Greetings...
Maaaany years ago there was a discussion somewhere, why a multimeter was unable to power itself from the voltage being measured. Or was it able to ?
Can anyone refresh the subject ?
Am after one of these to permanently display the DC generated by a solar panel array, up to 600VDC / 20A full scale. If turns off at night as there is no generation, fine. If turns on again at dawn, perfect.
Maaaany years ago there was a discussion somewhere, why a multimeter was unable to power itself from the voltage being measured. Or was it able to ?
Can anyone refresh the subject ?
Am after one of these to permanently display the DC generated by a solar panel array, up to 600VDC / 20A full scale. If turns off at night as there is no generation, fine. If turns on again at dawn, perfect.