BRYMEN BM 257S Universal Meter with USB is a professional, compact multimeter with an interesting selection of functions and measurement capabilities and the highest degree of protection. Thanks to their compact size and a large number of functions, these meters are very popular in maintenance services, industry and energy: from industrial automation to the installer. The BM 250s series features improved ergonomic housings. The BM 257s has an innovative AutoCheck function that allows automatic measurement of ACV, DCV and R without selecting these functions. In doing so, voltages are measured at reduced impedance - which is important when measuring electrical installations. The BM 257s also allows the measurement of fairly short pulses and inrush currents with a duration of no less than 5ms (CREST function). The instrument has an optical USB connector for PC cooperation and a non-contact AC voltage identification function. Special functions: AutoCheck - automatic selection of LoZ DCV, LoZ ACV, ? thanks to input signal analysis and the instrument's internal algorithm, which provides measurements with reduced impedance (BM 257s) CREST - registration with automatic change of ranges of MAX, MIN,MAX-MIN (Vp-p) values of pulses with duration > 5ms REC - 50ms registration with automatic change of ranges of MAX,MIN, MAX-MIN and AVG (average) values from measurements BEEP-JACK - audible and visual alarm for bad wire connection EF-Detection - non-contact detection of the presence of AC voltage Measurements, ranges: - DC voltage [V]: 0,01...60mV/600mV/6V/60V/1kV - AC voltage [V]: 0,01...60mV/600mV/6V/60V/600V/1kV - dc current [A]: 0,1...600µA/6000µA/60mA/600mA/6A/8A - AC current [A]: 0,1...600µA/6000µA/60mA/600mA/6A/8A - resistance [Ω]: 100mΩ/...600Ω/6kΩ/60kΩ/600kΩ/6MΩ/60MΩ - capacitance [F]: 10pF/...60nF/600nF/6µF/60µF/600µF/3000µF - frequency [Hz]: 6V (10.00Hz~10.0kHz), 60V~600V (10.00Hz~50kHz), 1000V (45Hz~1kHz) (sensitivity from 400mV to 400V for sine wave) - temperature [°C]: -50...1000°C Functions, features: - display: LCD 6000 with 24-element bargraph - sampling: 5 times/s - True RMS - interface: optical USB - REL function (relative value measurement) - diode test - circuit continuity test - Data Hold - range selection: automatic; manual - measurement memory: MIN; MAX - Auto Power Off - polarity indicator - overrange indicator - low battery voltage indicator - NCV - built-in non-contact AC voltage detector - AutoCheck function - automatic selection of LoZ DCV, LoZ ACV, and ? - standards: CE, EN61010, 300V CAT IV, 600V CAT III, 1000V CAT II - power supply: 2x 1.5V (AAA) batteries - dimensions: 80x161x50mm - weight: 340g - gross weight: 530g Included: - test leads - batteries - instruction - temperature probe - K thermocouple