AEMC 3640 3-Point Ground Resistance Tester

Ground Resistance Tester Model 3640 (Digital, 3-Point) Model 3640

The Digital Ground Resistance Tester Model 3640 performs ground resistance measurement. This direct reading tester measures from 10MΩ to 1999Ω, and is auto-ranging, so it automatically seeks out the optimum measurement range. The Model 3640 is easy to use - simply connect the leads, press to measure, and read. The large LCD (nearly 3/4" high) also indicates low battery status, overrange, and lead reversals.

The Model 3640 comes with 3 color- coded terminals to aid in easy hookup. Three LED indicators on the front panel continuously warn the user of any measurement problems to ensure accurate and reliable tests. The Model 3640 is fuse protected up to 250VAC to protect the instrument against voltage into the test leads. In the event of a system fault, it can with- stand 250VAC with spikes of 3000VAC or 1000VDC.

The heavy duty ABS case is O-ring sealed against dust and water and the Press-to-Measure button is also sealed. Model 3640 is battery powered, for convenient use in remote field applica- tions. Mechanical and safety specifica- tions, such as vibration and drop test, meet or exceed IEC standards, to ensure safe and reliable field use.

Ground Resistance Tester Model 3640 is a rugged, easy-to-use instrument ideal for maintenance crews performing numerous tests. The Model 3640 is designed to reject high levels of interference, therefore it can be used under difficult conditions such as high stray currents that normally affect measurement accuracy.

The Ground Resistance Tester Model 3640 is available alone or as a complete kit. The kit includes T auxiliary ground electrodes, 16 ft leads, and two 150 ft leads on reels with wind-up handles to facilitate storage, packed in a molded hard carrying case.

Features

• Fall-of-Potential method
• Measures ground resistance (2- and 3-Point)
• Auto-Ranging: automatically selects the optimum range
• Designed to reject high levels of noise and interference
• Extremely simple to operate: connect – press – read
• LED on faceplate informs operator of high input noise, high auxiliary rod resistance and fault connections
• Battery powered
• Rugged dustproof and rainproof field case
• Color-coded terminals
• May also be used for continuity tests on bonding

Applications

• Three-point measurements for measuring resistance to ground of ground rods and grids. Three-point measurements are generally used when the electrode or grid is easily disconnected, if corrosion is suspected, or where ground faults are unlikely to occur.
• Two-point tests for continuity tests on bonding or on pre-established grounds. 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.