... (9), 3999 (9) a display of the digital multimeter. 4. Manual and semi-auto inspection 0.2 ... % and below levels of digital multimeter, an analogue meter installation type digital instrument, including DC ... distortion degree ≤0.3%; Sine wave output frequency range (45-65) N Hz (N = 1, 2, 3,...... ... wave output range (using AC voltage, current output provide) (45-65) N Hz (N = 1, 2, 3,...... ...