The 3640 is so easy to use, just connect the leads, press to measure, and read. The large LCD is nearly 3/4 inch high and indicates lead reversals, over range, and low battery status. 3 LED indicators on the front panel warn the user continuously of measurement problems to assure reliable and accurate tests.

The 3640 is fuse protected up to 250 Volts AC.

3640 Features

• Fall of Potential method
• Measures 2 and 3-Point ground resistance
• Auto ranging
• Engineered to reject high levels of interference and noise
• LED on faceplate alerts user of fault connections, high auxiliary rod resistance, and high input noise
• Battery powered
• Rugged rainproof and dustproof field case
• Color coded terminals
• Can be used for continuity tests on bonding

The 3640 is perfect for maintenance crews performing numerous tests, and is used in difficult conditions such as high stray currents that adversely affect accuracy. The 3640 can perform the following tests:

• 3-point measurements for measuring resistance to ground of grids and ground rods.
• 3-point measurements are usually used when the grid or electrode is easily disconnected, if corrosion is suspected, or where ground faults are unlikely to occur.
• 2-point tests on pre-established grounds or for continuity on bonding. This test is commonly performed in urban environments where proper auxiliary electrode placement may be obscured by confined real estate. Measurements are referenced against a good local ground conductor.