| ??? 08/22/07 06:15 Modified: 08/22/07 06:19 Read: times |
#143497 - Correcting non Linearisation of thermister Responding to: ???'s previous message |
Hello Kaushik Khorasiya,
Here is a device I built to map out the thermistor. The program reads the temperature from a know good source DS1721 IC and then reads thermistor into an ADC. The output is converted to ASCII and output to a serial port at 2400 baud. The data is ASCII delimited so that you can use Microsoft excel to crunch it. You can then take the data and use it to show the correct temperature from a table stored in your program. http://members.aol.com/cpu8052/F6751721.gif Regards, Charles Bannister Ps. I wanted to do the in a 80C51 but could find anything convenient. 
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|
| 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 |