Catalog > Test and Measurement > Test and Measurement Instruments > Special Function Testers > Digital Clamp Meters Clamp Earth Ground Digital Tester Clamp Earth Ground Digital Tester UNI-T UT278A CLAMP EARTH GROUND DIGITAL TESTER RES:100~1200Ω , LEAKAGE CURRENT:0MA~30A , JAW 32mm , FREQ:1KHz , CURRENT LIMIT ALARM , 50/60Hz , RS232 , VISUAL & AUDIBLE ALARM , JAMMING SIGNAL RECOGNITION , OVER RANGE DISPLAY , DATA STORAGE:99 , CAT III 300V Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications Earth Ground Resistance (Ω) 0.01~0.099Ω : ±(1%+0.01) 0.1~0.99Ω : ±(1%+0.01) 1~49.9Ω : ±(1%+0.1) 50~99.5Ω : ±(2%+0.5) 100~199Ω : ±(3%+1) 200~395Ω : ±(6%+5) 400~590Ω : ±(10%+10) 600~800Ω : ±(20%+20) 800~1200Ω : ±(25%+30) Leakage current (A) 0mA~9mA : ±(2.5%+1mA) 10mA~99mA : ±(2.5%+5mA) 100mA~299mA : ±(2.5%+10mA) 0.3A~2.99A : ±(2.5%+0.1A) 3A~9.9A : ±(2.5%+0.3A) 10A~20A : ±(2.5%+0.5A) 3A~30A : ±(2.5%+0.5A) Display count : 4 digits LCD display Jaw opening : 32mm Resistance measurement : frequency : ＞1kHz : Yes Single measurement time : 1 second : Yes Current limit alarm 1mA~499mA : Yes Current measurement frequency : 50Hz/60Hz : Yes Auto power off RS-232 : Yes Visual and audible alarm : Yes Jamming signal recognition : Yes Over-range display : Yes Data storage : 99 General Characterisitics Power : 1.5V battery (LR6) x 4 Display : 47mm x 28.5mm Product color : Red and grey Product net weight : 1160g Product size : 285mm x 85mm x 56mm Downloads Datasheet - UNI-T UT278A PDF File 102.15 KB