Feature:1. Smart Testing: Using GPRS wireless communication, the non contact online testing through the ground wire will not affect the working.2. Reliable Work: Closed structure enables high accuracy, stability and reliability for both indoor and outdoor measurement in real time.3. Simple to Use: Enables LCD digital display and alarm threshold setting as well as sound and light alarm, the operation is very simple.4. Broad Utility: For transmission line tower grounding, meteorological thunder protection grounding, petrochemical grounding and so on.5. Easy Carrying: Comes with a compact size and a light weight, the storage and carrying of this ground resistance tester is very easy.Specification:Item Type: Ground Resistance TesterModel: ETCR2800CMaterial: PVCApplication: Suitable for transmission line tower grounding, meteorological thunder protection grounding, petrochemical grounding, communication grounding, substation grounding, railway facilities grounding, building warehouse grounding, metal loop resistance, electrical equipment grounding, etc.Function: Loop grounding resistance online monitoring, metal loop connection resistance online monitoring, grounding condition monitoring. CT Structure: Closed LoopResistance Range: 0.01-200Resolution: 0.001Accuracy: 2%rdg3dgt (205, below 70%RH)Overflow Indication: When the test value is greater than 200, the LCD displays OL. Alarm Indication: Detector with sound and light alarm and LCD display. Alarm Settings: Background SettingsWorking Temperature and Humidity: -20-55, 20%RH-90%RH. Temperature and Humidity Error: No more than 5%. Shifting: Automatic ShiftingExternal Magnetic Field: <40A/mExternal Electric Field: <1V/mSingle Measurement Time: About 0.5 seconds. Power Consumption: 12VDC 150mA, maximum. .Package List:1 x Ground Resistance Tester1 x Connecting Cable with Plug1 x Antenna2 x Rack4 x Hex Screw1 x Hex WrenchNote:1. For a single point grounding system, it is necessary to add an auxiliary ground pole to form a loop, and then install the detector. 2. Pay attention to the measurement range and operating environment specified by the detector. 3. The detector is divided into an open close structure and a closed loop structure. The front and rear seats of the open close structure detector are paired at the factory and cannot be exchanged with the front and rear seats of other detectors, otherwise the test accuracy will be seriously affected. When installing, please check whether the body codes of the front and rear seats are the same. 4. Please keep the joint surfaces of the upper and lower seats clean when installing, and tighten the screws of the upper and lower seats when fixing them. 5. When used in dangerous places, the external power supply must be connected to the detector through the safety barrier, and the safety barrier should be placed in the non hazardous area.