UT521 UNI-T Digital Earth Ground Tester upto 2000 Ohms & 200V with frequency UT521 Digital Earth Tester UT520 series can perform precise 3-wire and simple 2-wire earth resistance measurement for power and electrical systems, lightning protection equipment, and ground system of all electrical equipment. This series is UNI-T’s introductory earth resistance tester with high economic value. Its light weight design is convenient for field work. UT520 series can perform precise 3-wire and simple 2-wire earth resistance measurement for power and electrical systems, lightning protection equipment, and ground system of all electrical equipment. This series is UNI-T’s introductory earth resistance tester with high economic value. Its light weight design is convenient for field work. SpecificationsRangeUT521 Earth resistance (Ω)0~20Ω±(2%+10) 0~200Ω±(2%+3) 0~2000Ω±(2%+3) AC earth voltage (V)0~200V±(1%+4) Frequency: 50Hz/60Hz√ Features Display count 2000 Manual range √ Auto power offAround 10 minutes√ Low battery indication √ Data hold √ Data storage 20 LCD backlight √ Full icon display √ Double insulation protection √ Poor contact display "...Ω"√ Over-range displayDisplay "OL"√ Simple 2-wire testing √ Precise 3-wire testing √ General Characterisitics Power1.5V battery (LR6) x 6 Display70.6mm x 34mm Product colorRed and grey Product net weight560g Product size160mm x 100mm x 70.5mm Standard accessoriesBatteries, simple test leads with alligator clips, standard test leads with alligator clips, earth spike, gallus Standard individual packingGift box, carrying bag, English manual Standard quantity per carton8pcs Standard carton measurement530mm x 300mm x 350mm (0.056 CBM per standard carton) Standard carton gross weight19kg