Lightning impact peak Ammeter

Used for measuring any once –impulse full waves whose first signal form’s length overpass 500ns ,also measuring and storing the numerical value of the impulse peak-voltage , peak-current and other once-impulse peaks. A circuit that protects a computer system from dangerously high voltage surges. The whole design is adopted with industry standards?
Input voltage: :=±1600V
Input resistance :2MO//39PF
Measuring accuracy :1%
Time for rise:about 85ns
Work environment: 0~70?,0~95%
Voltage ratio setting:0.1~9999.9
Range of display:0~16000KV
Connection: parallel input with two outlets
Lightning impact peak Ammeter