The BRYMEN BM 859s meter with USB offers a multitude of functions, including current loop measurement (4~20mA), attenuation (dBm) and two-channel temperature measurement. The instrument measures the true rms value of AC currents and voltages also with a DC component (True RMS AC&AC+DC) in a frequency band of 20Hz~100kHz for voltages and 40Hz~10kHz for currents. The baseline accuracy of the instrument is 0.02% (DCV), which combined with high resolution (counting up to 500,000 max) and a very high level of protection gives a high-end instrument that we can call a "portable laboratory." A high degree of safety (CAT IV 600V), surge protection (8kV) and overload protection on all ranges (1100V AC/DC for V, 100AC/DC for mV, Ω and other functions) allows the meters to be used in industry and energy, extreme conditions while ensuring the safety of measurements and full protection against damage. Special functions and features: CREST - registration with automatic change of ranges of MAX, MIN and MAX-MIN values of pulses with a duration of not less than 0.8ms REC - 50ms registration with automatic change of ranges of MAX, MIN and MAX-MIN values from measurements BEEP-JACK - audible and visual alarm for bad connection of measurement wires 50/60Hz filter - allows to eliminate the influence of interference from the mains on the indications Measurements, ranges: - DC voltage [V]: 0,001...500mV/5V/50V/500V/1kV - AC voltage [V]: 0,001...500mV/5V/50V/500V/1kV - dc current [A]: 0.01...500µA/5000µA/50mA/500mA/5A/10A/20A