| ??? 01/16/05 02:36 Modified: 01/16/05 02:40 Read: times |
#85031 - Re Responding to: ???'s previous message |
Raghunathan said:
1. In a mains operated unit, whether the output is referenced to mains ground or floating ( would a simple ohmic value check between the -ve terminal of the output and the PE pin suffice ? ) Yes. Sometimes even the measuring of capacitance between the both lines can be interesting. Of course, you should only make such a measurement, if you are totally clear, that any of these potentials is allowed to be directly touched (use of Saftey Class I and II)! 2. Source impedance. This is the real problem- you have no idea unless the manufacturer specifies - is there any way to find this out ? Connect first a load of >1MOhm, then 2kOhm (or even less) and observe how the signal goes down. From this signal damping the unknown source impedance can easily be calculated. Kai |
| Topic | Author | Date |
| Source Impedance | 01/01/70 00:00 | |
| Re | 01/01/70 00:00 | |
| Impedance measurement | 01/01/70 00:00 | |
| Being more concrete | 01/01/70 00:00 | |
| What about my Rogowski Coils. | 01/01/70 00:00 | |
| Already answered in detail! | 01/01/70 00:00 | |
| Re: ' Detailed Answer' | 01/01/70 00:00 | |
| Bridge | 01/01/70 00:00 | |
| What Bridge, | 01/01/70 00:00 | |
| bridge | 01/01/70 00:00 | |
| and ... | 01/01/70 00:00 | |
| Using an OPamp | 01/01/70 00:00 | |
| Using OpAmp | 01/01/70 00:00 | |
| Some disadvantages | 01/01/70 00:00 | |
| Correct formula | 01/01/70 00:00 | |
| Thanks Kai, | 01/01/70 00:00 | |
| LCR meters quite common | 01/01/70 00:00 | |
Re: LCR Meter. | 01/01/70 00:00 | |
| Resonant coupling... | 01/01/70 00:00 | |
| Sorry! | 01/01/70 00:00 | |
| Go with the rule of Thumb | 01/01/70 00:00 | |
| No more than about 10kOhm | 01/01/70 00:00 | |
| Line drops | 01/01/70 00:00 | |
| Thicker cable | 01/01/70 00:00 | |
| Freq domain analysis | 01/01/70 00:00 | |
| re: Source Impedance and driver types | 01/01/70 00:00 | |
| universal solution | 01/01/70 00:00 | |
| Thanks .... | 01/01/70 00:00 |