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41% OFF Excellway® 20A DC Multifunções Medidor de energia digital Monitor de energia Módulo de voltímetro Amperímetro 11,98€ 20,29€ View It

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Aurum 08/11/2017

It happens that this power meter may give incorrect readings (more than should be). It can be calibrated by opening up the back and shorting the pads marked "W" on the PCB, then add 20V to the input and 1A load (20 Ohms) to the output. Then power on, wait for the display say "Pass" then power off and remove the short. Ta-daa: calibrated.

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rdlockrey what load are you reading? mine matched a fluke meter within 1-2 watts @f12v with a 100w rms (50x2) mini amp, it seemed correct too with LED's a 5M roll of 5050 (on white) it read just over 8A I wonder if some are leaving the factory without being calibrated
Resposta 08/12/2017

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