Thanks a lot for talking with them. I have this tester and don't really trust the ESR test on capacitors due to the same observation. Say hello to cat from me.
Thanks for keeping this information flowing clearly. Extremely valuable for consumers and the manufacturers. Hopefully firmware can fix these problems. Otherwise it’s a door stop.
Gorgeous case. Tries to do a lot of things and in the process doesn't do well at any of them. Hey Scott, thanks for the in depth demonstration of these types of devices. A little tip for calibrating with hooks, get a smooth gold plated pin, put all three hooks on the pin, press test, and when you need to isolate the probes pull out the pin - releases all three simultaneously without damage.
I own the same fnirsi and DER devices. I came to the same conclusions. The fnirsi is ok for quick testing of small transistors, diodes etc, but I would not trust it to accurately measure caps. It is ok for the money, it can do quite a lot of things, but it does none of them really well. It is battery fed so it has a floating ground, which can be practical sometimes. Thanks!
Although it is advertised as being able to do an ESR measurement, if you don't worry about doing an apples to apples comparison, and instead, pay attention to the Vloss value it generates from a test, it can still be a useful quick check tool to verify the status of an e-cap. I have gotten the feel for an older TC-1 tester to notice that, a higher Vloss value equates to a capacitor being faulty. The downside is the cap has to be taken out of circuit, as it does not test with the 100KHz frequency that allows for in-circuit ESR testing.
ESR is not frequency dependent. But measuring ESR is frequency dependent. DSO-TC3 testing at unknown frequency. Other two testing at 100Hz. DE5000 have option to change testing frequency. And, these testing just show the measured impedance or doing some maths?
In fact, that tester measures those values utilizing different method. It's much slower than 100Hz used on both RLC meters, it applies DC because it just charges that capacitor to some point, then discharges it using different current and all that values it displays are taken from charge and discharge time, it's completely different to applying a 100Hz signal through the bridge, so it displays different values, esp. when DUT is no longer a properly working capacitor, which is pretty normal, but…well…complex things are complex…especially when it comes to impedance.
@@NikiBretschneider yeah this is true. I've just checked the test signal applied by my T7-H component tester (I'm assuming it's pretty much the same as the one shown in the video) with an oscilloscope, and there's no AC signal. it uses a series of DC voltages of opposing polarity, some RC curves can be seen, etc, but no true AC measurement.
Hi brother I am your regular subscriber ❤❤😊 I watch your almost all videos.But I have magic keyboard copy that is not working what can I do please reply 😢😢😢
I am talking with FNIRSI at the moment and have shared this video with them, hopefully they can fix this in firmware and issue an update.
Thanks a lot for talking with them. I have this tester and don't really trust the ESR test on capacitors due to the same observation. Say hello to cat from me.
Thanks for keeping this information flowing clearly. Extremely valuable for consumers and the manufacturers. Hopefully firmware can fix these problems. Otherwise it’s a door stop.
Gorgeous case. Tries to do a lot of things and in the process doesn't do well at any of them. Hey Scott, thanks for the in depth demonstration of these types of devices. A little tip for calibrating with hooks, get a smooth gold plated pin, put all three hooks on the pin, press test, and when you need to isolate the probes pull out the pin - releases all three simultaneously without damage.
I own the same fnirsi and DER devices. I came to the same conclusions. The fnirsi is ok for quick testing of small transistors, diodes etc, but I would not trust it to accurately measure caps. It is ok for the money, it can do quite a lot of things, but it does none of them really well. It is battery fed so it has a floating ground, which can be practical sometimes. Thanks!
Thanks for double checking that! Good to hear it’s another useless tool which will go on a shelf. 🖖
And so goes the cycle of gadget reviews. Thanks for your honesty too 😅
Although it is advertised as being able to do an ESR measurement, if you don't worry about doing an apples to apples comparison, and instead, pay attention to the Vloss value it generates from a test, it can still be a useful quick check tool to verify the status of an e-cap. I have gotten the feel for an older TC-1 tester to notice that, a higher Vloss value equates to a capacitor being faulty. The downside is the cap has to be taken out of circuit, as it does not test with the 100KHz frequency that allows for in-circuit ESR testing.
ESR is not frequency dependent.
But measuring ESR is frequency dependent.
DSO-TC3 testing at unknown frequency.
Other two testing at 100Hz.
DE5000 have option to change testing frequency.
And, these testing just show the measured impedance or doing some maths?
time to dive into the firmware to find the issue.
Or take it apart and see if the esr is a function the hardware can do.
Bah, i ordered one of these just last week. Hopefully they can fix it in firmware.
It only seems to be the ESR giving trouble, the capacitance value seems to be working ok.
To compare apples with apples, shouldn't the frequency, voltage from both devices match?
In fact, that tester measures those values utilizing different method. It's much slower than 100Hz used on both RLC meters, it applies DC because it just charges that capacitor to some point, then discharges it using different current and all that values it displays are taken from charge and discharge time, it's completely different to applying a 100Hz signal through the bridge, so it displays different values, esp. when DUT is no longer a properly working capacitor, which is pretty normal, but…well…complex things are complex…especially when it comes to impedance.
@@NikiBretschneider yeah this is true. I've just checked the test signal applied by my T7-H component tester (I'm assuming it's pretty much the same as the one shown in the video) with an oscilloscope, and there's no AC signal. it uses a series of DC voltages of opposing polarity, some RC curves can be seen, etc, but no true AC measurement.
What is the frequency used in the fnirsi test? Is it the same as the others?
It's a software problem, because older DIY tester with 9V battery measuring right ESR values...
Hi brother I am your regular subscriber ❤❤😊 I watch your almost all videos.But I have magic keyboard copy that is not working what can I do please reply 😢😢😢
This was my most disappointing purchase. It is crap and can't be trusted.
SLOW DOWN, take a deep breath, speak a little slower please ❤ God bless you ☦️
You need to calibrate it first then use it.
@@ThermalWorld_ I did, I just didn’t show it in this video, all items were calibrated first.
@@TheDefpom that means even a $13 component test do better than that one at this point lol 😄
It's 💩!