EM3350 Large Grounding Network Earth Resistance OnLine Monitor is also known as earth grid grounding impedance online tester, earth grid online tester, which is used for online monitoring of substation ground network, power plant, microwave station, communication base station and other large ground network grounding parameter. The monitor is powerful and can test power frequency grounding impedance, grounding conduction resistance, soil resistivity, step voltage, contact voltage, potential gradient and other power frequency characteristic parameters.
EM3350 Large Grounding Network Earth Resistance OnLine Monitor is manufactured according to the 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 ll: Power Frequency Grounding Resistance Tester. The monitor has unique grounding pile, cable diagnostic function and self-checking function to ensure the accuracy of test result. And the instrument also adopt with 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.
EM3350 Large Grounding Network Earth Resistance On-Line Monitor has storage, time function, automatically record 1000 groups test result containing date & time. The instrument with Bluetooth communication that support Android system and RS485 communication, users can set up the wired network system or wireless network system to realize remote online monitoring the earth grid grounding system.
ETCRMETER is a high-end brand of ETCR. All products are manufactured by ETCR, which also provides technical support and after-sales service.

Product Features
1. Comprehensive online monitoring the power frequency characteristic parameter of large grounding grid earth resistance.
2. The output current is 1A~5A and the voltage is 400V. Adopts automatic frequency conversion technology and software and hardware filtering technology, which makes the instrument with high anti-interference performance and ensures stable and reliable test data.
3. With test function of current pile and voltage pile, which is used to diagnose the fault of poor connection of line contact and poor grounding between voltage pile and current pile.
4. Self-checking function, Equipped with 0.5Ω standard resistor for self-checking at any time to ensure the accuracy of the test result.
5. Alarm function: setting alarm threshold
6. Data storage: 1000 groups
7. Bluetooth communication
8. With RS485 communication to realize remote on-line monitoring large grounding grid earth parameter.