| ??? 09/19/07 16:16 Read: times |
#144789 - many DPMs use ICL7106 Responding to: ???'s previous message |
As has been mentioned already, many DPMs are set for either 2 volt or 200 mV input. I suspect there's an interaction between the resistor divider (attenuator) being used to reach the DPM's range and the one used to set that range DPM's, particularly since the output impedance of the attenuator is so high. Perhaps he needs a buffer stage between input attenuator and DPM.
Now all we have to do is persuade the Jprao to tell us what he's learned. RE |
| Topic | Author | Date |
| High Voltage measurement | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| Proper reading? | 01/01/70 00:00 | |
| non linear | 01/01/70 00:00 | |
| Resistor divider rating | 01/01/70 00:00 | |
| NON-linear ??? | 01/01/70 00:00 | |
| what is 'across' the 1M | 01/01/70 00:00 | |
| Does it matter | 01/01/70 00:00 | |
| e.g. A \'protection diode\' may leak a bit | 01/01/70 00:00 | |
| Parasitic ? | 01/01/70 00:00 | |
| DPM are normally very highohmic ... | 01/01/70 00:00 | |
| the problems | 01/01/70 00:00 | |
| A good idea, indeed! | 01/01/70 00:00 | |
| DPM input | 01/01/70 00:00 | |
| Thanks to all | 01/01/70 00:00 | |
| That's all very well | 01/01/70 00:00 | |
| Yes, Jprao, please answer our questions! | 01/01/70 00:00 | |
| DIffierent Divider Perhaps | 01/01/70 00:00 | |
| DPM? | 01/01/70 00:00 | |
| DPM is a widely used term... | 01/01/70 00:00 | |
| many DPMs use ICL7106 | 01/01/70 00:00 | |
Yes, evolves into a heart-stopping thread... | 01/01/70 00:00 |