| ??? 09/10/07 06:42 Read: times |
#144217 - High Voltage measurement |
I want to measure a voltage ranging from 500V to 6 KV. I am using resistor divider to get the voltages from 0.5V to 6 V. This voltage is to be given to DPM for display. But the reading is not coming properly. A little deviation is coming (obviously). So I am trying the following: I have taken N number of readings manually. I made a table, actual output vs idle output. I am using uc with in built ADC & DAC. First I am converting it to Digital and then by using lookup table, I am converting it to analog by DAC. The problem for me is: My uC ADC can handle upto 2.5 V only. How to handle 6V? Seeking advice from experts....Please.... Is this method is OK? or any other method can be adopted.... JPRAO |
| 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 |