The AEMC 3640 portable digital ground resistance tester performs 3-point fall-of-potential ground resistance testing and 2-point continuity tests on bonding, and is suitable for rugged use by maintenance crews performing multiple tests. The compact unit is well-suited for a range of applications, such as testing single rod and small ground grids at telecommunications sites, cellular towers, and for lightning protection systems, grounded equipment, and new construction. The tester is designed for ease of use, with “connect–press–read” operation, three color-coded terminals, and a large Press to Measure button. The large LCD screen indicates low battery status, over-range, and lead reversals. The tester displays direct readings from 10 to 1999Ω. It is engineered to reject high levels of interference in difficult conditions, such as high stray currents that can affect accuracy. Response time is approximately six seconds for a stabilized measurement. Ground-resistance meters are used by electricians and contractors working in industrial, utility, and field servicing.
The AEMC 3640 double-insulated tester with CE mark meets or exceeds IEC mechanical and safety specifications for shock, vibration, and drop tests. It is fuse-protected and can withstand 250V RMS in the event of a system fault with spikes of 3000V AC or 1000V DC. Safety ratings includeEN61010-1, CAT III, and pollution degree 2.
Ground-resistance meters test the condition of a grounding system, and provide resistivity measurements in ohms. The meters are available in digital, analog, and clamp models. Grounding systems protect people and equipment, and provide a safe path for the dissipation of fault currents, lightning strikes, static discharges, EMI and RFI signals, and interference. Regular testing of a grounding system is important for safety and protection of equipment. For example, corrosive soil with high moisture content can degrade ground rods and connections in existing systems and increase the resistance of the system. Ground-resistance meters are used in conjunction with a variety of testing methods to troubleshoot intermittent electrical problems or as part of a regular maintenance plan.
AEMC Instruments manufactures electrical testing and measurement instruments, including clamp meters, power quality analyzers, ground resistance testers, and data loggers. The company, founded in 1893, is headquartered in Foxborough, MA.
What’s in the Box?
- AEMC 3640 Digital ground resistance tester
- (8) 1.5V AA batteries
- Soft carrying case
- User manual