I have 2 fencers and a voltage / amp tester. One of my fencers will read 3500 volts close to the farmyard but out another half mile it will read 6000 volts. Also close to the farmyard it will show 15 amps of short but as I check there are no big shorts. 1 amp down that strip or 2 amps down another strip until close to the end it will show no amps of short. What's the deal here? Thanks.