Test/review of ChargerLab PowerZ KM001C

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HKJ
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Test/review of ChargerLab PowerZ KM001C

ChargerLab PowerZ KM001C

DSC_5565

Official specifications:


  • Screen material: OLED/ pure white
  • Screen resolution: 128*64
  • Interface type: Type-C/USB-C
  • Number of interfaces: 3pcs (including one HID port)
  • Internal resistance of interface: About 28m ohm
  • Independent power supply: HID port (5V)
  • Working current: 4-25mA/5mA (standby)
  • Voltage precision: 0.10%
  • Current accuracy: 0.10%
  • Voltage resolution: 0.0001V
  • Current resolution: 0.0001A/1uA
  • Maximum voltage / rated range: 0-28V/0-24V
  • Maximum current / rated range: 0-8A/0-5A
  • Offline curve record: 2560×5 group or 12800×1 group
  • Number of capacity and energy statistics: 5
  • Acquisition speed: 110501001000 times (upper computer)
  • USB3.1 transmission: measured 670MB/s
  • PD video transmission: Hardware 2.0 above

I got the meter on ebay from dealer: maxmober

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I got the meter in a small metal can.

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Inside the envelope was the metal can with the meter and a micro USB cable for a computer connection.

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The connectors and buttons are marked on the bottom.

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This button is the select/menu button

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These two buttons are used to change main screen and change values. The micro USB connectors is connected to power/computer and can be used together with the control software and to install software updates.



Display and functions

The meter do not include a manual and is rather complicated to use due to the many functions. In this chapter I look at most functions in it.

At first the two buttons near the micro USB (top buttons) can be used to select between the 6 main screens:

  1. Voltage/Current/Power/Capacity
  2. Measure source resistance
  3. Graph Voltage/Current
  4. Detect protocol and D+/D- lines
  5. USB-C protocol monitoring
  6. Welcome and configuration

Inside each screen the button on the other side (bottom button) can be used to activate functions and then the two top buttons are used to change values, often the right button must be pressed to enter the actual screen.
The last main screen is remembered during power off.



Voltage/Current/Power/Capacity screen

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The Voltage/Current/Power/Capacity screen, to start recording hold down the bottom button.

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It records with a very fine resolution (0.1uAh and 1uWh).

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The memories, use top button to move between them, when the sub-menu is present the right top button will select that memory for further recording. This can also be seen on the first screen CH1 changes to CHn where n is the number selected.

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Save interval defines how long time it can record.

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Usual the bottom button must be held down to start/stop recording, but using these rules it is possible to automatic start recording when current is above a specific value and stop again when it drops below another value.

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End time is probably how long before a recording will be forced to stop and refresh rate is how fast the display is updated.



Measure source resistance

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This function is not really a cable measuring function, but a source measuring function. To use it a fixed load must be ready, but not connected.

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When asked connect the load.

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And it will measure the voltage drop and calculated the source resistance.
I was using my lab supply nearly directly connected and got a low resistance, most of it from the USB-C connectors.



Graph Voltage/Current

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This screen can show either voltage or current or both graphically, the scale will automatic adjust.

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Here I have added 0.54Vpp ripple to the power at 5Hz (This is rather slow), I used maximum sample speed. The meter shows it, but not very precise (It is a nice sine wave from my generator).

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The sample speed can be selected from 1-10-50-100 frames/seconds

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CH1 is voltage and CH2 is current, for fast update speed it is best to only show one of them.



Detect protocol and D+/D- lines

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This is for all the old USB protocols hiding in a USB-C connector.
The SDP is “Standard Downstream Port” that is rated for 0.5A current.

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Pressing the bottom button will show this menu.

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The AUTO function will scan for protocols and list them. It will not list QC2 when there is a QC3 because it is implied in QC3.

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The MANUAL function says sniffering, but I do not know what exactly it does. When finished it list a couple of protocols.

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On this charger selecting QC2 or QC3 makes it possible to adjust the voltage.

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But selecting one of the other protocols do not.



USB-C protocol monitoring

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This screen uses the USB-C communication lines to talk with the power supply, this only works if Power Delivery V2 (PD2) is supported.

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This is the normal view when connected between a device and power supply.

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Connecting this device first and selecting monitor makes it possible to monitor the communication. For this to work external power must be used on the Power-Z.

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The monitoring is not very useful.

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Selecting Sniffer is better, then it is possible to check the different voltages supported by the USB-C PD power supply.



Welcome screen

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The welcome screen

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The different configurations menus.



Measurements

  • USB-C output will only be enabled when selecting USB-C and Sniffer or another device on the output do it.
  • The usb meter uses about 19mA current with normal brightness (50)
  • The internal resistance is about 0.080ohm (This includes both connectors).
  • Usb meter will remember measured values when power is removed.
  • USB meter uses software V1.3.3
  • Fast charge protocols supported: QC2, QC3, Huwai-FCP, Huwai-SCP, Samsung-AFC, Samsung-AFC.
  • Brightness and screen saver can be adjusted.


Voltage

The voltage display is very precise with no current flowing.

Current

The current display is also very precise and will not change with voltage.

Temp6620

M1: 55.9°C, HS1: 63.7°C

Temp6621

M1: 56.4°C, HS1: 63.2°C

The above IR photo was taken after 30minutes with 5A, during that time the readouts changed less than 0.2%



PC application

1s

The PC application is mostly in Chinese, but not totally hopeless to use.

9s

In the “App setting” it is possible to configure colors and save location.

2s

The “Meter Setting” is very difficult to read, but if you check the screens on the meter it is not that difficult to guess.

3s

The “Meter calibration” is best to stay away from, it can easy change the calibration of the Power-Z meter.

4s

Firmware update is a easy way to update the firmware, just press the check button.

5s

And if a new version shows up press the upgrade button.

6s

The USB Power Delivery Protocol Analyzer is not easy to use.

11s

Here with some USB-C PD traffic.

7s

Lets get back to the main screen, here I varies the voltage up/down. The recording on this chart is started from this application and has nothing to do with recording on the Power-Z. It is possible to select up to 1000 samples/sec.
It is possible to add one more curve from: D+/D- (This is two lines), Power, Energy, Temperature. These values are recorded and can be added when viewing the curve, i.e. it is possible to view all of them (one at a time) for a record.

12s

Cursor shows actual values. The scale for Watt is added to the Volt scale, it is 1V=10W.
Color selection for Watt could be better with green numbers, orange curve and yellow scale.

8s

I selected “Wave type” “Dynamic” and that obvious means auto scale.

10s

There is also a panel to control various fast charge schemes.
The different curves recording during a session is not discarded before the session ends, the “Graph x” at the top will show them.

SavedCharts

Saved charts are in very high resolution.

savedlog

The data can also be saved in csv format, except for the first line it is a good US CSV format.



Tear down

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It was very easy to open, just four screws had to be removed.

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This side of the circuit board contains the display and part of the male USB-C connector.

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All the electronic is on this side. There is the current sense resistor (R010: 10mOhm) with a supporting current ADC (226: INA226: 16 bit I2C both voltage and current). The is a EEPROM (BL24C512: 64kbytes 1 million writes). The voltage regulator (SE8542: 4.2V regulator) has a bit strange voltage, this must have something with gating 5V from micro USB with the USB-C connectors, the diodes and transistor near the regulator is probably also for this. There is another voltage regulator (SG4HK: 3.3V) with the voltage for the chips.
The main processor (GD32F150G8: ARM Cortex-M3: 64kB flash, 8kB ram, 10ADC inputs, USB-2 full-speed).
The chip marked GSAA is some sort of USB-C protocol interface

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Conclusion

This is a very advanced usb meter, with good precision and lots of functions, but more English in the menu and PC program, together with a manual would be a big improvement.
Without this it is still usable, but it requires more to find out of it works (I hope my Display and function chapter can help with that).
This meter has good support for the different USB-C tricks with both PD and the older protocols, but there is some rough edges in the software, I had a lot of software crashes on it when playing with protocols.

At the current time it is one of the best meters for USB-C.



Notes

For these USB meters I used precise equipment (Keithley: DMM7510, 2280S, Keysight: 34470A).

How do I make the test

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

angerdan
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Thanks for your review Smile

s5610
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HKJ wrote:
current sense resistor (R010: 10mOhm)

Current can flow in any direction? I see arrows near ports…

PS Great job, as always!

HKJ
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s5610 wrote:
HKJ wrote:
current sense resistor (R010: 10mOhm)
Current can flow in any direction? I see arrows near ports…

I did not really test this, but I assume it will work in both directions.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

s5610
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HKJ wrote:
I did not really test this, but I assume it will work in both directions.

Dear HKJ, do you know cheaper alternative, but omnidirectional too? 50+ are bit too much )
HKJ
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s5610 wrote:
HKJ wrote:
I did not really test this, but I assume it will work in both directions.
Dear HKJ, do you know cheaper alternative, but omnidirectional too? 50+ are bit too much )

The only other USB-C plugin I have tested are:

https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1278%20UK.html
https://lygte-info.dk/review/USBmeter%20RD%20Tech%20USB%20Meter%20TC64%2...

Only the first one is bidirectional.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

dodge_911
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s5610 wrote:
HKJ wrote:
I did not really test this, but I assume it will work in both directions.
Dear HKJ, do you know cheaper alternative, but omnidirectional too? 50+ are bit too much )

RuiDeng TC66 can do that and is about 20$ afaik... And it should be out right about now, check their AE store...

This one (KM001C) can measure in both directions if I recall correctly, I've got a video on it planned. They sent me one for free after seeing me bitch about the manual and software in a video on the predecessor tongue-out

Regarding a decent manual : my source at Chargerlab told me they're workin' on that.

:: youtube ::
http://bit.ly/dodgereviewsyt
    :: powerbank capacity tests ::
http://bit.ly/drpbcc
:: μusb cable tests ::
http://bit.ly/drmicrousb
:: lightning cable tests ::
http://bit.ly/drlightning
 :: type-C cable tests ::
http://bit.ly/drtypec

 

s5610
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dodge_911 wrote:
RuiDeng TC66 can do that and is about 20$ afaik… And it should be out right about now, check their AE store…
Thanks for prompt. Found it here. Seems legit TC66, just an early bird from factory back door? I’m sorry of talking off topic, but sometimes lower priced product wins. Chargerlab has higher class, but RD is strong at value/price ratio. I bought hell of different meters in the past, now want buy one extra that I really will make use of, not too complicated with fancy features.
BlueSwordM
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My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

s5610
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BlueSwordM wrote:
You mean this:
https://www.aliexpress.com/item/RD-TC66-TC66C-Type-C-PD-trigger-USB-Volt...
Yes, the place where it should be, but not selling yet. Price tag is telling…

Oh, I found the word for Chargelab tester: overengineering Smile