Register 1,Highest technology and best quality,10:1 to 1000:1, 5+1 2,digits and 3.5v to 6.5v.70to 320ms,6Hz 3,Double shield. RegisterKey Technical IndexJD series Electronic Type Counter for Electric Energy Meter 1. Pulse ratio specification: 10: 1 20: 1 40: 1 80: 1 100: 1 200: 1 400: 1 800: 11000: 12. Start-up work voltage no greater than: 2.8v3, Normal working voltage: 3.5v to 6.5v4, Pulse width ...