USB power meter/tester thread - YZXStudio, Power-Z, RDTech and more.

Are also the owner of this meter and the lcdscreen looks fascinating with 0.1 values
wicked the amount of sellers listing this as usb3.0 and precirurius how an typo (that seems to originate from its version3.0 get evolved to USB3.0 and then just gets a life of it self, and is more the case then none ’ the amount of sellers listing it as usb3.0, ewen thow its clearly not one of ZXYstudios USB3.0 meters.

the Bluetooth-datalogging in raw format of the 2 values, are there aint any apps that on the fly put them into an graph or manage them in a more pleasing way for the beholder…
I tryed the OWON app for there BT DMM and ewen thow there older BT2.0 APP reconize the SPP_CA (in regards to aint, on the owon bt4.0 app) it clearly wouldnt manage the values.

anybody on top’ of this ballpark and how this raw bluetooth-data is being managed and if there is any app-support to ex. win10/7, mac, android, windows phone that will play along with these raw stream of bluettoth-delivered-values and graph these string / hex values out on the fly, like you see on DMM datalogging software??. (certainly aint my field)

Thanks for that! It’s usable for any of the YZXStudio meters that have bluetooth too :slight_smile:
Now I need to buff up some on my excel (numbers) and math skills to figure out the formulas you used :smiley:

It’s pretty easy… for Capacity (Ah):
First value: C = Current / records per hour
Then:
C1 = C + (Current / records per hour)
C2 = C1 + (Current / records per hour)
And so on… just drag down to replicate the formula for all fields

Records per hour = 3,600/serial upload date

For Energy is the same, instead of current use power.

Once you have the chart done just simply import new data for whatever you’re going to test. There is a very small variation in this calculated value vs the measured value displayed in the meter, but even at 10s refresh rate the variation was only at <1%. At 0.36s refresh rate the tolerance should be near zero, but that’s a lot of values to work with.

Hi,

I've just bought the YZXstudio 1270 and I have a couple of questions.

I've bought the BT module separatly, but where can I find the small transistor and pins to be added it on the board?

I have 2 models, one is USB 2.0 and the other one USB 3.0. Is it possible to upgrade 2.0 to 3.0? If yes, how?

Thanks

I’ve been messing around somewhat, thus far, I produced these :



I notice very strange things going on when playing around with QC charging…

Just got my YZXStudio 8th gen power bank. Seems quite good, when I tested it with a single Sanyo NCR18650GA.

Compared to a Miller ML102 (v9) it manages to squeeze out 11 % more energy (10.2 vs. 9.2 Wh) before shutting down. All while supplying a rock solid 5,13 volts from the usb output. I stopped measuring the ML102 after the output had dropped to 4.5 volts. Usually I consider 4,75 volts as the lower limit as per usb charging specs.

I just wired it temporarily to a 18650 holder before having 4 18650GAs spot welded to form a 4P pack.

!

It has been a year since I bought I bought my then ‘new’ YZXstudio usb monitor from Frankie Tong, and since then I have not kept up with the newer products.

This new powerbank has caught my interest.

I hope to read more about YZXStudio 8th gen power bank here or even have its own thread.

While searching online about YZXStudio devices, I notice there’s another model not yet referenced here: ZY1276, anyone who has this and have some first looks/reviews?

There’s also the ZL1100 load tester/protocol detector (it doesn’t have meter function? unlike the ZKE EBD-USB+ which is both a load tester and meter, but needs a PC and the software to view/control) from YZXStudio. There are a few reviews/images of the ZL1100 in the Chinese forum http://chongdiantou.com. But otherwise, similarly hard to find further info about it.

Found them in YZXStudio Taobao Store (in Chinese though, may need to use a translator…)

ZY1276:
USB快充協議測試儀電壓電流表容量QC4+PD3.1POWERZ檢測YZXSTUDIO - Taobao (select the image to the right that shows ZY1276)

ZL1100:

I have the new ZL1100 which is basically a more functional and accurate version of the ZL1000, I’m still trying to figure out some functions but so far it seems to be an excellent discharger. And because it draws external power it can also be used to discharge test batteries.

Took a while to program data logging via serial port but I finally managed to do it, however I wish there was an option to set reading intervals.

Let me know if you need to know anything else about the ZL1100

Fancy meetin' you here, d_t_a :D

I did a little video about the ZL1100 a while ago, use it quite a lot in cabletests on my channel.

Same offer as above, ask away :)

I'm pondering the ZY1276, but it doesn't really do anything that I can't already do with my collection of YZXStudio stuff...

Hi there dodge, Have you managed to set up the USB serial data logging? Do you know how to lower the data refresh rate like in the YZ1270 when logging via bluetooth serial?

Now I’m data logging at full speed at about 11 readings per second which is an insane amount if I were to do a 12-hour discharge test :smiley:

Nope, I'm afraid I don't use that particular feature of it.

I've got 4 EBD-USB' for that and I was getting tired of messing around with Excel for my graphs.

I need them timelapsed nowadays, for the videos, so that's why I use the EBD-USB's instead.

But I believe our buddy maukka knows a bit more about the USB serial data logging.

Hey! If you're gonna spam, at least spam some nice coupons along, dammit!

Thanks for the coupon :) If I hadn't said anything, we wouldn't have gotten that coupon :D

Dodge_911, nice to meet you here. Didn’t know you’re here. Am new here. =)

Anyway, just noticed your signature has links to data with cable resistances. I’d like to know the procedure you use to measure them (probably have to move to another message thread — I actually started a message / question about that in another thread here a few days ago).

I have some of the cables you mentioned — like the short flat micro-usb cable that came with the Mi 20000mAh powerbank and also the TronSmart 1.8m micro-usb cable; can probably make some comparisons by following your procedure (I only have a very few basic equipment though, so might not be able to actually replicate what you did).

Kaayee, I’m wondering if the other models, eg. the newer ZY1276, also support the Bluetooth module? If so, how is the module ‘installed’ to the ZY1276? (Unfortunately, I’m from a different part of the world than most people here, I guess… So Amazon isn’t exactly available to me, or if Amazon does ship to my location, the shipping cost will likely be more than the cost of the item itself. But the YZXStudio items has gotten my interest, but haven’t actually bought any yet…)

I will suggest you check my 1270 review:

1270 with Bluetooth: Test of USB YZXStudio ZY1270

There you can see how the Bluetooth module is installed and I will be surprised it the 1276 is missing that interface.

Hello HKJ, it seems there’s a new USB Type-C voltmeter from YZXstudio:
www.ebay.de/itm/YZXstudio-ZY12PD-USB-PD-PD2-0-ecoy-type-c-poller-fast-charge-trigger-detector-/122604161897

It do not look like voltmeter is the main function, but before I can play/test that I need a real USB-C power supply.

Who knows the best shop to buy from europe?
amazon.com does not ship KAAYEE items to Germany.

I'm also still kind of new here :) But, check out the first lightning cable test videos on my YouTube channel, that shows you one way you can measure voltage drop and calculate the resistance without YZXStudio meters.

Check the thread you started for more info.

There's probably more and better ways, but I don't know those :)