These meters are accurate, and are available in compact size of 96 X 96 X 60mm. Normally available for CT operated AC application, the Ammeter is also available for ranges of 0-2mA, 0-20mA, 0-2A and 0-5A, direct reading DC or AC. CT operated Ammeters are available in two versions. Factory set CT ratio: The CT ratio specified by the user is programmed into the meter, the meter then shows the CT primary current based on the secondary current received by it. Scalable CT ratio: The User can select the CT ratio by means of a DIP switch located at the rear of the meter. The meter is programmed for a CT secondary rating of 5Amps. The CT primary rating is selectable from 100 Amps to 1600 Amps in steps of 100 Amps. This version enables reduction of inventory and also avoids re-calibration in case of changes at Scalable CT ratio.