ETCR3300B Large Grounding Grid Earth Resistance Tester isa tester which carefully research and develop by company for testing the grounding impedance of power frequency, grounding resistance, soil resistivity and simple step voltage of substation ground network, power plant, microwave station, communication base station and other large ground networks, The instrument adpot touch colorful screen to operation, especially convenient and easy to operate, click the“HELP” key on the interface, can view the operation tips. The instrument adopts the new frequency type conversion AC power supply, microcomputer processing control and signal processing measures, which solves the anti-interference problem in the test process, simplifies the test operation process, improves the accuracy of the test results, and greatly reduces the labor intensity and test cost of the test personnel. And the instrument also adopt super strong automatic frequency conversion anti-interference technology, match with 400V/5A high-power output, can accurately measure the power frequency data of below 50Hz  under strong interference environment. It is suitable for testing the power frequency grounding impedance, grounding resistance, soil resistivity and simple step voltage and others power frequency character parameters.

ETCR3300B large Grounding Grid Earth Resistance Tester`s test timer automatically record test time, store the test result contains date/time, automatic storage test data of 1000 groups, sliding touch screen can be very convenient access to records of historical data, the completely isolated USB interface can uploaded the test data to the PC safety, make the historical data can be read, check, save and printing, etc. The instrument equip with Bluetooth communication and supports Android system. Use the mobile terminal browser to scan the QR code on the screen and download the Android version of bluetooth APP.After installing the APP, can test or read the test results with date and time in the mobile terminal. The instrument structure is strong, the instrument case is beautiful and durable, protection grade reach IP65.

The instrument is manufactured according to the Resistance Tester for JJG984-2004 Grounding Conduction Verification Regulation, DL/T475-2006 Grounding Device Characteristic Parameters Measurement Guidelines, DL/T845.2-2004 Resistance Measuring Device General Technical Conditions Part II: Power Frequency Grounding Resistance Tester.