Is there currently any usb tester better than the power z km001?
focusing on the amperage and voltage data acquisition capabilities in the pc software.
Many computer and cell phone technicians use this usb tester to measure the consumption of a device that is being repaired, but the software is never well translated at least into English
and it would be good more precision and samples per second(max 1000 sps ).
This ultraportable device is not meant to take 1000 measurements per seconds. One is fair enough. I would recommend you a bench multimeter or digital oscilloscope. A thousand accurate measurements per second require high rank equipment.
Just purchased today the new model Baseus VCKX65C which is 65 W and same USB-A+USB-C. Let’s see when it arrives if the problem still persists.
I have the TC-66C which says “bootloader 1.06”. How can I upgrade firmware, in case there’s any update?
Ok tried to update to 1.15 and says 固件联网下载失败!
I think that says “Help! I’m being held prisoner in a USB Tester Facility!”
Now could update it successfully the TC66C to firmware 1.15. What happened had the Windows software installed to ‘C:\Program Files (x86)\RuiDengUSBMeter\RuiDengUSBMeter.exe’, which requires administrative permissions to run from there. After enabling the .exe to run as administrator now works perfect: 固件升级完成,等待设备有自
Can I use USB-A to USB-C adapter to use TC66C with USB-A chargers?
Mike
Yeah you can, but the output will be most likely fixed at 5V, and depending on the cable it may or may not transmit the power to the other end, some USB-C cable requires authentication before allowing power transfer.
Regarding the POWER-Z FL001 SUPER, is there any way to force the meter to start in English? As is, every time I plug it in I have to change the interface from Chinese to English, which is mildly annoying despite it not being that difficult.
Also, is there a firmware update that offers support for Apple’s charging protocols?
*For anyone searching for information on changing the language: double-click the large rocker-style switch, then double-click it again. English! (Unless you accidentally single clicked it the second time. In which case, enjoy your newly rotated display. In Mandarin.)
Have problems with the TC66C app, on Samsung with Android 12: says “Storage permissions are not open” and “Storage error” whenever I click on SHARE.
Anybody else having the same issue with Android 12, Samsung or not?
Is there any usb meter under 20€ which I should consider? I would like to measure both USB A and USB C powerbanks and chargers…
T66c seems to be little bit too expensive for my purpose… and also its usb C only?
For something compact and simple, you can use the UM24/UM25.
The UM34 is overall worse than the UM25 in terms of capabilities, but it has the advantage of support Dash Charge/VOOC protocols, which is nice.
UM34: https://www.aliexpress.com/item/32880908871.html
UM25: https://www.aliexpress.com/item/32855845265.html
If you want something that’s big and has more features:
https://www.aliexpress.com/item/1005001489704881.html
I’m not sure if I would buy this though, because it’s very big.
TheHWcave has some great in depth looks and testing of various USB meters. i learned a bunch about my UNI-T UT658 
USB testers play list
i don’t know why he has so few subscribers? i think he’s fantastic.
It’s niche content.
Do I understand right that if I am not interested in OPPO charging protocols then UM34 is better, yea?
Ah, sure
//one more question, should I buy it from your link to avoid counterfeits or is it safe to buy from random dealer with good reviews? 
@abxg1, I prefer buying from RD Tech directly.
They are the original manufacturer last time I checked, and have very good support.
It doesn’t matter too much in the end, so pick your choice
Sharing info on a new USB-C EPR PD3.1 QC5.0 (240W) tester… ChargerLab / Power-Z KM002C.
The KM002C appears to come in a lite and full version of the per listings on aliexpress.
Also an updated KM003C with slightly larger display may in the works.
Looks like it’s sold out on Amazon. Is possible to purchase this on AliExpress or are counterfeits?