| ??? 08/22/07 08:46 Modified: 08/22/07 10:25 Read: times |
#143505 - 1721 Responding to: ???'s previous message |
Charles Bannister said:
The program
reads the temperature from a know good source DS1721 IC The 1721 has an accuracy of only +/- 1 deg C, which may not be precise enough for his purposes. With decent thermistors, like ones from Honeywell's Unicurve series, the device specification is sufficiently tight, that you can derive the characteristics directly from the Steinhart-Hart equations - http://en.wikipedia.org/wiki/Ther...t_equation Steve |
| Topic | Author | Date |
| Thermistor Self-heating | 01/01/70 00:00 | |
| Error budget | 01/01/70 00:00 | |
| Use a bridge configuration | 01/01/70 00:00 | |
| Error Budget | 01/01/70 00:00 | |
| measurement point | 01/01/70 00:00 | |
| measurement point | 01/01/70 00:00 | |
| Math | 01/01/70 00:00 | |
| >Dissipation constant< gives the answer | 01/01/70 00:00 | |
| Amplify | 01/01/70 00:00 | |
| The Center is not the only factor | 01/01/70 00:00 | |
| Linearisation | 01/01/70 00:00 | |
| >Dissipation constant< gives the answer | 01/01/70 00:00 | |
| Getting closer | 01/01/70 00:00 | |
| Correcting non Linearisation of thermister | 01/01/70 00:00 | |
| 1721 | 01/01/70 00:00 | |
| Nice link | 01/01/70 00:00 | |
| Measuring thermistors | 01/01/70 00:00 | |
| Braggard? Show your work | 01/01/70 00:00 | |
| nope | 01/01/70 00:00 | |
| ADC selection. | 01/01/70 00:00 | |
| Depends on your application | 01/01/70 00:00 | |
| The Components | 01/01/70 00:00 | |
| Accuracy... | 01/01/70 00:00 | |
| What BETA? 3890K or 3575K? | 01/01/70 00:00 | |
This thread might be helpful for you | 01/01/70 00:00 |