Digital Earth Tester Earth Ground Insulation Resistance Meter What is ground resistance? Grounding resistance is the resistance encountered when an electric current flows from a grounding device to the ground and then through the ground to another grounding body or spreads far away. The ground resistance value reflects the good contact between electrical equipment and "ground" and reflects the scale of the ground grid. Ground Resistance Tester 2000 countsCan measure ground resistance from 0 to 200000-200VAC ground voltage50Hz / 60Hz frequency The ground resistance tester has backlight and low battery voltage display data retention and storage, automatic shutdown, and power saving features. It can be used for accurate 3-wire measurements or simple 2-wire measurements. Double Insulation Ground Resistance Tester Ground resistance tester capable of accurate 3-wire measurement and simple 2-wire measurement Backlight and battery detection functionData retention and storage function (20 sets)Automatic shutdown and power saving function3-wire measurement2-wire measurementPoor test line contact, "-Q" warningOverrange "OL" displayDouble insulation / reinforced insulation safety structure Features Measurement Input Round jack for smooth insertion and easy operation Durable Protective Cover When not measuring, you can cover the cover to effectively protect the keys and screen of your device. LCD Backlight Display Measurement data function Symbol display, easy-to-understand, high-definition, backlit display is also possible Battery replacement procedure a --Power off the equipment and disconnect the associated test wire. Loosen one screw at the bottom of the cover, then open the battery compartment cover. b --Replace all 6 old batteries, insert a new one and pay attention to the polarity of the battery. c --After replacing the battery, attach the battery compartment cover and tighten the screws. Please Note: 1. If you do not use the battery for a long time, remove the battery to prevent leakage of the battery and corrosion of the battery box and pole piece. 2. Do not measure when the battery box is open Package list 1 * UT521 earth tester(battery not included)2 *Auxiliary ground nails1* Protect shell1 *Cloth pouch2 * Crocodile clip test lead (green + red)3 * Standard test lead with clip(green + yellow + red)1 * Instruction Parameter Wide Range of Applications Grounding resistance testers can be used to measure the grounding resistance of various power systems, electrical equipment, lightning protection devices, and other grounding systems. You can also measure the ground voltage. Suitable for smelting,telecommunications, manufacturing and other industries. Building Maintenance Communication Tower Smelting Industry Manufacturing