Feature: 1. Soil resistivity tester supports 2, 3 and 4?wire grounding resistance measurement. 2. 4?digit large LCD display with white screen backlight, suitable for use in dimly lit places. 3. IP65 protection grade, good waterproof, compact and portable, supports multiple functional tests. 4. Ground resistance measurement range is 0.00?30.00k??, and soil resistivity is 0.00??m?9000k??m. 5. Support ground voltage, AC voltage measurement, high accuracy, long-term use. Specification: Item Type: Soil Resistivity Tester Material: ABS Model: ETCR3100C Function: 2, 3 and 4 wires to measure grounding resistance, soil resistivity; grounding voltage, AC voltage measurement Working Voltage: DC7.4V 2600mAh x1 Rechargeable lithium battery, the battery is fully charged about 8.4V (built-in battery) Adapter: US Standard AC100-240V Range: 1. Grounding Resistance: 0.00 - 30.00k?? 2. Soil Resistivity: 0.00??m - 9000k??m 3. Grounding Voltage: 0V - 600V Measurement Method: Precise 4-wire, 3-wire method measurement, simple 2-wire measurement of ground resistance Measurement: Grounding Resistance: Rated current pole changing method, measuring current 20mA Maximum Soil Resistivity: Quadrupole Method (Winner Method) Voltage To Ground: Average Value Rectification (Between P(S)-ES Interface) Test Frequency: 128Hz/111Hz/105Hz/9Hz (AFC) Short Circuit Test Current: AC 20mA Maximum Open Circuit Test Voltage: AC 40V Maximum Test Voltage Waves: Sine Waves Electrode Spacing Range: 1m-100m can be set Shift: 1. Grounding Resistance: 0.009-30.00k?? Automatic Gear Shift 2. Soil Resistivity: 0.00??m-9000k??m Automatic Gear Shift Backlight: Controllable white screen backlight, suitable for dim places Display Mode: 4-Digit Large LCD Display, White Screen Backlight Measurement Indication: LED flashes during measurement, LCD countdown, progress bar graph indication Measure Time: 1. Voltage to ground: about 3 times/sec. 2. Grounding resistance, soil resistivity: about 5 seconds/time Measurement Times: More than 5000 times (short-circuit test, test once, stop for 30 seconds and then test) Line Voltage: Measurement below AC600V Communication Interface: With USB interface, software monitoring, stored data can be uploaded to the computer, saved and printed Data Storage: 300 groups, "MEM" storage indication, display "PULL" sign to indicate that the storage is full Data Retention: "HOLD" sign indicates when data is retained Data Access: "READ" sign indicates when accessing data Overflow Display: "OL" sign indication when over-range overflow Interference Test: Automatic identification of interference signals, the "NOISE" sign indicates when the interference voltage is higher than 5V Auxiliary Grounding Test: With auxiliary grounding resistance test function, 0.00K??-30k?? (100R+rC