Raytop Chemical news:Roma launched a new multi band wireless communication LSI optimized for smart meters
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Technical requirements of high performance IC card prepayment watt hour meter DDSY5558
First, the actual line voltage and current are sampled, and the power signal is generated by the UI multiplier; second, the U/f (voltage/frequency) converter is used to convert the power signal into a pulse signal with a certain frequency, and the pulse signal is converted by the counter Accumulated electricity consumption
Before measuring, first check whether the dial hand stops at the "0" position on the left end. If it does not stop at the "0" position, use a small screwdriver to gently turn the middle positioning screw under the dial to make the pointer point to zero, usually called mechanical zero adjustment . Then insert the red and black test leads into the positive (+) and negative (-) test pen jacks, respectively.