| ??? 01/20/10 07:55 Read: times |
#172608 - making it Responding to: ???'s previous message |
Stefan Kanev said:
Hi, Ap,
You could show full datasheet , but You did not. So i assume it is tensoresistive bridge load cell. Output is untypically high - it can be because quality is very high, because design is strange, because quality is low , or because it is not standard tensoresistive bridge - for example, can be some semiconductor type. Let assume is good loadcell, not very common. In this case recomended excitation of 20V is obsolete. 5V excitation is enough today for common tasks. Make first prototype with 5V, check results. Common ADC for handling loadcells can work withowut problems to - let say - 3.9..4.2 V common mode. So You can up excitation to 7..8 V without problems. But i cant see reason for this , as i say - for common tasks and common load cells 5V excitation is enough. regards Stephan ,It belongs to some organization the datasheet is a printed material for this OEM . I could drop the excitation till 15V where it works good and below it looks non-linear . Yes conventional Load cells are not a problem. Regards -Ap |
| Topic | Author | Date |
| Isolating xducer | 01/01/70 00:00 | |
| not even a way | 01/01/70 00:00 | |
| noise | 01/01/70 00:00 | |
| I wouldn't do that... | 01/01/70 00:00 | |
| agree | 01/01/70 00:00 | |
| when within specified range!!! | 01/01/70 00:00 | |
| why 8V or 20V | 01/01/70 00:00 | |
| no specs violated | 01/01/70 00:00 | |
| that is TOTALLY irrelevant | 01/01/70 00:00 | |
| Jumping to conclusions | 01/01/70 00:00 | |
| AC modulating the bridge excitation voltage? | 01/01/70 00:00 | |
modulating the excitation | 01/01/70 00:00 | |
| make it simple at start | 01/01/70 00:00 | |
| making it | 01/01/70 00:00 | |
| o, i see... | 01/01/70 00:00 | |
| from my experience with loadcells ... | 01/01/70 00:00 | |
| what is exactly "xducer" ? | 01/01/70 00:00 | |
| Offsetting a signal | 01/01/70 00:00 | |
| Yes but...? | 01/01/70 00:00 | |
| Error analysis and budget | 01/01/70 00:00 | |
| Common Mode suppression | 01/01/70 00:00 |