Super User Specifications Compliance: -3, +14 V Control voltage: -3, +10 V EIS measurement: 3 MHz (1%, 1°) 7 MHz (3%, 3°) Current ranges: 4 A to 1 μA Current resolution 760 fA (standard board) Low current: 6 ranges from 100 nA to 1 pA with resolution to 76 aA) Floating mode Analog filtering Calibration board Full stability control mode (9 bandwidths)