| ??? 11/30/07 13:11 Read: times |
#147641 - here is what I need Responding to: ???'s previous message |
Stefan Kanev said:
You have pressure sensor, which contains:
- primary transducer - analog&digital electronics . You have onboard some voltage (or other) precision refence , so You can make self-calibrate procedure/circuit for electronic part. This will eliminate errors as far as reference is stable. If You have tables/furmulaes for specific drift of electronics or reference, You can make corrections with these tables . If You have tables/furmulaes for specific drift of primary transducer, You can make corrections with these tables for corrections. But drifts ,caused in primary transducer by unexpected stresses , cannot be compensated this way in loaded condition . regards Kanev,What I mean to say is I am getting a pressure signal in terms of voltage after signal conditioning, now when I apply say 43psig pressure to the transducer(scale being 0 to 100psig) I get some reading , and now if I apply this 43psig to other sensor of the batch the reading would be different. Also two curves wont be same for different sensors ,I want to omit pots etc thats why I ask for some electronics or software solution to the prob , if you guys have tried that earlier. Best/ APC |
| 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 |