ratio

ES1010 Wireless High-Voltage Ratio Tester
For current, ratio, phase identification, polarity, ratio error, and angularerror measurement on primary and secondary circuits of high and low voltagecurrent transformers and transformers below 60kV.
Primary range: 0.0mA～1200A
Secondary range: 0.0mA～20A
Ratio: up to 1:10,000,000
Wireless transmission distance: approx. 30 meters
Data storage: 500 groups
Includes 5 insulating rods, each 5 meters long

Simply put, the ratio refers to the ratio of the primary side (input) to the secondary side (output) in terms of voltage or current. ES 1010 tester mainly measures the current ratio.