Clamp Earth Ground Tester UNI-T UT278A Clamp Earth Ground Tester UNI-T UT278A TECHNICAL SPECIFICATION Earth Ground Resistance (Ω) 0.01Ω-0.099Ω ±(1%+0.01) 0.1Ω-0.99Ω ±(1%+0.01) 1.0Ω-49.9Ω ±(1%+0.1) 50Ω-99.5Ω ±(2%+0.5) 100Ω-199Ω ±(3%+1) 200Ω-395Ω ±(6%+5) 400Ω-590Ω ±(10%+10) 600Ω-800Ω ±(20%+20) 800Ω-1200Ω ±(25%+30) Leakage Current (A) 0mA-9mA ±(2.5%+1) 10mA-99mA ±(2.5%+5) 100mA-299mA ±(2.5%+10) 0.30A-2.99A ±(2.5%+0.1) 3.0A-9.9A ±(2.5%+0.3) 10.0A-20.0A ±(2.5%+0.5) 3A-30A ±(2.5%+0.5) FEATURES Display Count 4 Auto Range √ Jaw Capacity 32mm Single Measure Time 1s Resistance Measurement Frequency ＞1KHz √ Current Measurement Frequency 50Hz/60Hz √ Resistance Limit Alarm 1Ω-199Ω √ Current Limit Alarm 1mA-499mA √ RS-232 √ Beeper and Light Alarm √ Jamming Signal Recognition √ Over-Range Display √ Low Battery Indication √ Data Logging 99 GENERAL CHARACTERISTICS Power: 1.5V Alkaline Battery X4 LCD Size: 47mm X 28.5mm Product Weight 1160g Product Size 285mm X 85mm X 56mm ACCESSORIES Batteries, Test Ring, Tool Box MANUFACTURER UNI-TREND Manual de utilizare https://www.uni-trend.com/uploadfile/cloud/English%20manual/General%20Meters/UT276A%20UT278A%20English%20Manual.pdf