...ich hab deine Daten per AVR mk2 geflasht aber es passierte nix. Egal, denn immerhin läuft es nun bei mir ja auch komplett und das war das höhere Ziel - Danke, KH! Klaus.
Hi everyone !, I have two nippon capacitors 10000 microfarad 63v, I measure with the conponent tester, the first is correct, the second measure: 33.01 millifarad (33000 microfarad), but its printed value is 10000 microfarad, ???????????? help!!!
MisterGNZ schrieb: > Hi everyone !, I have two nippon capacitors 10000 microfarad 63v, I > measure with the conponent tester, the first is correct, the second > measure: 33.01 millifarad (33000 microfarad) … The capacitor showing the larger value might be leaking, so the tester needs more charge pulses to reach the reference voltage level (see chapter 5.3.2 of the user manual). Are you shure to have connected the two capacitors using the same polarity (- on the lower number test pin)? Have they been discharged completely? Note that even after a short cicuit with a resistor such a large capacitor may restore a residual voltage between its terminals when the short is removed. This memory effect might influence your measurement. Greetings, derri
Hi Derry, thanks for the explanation. the capacitors are new with esr .01, maybe it is the component tester, which has reading problems on large capacities
MisterGNZ schrieb: > ... maybe it is the component tester, > which has reading problems on large capacities Did you build the tester yourself or did you buy it? Once i had the same error, and it was due to R11, I had made a mistake in the Assembly and had soldered a wrong Resistor. With me, also with larger Capacitor values too high values were indicated. In about every fifth Measurement a large Capacitor was correctly displayed. R11 must have a value of 10k (look at the Schematic). When i soldered the 10k resistor, everything was measured correctly. Would be worth a look.
I had the same problem on 3 builds 1 2200 uF read as about 6850 uF. After trying everything it seems to be the capacitor, I tried another capacitor and it reads correct, both were new and bought together. Best way is to try a lot of other capacitors and check if a few or a lot of capacitors read much higher. If you have access to a bought capacitor meter you could check the capacitor on that.
...habe mal versch gebrauchte Elkos von 3300 - 10000uF gemessen mit Pin 1 + 3 (also C-Mess-Mode!). Alle passen 1A. Tester ist der umgebaute LCR T4. EDIT: I measured several used elkos from 3300...10000 with dedicated (!) C-measure-mode on pin 1&3 and all are in spec...tester is the modded LCR T4 from above discussion. Klaus.
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I noticed that the 10000 microfarad condenser, if I shake it, moves inside, it seems that it hits the walls as if the liquid inside it has dried, the good one does not move. capacitor to throw away?
...you can check it with an voltage source, resistor and measure time until 66% of supplied voltage, its an e-fcn and then calculate C from known R, t & V. The basic way :) But if the other C is always good very likely the other C is bad - even if I do not really understand, why it displays a much HIGHER cap. Klaus.
maybe they sold me fake nippon capacitors
Hi Klaus R. I gave 13v voltage to the capacitor, I had to disconnect because it heated a lot, new never used, the tester component works very well
...take it appart to se whats inside :) So, yes, its very likely fake. Klaus.
Hi Klaus R. I opened it, look at pictures
MisterGNZ schrieb: > maybe they sold me fake nippon capacitors Hi, Searching the net I found < https://www.chemi-con.co.jp/products/relatedfiles/capacitor/catalog/KMHN-e.PDF > on the manufacturers site. There you find the exact dimensions of your caps. This could be a clue to determine a fake. As of your pictures, they seem to show the original type, but your specimens might well be a few years old. The remaining capacity is largely dependent on storage conditions and duration, but could never increase to the triple value of the original. So the device measured as 33.000 uF is (was) surely defective. The fact that the cap heated up with only 13 Volts across shows that there was something seriously wrong with it. In general, old chem-caps may need reforming after very long storage durations, but then you must use a series resistor of a few hundred Ohms to limit the leakage current, and the voltage should correspond to the maximum operating voltage of the device (63V in your case). After several hours, maybe even days, the leakage current should drop to normal values. If this is the case, you can still use the device. If it keeps on leaking strongly, it is definitely dead and you should dispose of it. I hope this helps, derri
Hi Klaus R. I threw it immediately, in order not to have unpleasant situations, I also have 4 RIFA18000 microfarad 35v capacitors, they too have wrong measurements, but they work, I also have 2 ROE 10000 microfarad 50v, the measurement is ok, all new never used. I think when a capacitor moves inside, it is to be thrown away, do you agree?
MisterGNZ schrieb: > I think when > a capacitor moves inside, it is to be thrown away, do you agree? Yes, I do!
How to modify the auto exit waiting time under the menu interface? Now it takes 1400 seconds. It's too long. I didn't find the relevant settings in the source code.
...not in makefile and not in config.h? Klaus.
Zhq S. schrieb: > 新制作了一只M644晶体管测试仪，大家来看看吧 > https://oshwhub.com/zhqsoft/M644-TransistorTester ... ein neuer, gut ausgestatteter Clone im Anmarsch? Gruß Horst