VM203 calibration

Just bought a VM205, but are unable to calibrate the unit
VM203 reads the USB 5V as 4,2V making calibration fail.
Gets the "VPP
Measuring the USB voltage directly (with the unit connected) reads 4.9V
Trouble shooting sequence is OK, all passed
Any suggestions would be welcome, please

You may try following:
When entering the actual voltage measured, please use your local decimal separator (comma) instead of dot.

Hej VEL255

Sorry for the late reply, was occupied elsewhere

Thank you very much for the tip, it solved the problem
The simplest solution is often the best :wink: