USB meter: KCX-017

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Official specifications: I found this unit on Ebay at a dealer called missjun2010



How does it look

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The button is used to select memory with:
One long click: Select next memory and clear it.
Double click: Enter view mode.
Click in view mode: Show next memory.

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The device has the usual usb connector for input, but also a micro usb connector that can be used directly with any standard usb charger.

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I could just pry it open.

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On the topside there is only the LCD display with a background light and a switch.

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On the bottom there is a PIC microcontroller, a HOLTEK LCD controller, a opamp and two 50mOhm resistors in parallel, i.e. 25mOhm resistance.
This is a very nice low resistance, but is partially spoiled by the cable.

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Measurements

Test

Temp1355

M1: 32,9°C, M2: 38,1°C, M3: 39,7°C, HS1: 49,0°C

There is nothing in the device that gets hot.

Temp1356

M1: 34,4°C, M2: 35,1°C, HS1: 42,1°C



Conclusion

I am not very impressed with the memory feature, but it can be ignored. The current display is fairly accurate and it has an acceptable resistance.
I will call it a good usb meter.



Notes

How do I make the test