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snow I received as described and work well

2021-04-21 04:01:43 Helpful (0)
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Ralf Calibration method: In the off state, holdind the left button and power supply, when the display starts to flash, release the left button, measure the output voltage with multimeter, by pressing the left and right buttons, set the multimeter measurement voltage close to 5V, such as 5.00V 4.98V or 5.02V is also ok, in this situation please ignore the display on this object. After setting, please turn it off and then on again, then calibration is complete. Errors can be calibrated in 0.04 V. If the error is bigger, you can try to calibrate it again.

2020-09-16 02:31:46 Helpful (1)
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