62c12 and 63c7 meters are grade 2.5 meters with internal magnetic steel structure for magnetoelectric switch board, which are used to measure the current and voltage in DC circuit. According to the needs of customers, 62c12 and 63c7 voltmeters have been derived from the following products: speedometer for measuring the welding speed of electric welding machine, instrument for measuring the longitudinal and transverse swing of ship and the opening angle of fin angle.
| Type | Range | Connection method | |
| Ammeter | Ampere | 5；7.5；10；15；20；30；50. | Matching with GDF1 external separator |
| ±5；±7.5；±10；±15；±20；±30；±50. | |||
| Ampere | 5；100；150；200；250；300；500；750；1000. | Matching with GDF2 external separator | |
| ±75；±100；±150；±200；±250；±300；±500；±750；±1000. | |||
| voltmeter | Voltage | 3；7.5；15；30；50；75；100；150；250；300. | Direct connection |
| Voltage | ±3；±7.5；±15；±30；±50；±75；±100；±150；±250；±300. | Direct connection | |