| ??? 12/01/07 14:16 Read: times |
#147691 - a miserable sensor, why the requirement Responding to: ???'s previous message |
1) Linearity (Error) < ±5% Line drawn from 0 to 50% force
2) Repeatability < ±2.5% of full scale Conditioned sensor, 80% of full force applied 3)Hysteresis < 4.5 % of full scale in another related thread you ask for 0.02% precision from an A/D that is ridiculous With the data shown above if this is a scale and I buy a kg of sugar either I or the shopkeeper will be cheated by up to 80g. you can compensate for linearity errors to a great extent you can not compensate for repeatabiliity errors you can compensate for hysteresis errors to some extent with some VERY well designed code you MAY achieve a precision of ~4%, I can see no one interested in such a product. Maybe I am totally off the rocker here and whatever you are making (why so secretive, we can help much better if you tell) will be quite satisfactury with such a lack of precision, if that is so, do tell. Erik |
| Topic | Author | Date |
| Self calibrating sensor | 01/01/70 00:00 | |
| calibrating without reference/standard? | 01/01/70 00:00 | |
| Ofcourse with reference signal present. | 01/01/70 00:00 | |
| What do You mind? | 01/01/70 00:00 | |
| here is what I need | 01/01/70 00:00 | |
| so go make... | 01/01/70 00:00 | |
| glue a cheap EEPROM to the loadcell | 01/01/70 00:00 | |
| glue a cheap EEPROM | 01/01/70 00:00 | |
| Max 1457 | 01/01/70 00:00 | |
| MAX1457 that makes .. | 01/01/70 00:00 | |
| EV kit | 01/01/70 00:00 | |
| EV kit for part Max1457 | 01/01/70 00:00 | |
| Link | 01/01/70 00:00 | |
Link --- this s/w works with XP | 01/01/70 00:00 | |
| FYI | 01/01/70 00:00 | |
| If they vary by 10%, ... | 01/01/70 00:00 | |
| again and again we see | 01/01/70 00:00 | |
| If they vary by 10%, ... | 01/01/70 00:00 | |
| a miserable sensor, why the requirement | 01/01/70 00:00 | |
| I dont require precision... | 01/01/70 00:00 | |
| Can anyone I dentify its manufacturer | 01/01/70 00:00 |