Feature: 1. Equipped with a large LCD display with blue backlight and bar graph, the readings are more clear and accurate. 2. Using the latest digital and microprocessing technology, accurate 4pole, 3pole and simple 2pole methods for grounding resistance measurement, FFT and AFC technology introduced. 3. With USB interface, support data upload function and alarm function, data storage up to 300 groups, easy to detect. 4. Unique antiinterference ability and adaptability to environment, the consistency of repeated tests, to sure the high accuracy and high stability of longterm measurement. 5. Widely used in electricity, telecommunications, meteorology, oil fields, construction, industrial electrical equipment and other grounding, soil resistivity, ground voltage, AC voltage measurement. Specification: Condition: New Item Type: Earth Resistance Tester Material: ABS Basic Conditions and Working Conditions Influence Basic Conditions Working Environment Note Ambient Temperature 231 -10-40 Environment Humidity 40%-60% 80% Operating Voltage 9V0.1V 9V1.5V rC, rP Auxiliary Ground Resistance 100 30k Interference Voltage No 20V Interference Current No 2A Electrode Distance When Measuring R A>5d A>5d Electrode Distance When Measuring A>20h A> 20 H Features Measure 2/3/4 Pole Grounding Resistance, Soil Resistivity, Grounding Voltage, AC Voltage Power Supply DC 9V (Zi-Mn dry battery R14S 1.5V 6 PCS, 300 hours of continuous standby) (Battery Not Included) Measuring Range Grounding Resistance: 0.00-30.00k Soil Resistivity: 0.00m-9000km Measurement Method Accurate 4-Pole Measurement, 3-Pole Measurement, Simple 2-Pole Measurement Measurement Methods Grounding Resistance: Rated Current Pole Changing Method, Measuring Current Maximum 20mA Soil Resistivity: 4-Pole Measurement (Winner Method) Ground Voltage: Average Rectification (Between P(S)-ES) Measuring Frequency 128Hz / 111Hz / 105Hz / 94Hz (AFC) Short Circuit Test Current AC Maximum 20mA Open Circuit Test Current AC 40V or Less Test Voltage Waves Sine Waves Electrode Distance Range Can be set from 1m-100m Transfer Grounding Resistance: 0.00-30.00k, automatic shift Soil Resistivity: 0.00m-9000km, Automatic Shift Backlight Blue screen backlight, suitable for dim places Display Mode 4-digit large lcd display with blue screen backlight Measurement Standard During the measurement, LED flashes indicator, LCD countdown display, progress bar indicator LCD Frame Size Approx. 128x75mm / 5.0x3.0in LCD Window Size Approx. 124x67mm / 4.9x2.6in Size Approx. 215x170x75mm / 8.5x6.7x3.0in Standard Test Line 4 Lines: each red 20m, black 20m, yellow 10m and green 10m Simple Test Line 2 Lines: red 1.6m and black 1.6m Auxiliary Earth Rod 4 Rods: 10x150mm / 0.4x5.9in Measurement Rate Ground voltage: about 3 times/sec Grounding Resistance, Soil Resistivity: About 5 Seconds/Time Measure Time More than 5000 times (short circuit test, the interval time should be at least 30 seconds) Line Voltage Below AC 600V RS232 Interface With RS232 interface, software monitoring, stored data can be uploaded to the computer, saved or printed. Communication Line One RS232 communication line, length 1.5m Data Storage 300 sets, "MEM" icon storage indicator, flashing "FULL" icon indicates that the storage is full Data Retention Data retention function: "Hold" icon display Data Access Data reading function: "READ" icon display Overflow Display Over-range overflow function: "OL" icon display Interference Test Automatically identify interference signals, and display "NOISE" icon when the interference voltage exceeds 5V Auxiliary Ground Test Can measure auxiliary grounding resistance, 0.00K-30k (100R + rC