You can change the measured variable of the new loop number or keep it the same as the source one. New tag numbers associated with the new loop number will be affected accordingly, that is, the measured variable of the new tag numbers will change if the measured variable of the new duplicated loop is changed. For example, if you are duplicating Loop 101-F-102 and you change the measured variable of the new loop to T, the new tag numbers associated with the new loop number will take a new instrument type in accordance with the new measured variable: source Tag Number 101-FE-102 will change to 101- TE-102.