| ??? 03/03/06 14:27 Read: times |
#111176 - and i guess Responding to: ???'s previous message |
thanks u all for the opinions...i thought about it..may be.. that when both connections were there , only a fraction of AC appeared accross the opamp terminal (thanks to voltage div nw) but when one of the connection snapped open, entire voltage appeared across the terminal. Please note that I had given a separate power supply (battery) to opmap and this was not in anway connected to the AC mains I was measuring,since normally DVM uses battery. I had not connected the neg of batt supply to common of AC line for common ground. |
| Topic | Author | Date |
| measuring AC voltage | 01/01/70 00:00 | |
| It's all about the power | 01/01/70 00:00 | |
| Divider in the MOhm range, cap, RMS | 01/01/70 00:00 | |
| NOT isolated | 01/01/70 00:00 | |
| well.. | 01/01/70 00:00 | |
| may be | 01/01/70 00:00 | |
| Fuse ??? | 01/01/70 00:00 | |
| But... | 01/01/70 00:00 | |
| smoke escape | 01/01/70 00:00 | |
| and i guess | 01/01/70 00:00 | |
| Even more strange! | 01/01/70 00:00 | |
| Aah! | 01/01/70 00:00 | |
| may be not | 01/01/70 00:00 | |
| upload ??? | 01/01/70 00:00 | |
| here | 01/01/70 00:00 | |
| re:upload | 01/01/70 00:00 | |
| ok..here is the ckt | 01/01/70 00:00 | |
| values for the input resistors please | 01/01/70 00:00 | |
| oh sure..but hope nothing else burns... | 01/01/70 00:00 | |
| ESD problem | 01/01/70 00:00 | |
| It would be proper to start a new thread | 01/01/70 00:00 | |
indeed it would | 01/01/70 00:00 | |
| Static | 01/01/70 00:00 | |
| Unsuited and dangerous! | 01/01/70 00:00 |