Standard who was seized with current transformer current transformer in series

Head measurement methods are: the use of check station conditioning equipment, in the actual working condition test transformer measured error value. Who will be marked when measuring current  electri cenergy meter  current transformer connected in series was seized calibration sets current output circuit, was seized with standard voltage  electric meter and voltage transformer is connected to the calibration sets the voltage output circuit. Measuring current transformer error, the output voltage of the calibration units transferred rating, and keep the current value of each current transformer to change the same.