| Products > Test Equipment |
| Multimeters With Low Ohms Function |
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| HKJ:
--- Quote from: ermionesrl on January 29, 2022, 03:37:57 pm ---It was interesting to know multimeter input capacitance to understand a supposed anomalous settling time in a measurement done by AVGresponding. Of course ideal would be to measure capacitance in ohm function, but I think it's very difficult to do it, so I did in DCV just to have at least an idea of the order of magnitude of the value. --- End quote --- Capacity in DCV basically has nothing to do with ohm ranges. I explain a bit about multimeters here: https://lygte-info.dk/info/DMMDesign%20UK.html and here: https://lygte-info.dk/info/DMMDesignProtection%20UK.html#Ohm/Continuity/Diode/Capacity The second link shows the typical input circuit for ohms (and other ranges), the first link shows the typical measurement circuit. |
| AVGresponding:
--- Quote from: HKJ on January 29, 2022, 03:47:06 pm --- --- Quote from: ermionesrl on January 29, 2022, 03:37:57 pm ---It was interesting to know multimeter input capacitance to understand a supposed anomalous settling time in a measurement done by AVGresponding. Of course ideal would be to measure capacitance in ohm function, but I think it's very difficult to do it, so I did in DCV just to have at least an idea of the order of magnitude of the value. --- End quote --- Capacity in DCV basically has nothing to do with ohm ranges. I explain a bit about multimeters here: https://lygte-info.dk/info/DMMDesign%20UK.html and here: https://lygte-info.dk/info/DMMDesignProtection%20UK.html#Ohm/Continuity/Diode/Capacity The second link shows the typical input circuit for ohms (and other ranges), the first link shows the typical measurement circuit. --- End quote --- Given the varied responses by different meters, I think it's fair to say that some at least may be atypical, in implementation if not broad theory of operation. |
| HKJ:
--- Quote from: AVGresponding on January 29, 2022, 05:28:37 pm ---Given the varied responses by different meters, I think it's fair to say that some at least may be atypical, in implementation if not broad theory of operation. --- End quote --- That is correct, but all DMM's has a high-z voltage input and at least one low-z path (current output) in ohms (Together with a very high z input path), i.e. very different. |
| jasonRF:
I recently picked up a Fluke 8012a off of ebay for this feature, but unfortunately it doesn't work as well as the listing indicated... Next time Dave collaborates with a company for a new DMM, he should include it. I would buy one! jason |
| J-R:
--- Quote from: jasonRF on July 18, 2023, 11:43:26 am ---I recently picked up a Fluke 8012a off of ebay for this feature, but unfortunately it doesn't work as well as the listing indicated... --- End quote --- Did you already try blasting the switches with contact cleaner and working them back and forth a bunch? |
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