| ??? 10/26/06 01:35 Read: times |
#126993 - re: tradeoffs Responding to: ???'s previous message |
Russell Bull said:
You can choose to ignore cold junction compensation if you're not worried about a few degrees of error or just use a semiconductor temp sensor and compensate in the software. Ahh, ok, that makes sense. I thought the Cold Junction Compensation (CJC) was something fairly complex, but apparently it isn't. Initially, that was the main reason I was looking at using the AD597. Just have to add the measured TC temperature to the actual temperature to get the 'hot' TC temperature. I found an app note from Microchip re: Interfacing to a thermocouple, as well as doing the CJC in software from a seperate temperature probe. http://ww1.microchip.com/downloads...00844a.pdf Seems relatively easy, and much more feasible compared to going the SPI route. Thanks for the ideas, -Dave |
| Topic | Author | Date |
| Anyone know of 0v - +15v IIC ADC? | 01/01/70 00:00 | |
| an op amp will do nicely | 01/01/70 00:00 | |
| how so? | 01/01/70 00:00 | |
| Two temp sensors enough? | 01/01/70 00:00 | |
| probably | 01/01/70 00:00 | |
| Link | 01/01/70 00:00 | |
| interesting | 01/01/70 00:00 | |
| Tradeoffs | 01/01/70 00:00 | |
| re: tradeoffs | 01/01/70 00:00 | |
| tradeoffs | 01/01/70 00:00 | |
| Where would you mount them? | 01/01/70 00:00 | |
| Where are they mounted | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| Is that True | 01/01/70 00:00 | |
| Three thermocouples, actually | 01/01/70 00:00 | |
| final solution? | 01/01/70 00:00 | |
| Take care! | 01/01/70 00:00 | |
| good catch! | 01/01/70 00:00 | |
Curing caps... | 01/01/70 00:00 |