It would be better to omit the words “when I am,” which are not in the original. The sign was to be Elisha’s seeing the actual translation, which he did 2 Kings 2:12.
Related Commentaries of 2 Kings 2:10
2 Kings 2:10
10 And he said, Thou hast asked a hard thing: nevertheless, if thou see me when I am taken from thee, it shall be so unto thee; but if not, it shall not be so.