Products > Test Equipment
East Tester ET4410 ESR Measure
TimFox:
On that data sheet, there is a specified tolerance for the capacitance value (+/- 20% when measured at 120 Hz), but no tolerance on the tan delta (D) value.
They do not control the actual value of D, which is not practicable, but they test for maximum D.
This is normal for a capacitor data sheet.
TimFox:
If you are trying to test your meter, you might do the following:
The largest polypropylene capacitor in my hobby inventory is 20 uF.
Larger ones are available. 100 uF/400 V from Wima costs about $22.00 in singles, and is specified at only 10 kHz (due to its use in switching devices).
The 20 uF capacitor, measured at 120 Hz on my trusty DE-5000 reads "OL" on Q.
Assuming Q > 1000, the ESR < 0.066 ohms.
To increase the ESR to 1.59 ohms (as per your example) requires an external series resistor of about 1.5 ohms.
Connect such a network to your meter and check the readings at 120 Hz.
Martin72:
Hi Tim,
Good advice, got several caps here at home with several materials build up, let´s see.
--- Quote ---If you are trying to test your meter
--- End quote ---
Exactly this is the point.
When you don´t know the manufacturer, there´s no sheet avaible, you must trust your meter.
What the main parameters concerns I have no doubt about it.
In case of the DE5000 you shouldn´t have no doubt about it too, I´ve tested it so much in comparison to official calibrated ones, when you "only" want to know the LCR values, its more than enough with the DE5000.
But sometimes I need to know at least one of the "secondary" parameters and it would be good when you can trust your meter.
The Electrician:
--- Quote from: indman on July 28, 2022, 07:00:35 am ---
--- Quote from: The Electrician on July 26, 2022, 10:37:16 pm ---Here is an example of how extremely low loss capacitors can overwhelm even the best LCR meters. On eBay are offers for very high performance capacitors from Ukraine left over from the USSR military. I bought some of them and this is a .5 uF polystyrene capacitor.
--- End quote ---
Name the marking of this capacitor or show a photo of it, if possible. I'll look for the same one in my stocks.. :)
--- End quote ---
They look this: https://www.ebay.com/itm/193196126203?hash=item2cfb62effb:g:FLgAAOSwZL5dwu1n
but mine are .5 uF
I also have some like this: https://www.ebay.com/itm/203495673318?hash=item2f61498de6:g:MFoAAOSwXtFiNb1g
Notice that both of these sellers are in Ukraine.
The Electrician:
--- Quote from: Martin72 on July 29, 2022, 11:30:40 pm ---Hi Tim,
Good advice, got several caps here at home with several materials build up, let´s see.
--- Quote ---If you are trying to test your meter
--- End quote ---
Exactly this is the point.
When you don´t know the manufacturer, there´s no sheet avaible, you must trust your meter.
What the main parameters concerns I have no doubt about it.
In case of the DE5000 you shouldn´t have no doubt about it too, I´ve tested it so much in comparison to official calibrated ones, when you "only" want to know the LCR values, its more than enough with the DE5000.
But sometimes I need to know at least one of the "secondary" parameters and it would be good when you can trust your meter.
--- End quote ---
For some reason the data sheet you found for the Panasonic cap has deviated from the industry standard. Data sheets for small electrolytics nearly always specify that the given value of D is "max".
Have a look at any of these data sheets: https://www.rubycon.co.jp/en/products/al-radial-lead/series/
You should be able to trust your meter for electrolytics because their D won't ever get close to .001. The one thing that leads to the DE5000's inability to get a good measurement at frequencies above 100/120 Hz is that the electrolytic is large value. For example, when I try to measure a 33000 uF cap, I get OL on every frequency except 100/120 Hz.
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