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| LCR meter opinion |
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| Martin72:
--- Quote ---but it has problems at 100kHz that the MS5308 doesn't have. --- End quote --- Which problems? |
| coromonadalix:
the mastech and de-5000 are based on the same ic's ?? |
| indman:
--- Quote from: coromonadalix on November 15, 2021, 11:20:06 am ---the mastech and de-5000 are based on the same ic's ?? --- End quote --- Yes, but nevertheless there is a difference in work and not in favor of DE-5000 ;) https://www.eevblog.com/forum/testgear/any-one-mod-the-de-5000-for-1mhz-frequency/msg2626974/#msg2626974 |
| Martin72:
Testing 2µF with 100khz and wondering why it won´t work proper. |
| coromonadalix:
you dont test a 2uf at 100 khz you test it at 50-60 100 and 120 hz snipet taken from a web page Virtually all electrolytic capacitors will cease being capacitive at all before 100kHz, and beyond that, will be inductive. This is universal to all electrolytic capacitors. Generally, an electrolytic capacitor will gain about 10% capacitance if the DC capacitance is measured. It will lose about 10% by 1kHz (or more in the case of your capacitors - but they say they are designed for DC and ripple applications, so they are probably not optimized for anything above 120Hz). And this link https://forum.digikey.com/t/measuring-a-capacitor/4265 and this one, a 4.5 meg pdf https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwi39bT_1pv0AhUNzYUKHd6UCnEQFnoECBIQAw&url=https%3A%2F%2Fwww.venkel.com%2Fmedia%2Fwysiwyg%2Ftechnical%2Fdocs%2Ftechnical-papers%2FTesting_and_Measurement_Practices_of_High_Capacitance_Capacitors.pdf&usg=AOvVaw3NmsPp_o7DinutdRxvwplk |
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