Products > Test Equipment
East Tester ET4410 ESR Measure
Martin72:
--- Quote from: The Electrician on July 14, 2022, 11:57:35 pm ---The measurement is stable with electrolytics because they are lossy; their D is never going to be as low as .001, or even close to that.
--- End quote ---
Yap, see https://www.eevblog.com/forum/testgear/east-tester-et4410-esr-measure/msg4297858/#msg4297858
mawyatt:
Likely our ESR readings are also stable due to capacitor loss. These cheap film types we have are nowhere near the Q of the Silver Mica or Polystyrene types. Here's what the Tonghui TH2830 and Hioki IM3536 show at 10KHz for a 10nF cheap film type.
Best,
TimFox:
A comparison of results with my DE-5000 using a home-built four-terminal sense of two binding posts (0.75 in spacing).
DUT: SBE 715 (now CDE), 10 nF/5%/600 V film-foil polypropylene ("orange drop") radial leads.
Test mode: series capacitance Cs
Manufacturer's spec: Q > 3400 at 20 kHz, Q > 2500 at 100 kHz.
100 Hz: 9.932 nF Q = "OL" ESR cycles from 10 to 130 ohms
120 Hz: 9.929 nF Q = "OL" ESR cycles from 5 to 56 ohms
1 kHz: 9.927 nF Q = "OL" ESR cycles from 0.02 to 0.3 ohms
10 kHz: 9.925 nF Q = "OL" ESR stable at 0.01 ohms
100 kHz: 9.921 nF Q = 1911 ESR stable at 0.08 ohms
The "cycling" ESR behaves like a relaxation oscillation between the limits.
The last (finite) Q display settled to that value after maybe a dozen readings.
The stable ESR values settled after only a few readings.
Obviously, this high-Q part is at the limit of loss reading for this meter.
Phase angle is always 90.0 deg.
indman:
--- Quote from: The Electrician on July 14, 2022, 11:43:53 pm ---I measured the silver mica cap from reply #20 on my DE5000. Here's what I got.
At 1 kHz, the value of the cap is good. D is 0.000, Q is OL, ESR is 1.86
At 10 kHz, the value of the cap is correct. D is 0.000, Q is OL, ESR is 0.18 :-- |O
I found a 10 nF polystyrene capacitor and measured it with the Hioki IM3570:
--- End quote ---
Now I'm starting to understand why the DE-5000 can't correctly measure high quality film capacitors at different frequencies. Can you measure similar capacitors on your Hioki IM3570 and confirm my findings in this thread?
https://www.eevblog.com/forum/testgear/any-one-mod-the-de-5000-for-1mhz-frequency/msg2676075/#msg2676075
Martin72:
Come on, not again...
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