller | 01/01/70 00:00 | |
| When you can buy why make ? | 01/01/70 00:00 | |
| When you can buy why make ? | 01/01/70 00:00 | |
| Can be done by Double-OPamp | 01/01/70 00:00 | |
| DIY | 01/01/70 00:00 | |
| the other details. | 01/01/70 00:00 | |
| DIY , Other details | 01/01/70 00:00 | |
| CJC | 01/01/70 00:00 | |
| CJC | 01/01/70 00:00 | |
| You haven't had a look at the link??? | 01/01/70 00:00 | |
| CJC | 01/01/70 00:00 | |
| Accuracy ? | 01/01/70 00:00 | |
Steve -accuracy | 01/01/70 00:00 |