... charge testing auto conversion.2. Minimum resolution of current up to 1nA, zeroing by button pressing.3 ... . Locking function of test current value, strong anti-interference ability.Specifications:1. Test ... 3 ranges adjustable, and accuracy 1% + 3 digits2. Leakage Current Range: 0.1nA to 20.00m A, accuracy 1 ... 100*400mm9. Weight: about 6kg Programmable Capacitor Leakage Current Tester