MEGABRAS MTD-20KWe 數字接地電阻測試儀The MTD-20KWe digital earth tester allows for the measurement of Earth Resistances and Soil Specific Resistivity, and also the spurious voltages caused by parasitic voltages present in the soil.This equipment is suitable for fast and easy measurement of the grounding resistance in house and industrial buildings, hospital installations, lightning rods, antennas, substations, etc. Soil resistivity measurement allows for soil stratification in order to optimize the most complex grounding systems engineering.Its state-of-the-art system of active and passive filters provides it with high immunity to electric interferences, making it possible to obtain reliable measurements even in the presence of spurious voltages, such as the ones that can be found in some urban areas and near primary substations.A 1,470 Hz internal generator injects alternated current on the soil through an auxiliary rod. The voltage generated over the earth resistance is measured by the apparatus, and the resistance value is evaluated. The test current is automatically regulated.It has an audible signal which advises the operator when the generated current is not enough to carry out reliable measurements. Due to the fact that it may not be noticed, this alarm also prevents further testing. Because of its wide range of measurement (from 0.01 Ω up to 20 kΩ), this equipment allows for reliable testing in all kinds of soils, including those that offer very high resistivity. The use of this instrument is very simple, it has a high-visibility 3? - digit display with direct readings, even under sunlight.This earth tester is supplied with a rechargeable internal battery. The smart charger is microprocessor-controlled, and can be powered from a 12 V car battery (or a similar one).It has a sturdy, easy and safe to carry cabinet, with IP54 protection level. It is suitable to work under adverse geographical and environmental conditions, with extreme temperatures in cold or tropical regions and in high mountain areas, showing a reliable performance in the field.3? digits displayEarth Resistence measurementSpurious voltage measurementResolution: 0.01 ΩResistence reading: up to 20 kΩAudible signal indicates anomalies in the current circuitAccessories4 Steel rods (50 cm). 1 Rod extraction tool.1 AC adapter for the battery charger.1 Connection cable to use an external 12 V battery (car battery or similar) to charge the internal battery.1 40 m red lead (on spool).1 20 m blue lead (on spool).1 20 m green lead (on spool).1 5 m black lead.1 5 m green lead.1 Mallet.1 Tape measure.1 Carrying bag.1 User guide.