| Products > Test Equipment |
| Accuracy of LCR meter? |
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| rs20:
OK, I stand corrected, thanks for taking the time to provide evidence. I'm appalled that they think it's OK to present their performance specs like that, but I guess I'm just naive. |
| bd139:
Worth pointing out that specifications are always conservative here or open to interpretation because fixture and lead capacitance and inductance is a function of the measurement methodology employed by the user. They may make up a significant portion of the measurement. This is unlike resistance which is only an issue on very low resistance measurements. Ergo it’s better not to worry about a couple of percent and a few counts and work out what the tolerance and device spread of your design is and make sure you window values within that. |
| AVGresponding:
Also worth pointing out the laughably wide manufacturing tolerances on some components, notably electrolytic caps which can be as wide as +20/-80% Edit: Might have been -20/+80% that I saw once. Either way, measuring the capacitance there would have limited use, ESR would be the better measurement. |
| bd139:
Usually -20% +80%. Unless it's ChongX and then you might as well ignore the label and look at the size of the can and make a finger in the air estimate. |
| mqsaharan:
--- Quote from: BravoV on June 30, 2022, 11:42:26 am ---Accuracy for LCR meters that use Cyrustek ES51919 and ES51920 based chip sets are pretty good. Example : DE-5000, MS-5308 or UNI-UT612 and etc. For calibration there was an info shared by other fellow here in this forum -> --- Quote from: mwb928 on May 15, 2018, 10:20:56 am ---For those who would like to perform unit calibration, here is the information and it is also works on Mastech MS5308, UNI-UT612 or whatever using Cyrustek ES51919 and ES51920 ship set. For DE-5000, adjust DC 500mV between TP1 and TP2. For others, adjust DC 500mV between pin 26 and pin 28 on ES52920. --- End quote --- --- End quote --- Be careful while calibrating these LCR meters. You need a meter with Hi-Z input impedance. Even a 10M input impedance meter loads down the reference voltages. |
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