How to change the magnification of a three-phase mutual inductance meter after setting it incorrectly?

This problem is often encountered in practical operation. Sometimes the magnification is set incorrectly when the household is established, and sometimes the transformer needs to be changed from small to large or from large to small, requiring a change in magnification.

Before changing the multiplier of the transformer, the user's electricity meter should first be withdrawn to remove the remaining power of the meter, and then a new account should be established using the user's original user number and meter number (of course, before establishing the account, the "meter information entry" operation should be performed to change the meter's "scrapped" status to "waiting for installation" status). When setting up an account, write it at its current magnification, and then change the magnification after issuing cards and selling electricity.