The AEMC Digital Ground Resistance Tester Model 6470-B performs grounding resistance, earth coupling measurement, soil resistivity and bonding tests

This direct reading tester measures from 0.01 to 99,000Ω, and is auto-ranging, automatically seeking out the optimum measurement range test current and test frequency. Easy-to-use — simply connect the leads, select the test mode, Press-to-Measure and read the results. Up to 512 test results can be stored in internal memory for later recall to the display or download to a PC for analysis and hard copy reports.

Features / Specs:

4-Point Earth Resistance Measurement
Range (Auto-Ranging)	0.011Ω to 99.99kΩ
Resolution	0.001 to 10Ω
Accuracy	±(2% Reading +1ct)
Test Voltage	16V or 32V; 41 to 513Hz
Test Current	Up to 250mA
3-Point Earth Resistance Measurement
Range (Auto-Ranging)	0.09Ω to 99.9kΩ
Resolution	0.01 to 100Ω
Accuracy	±(2% Reading +1ct)
Test Voltage	16V or 32V; 41 to 513Hz
Test Current	Up to 250mA
Soil Resistivity 4-Point Measurement
Test method	Wenner or Schlumberger selectable with automatic calculation
Range (Auto-Ranging)	0.01Ω to 99.9kΩ; ρ max: 999kΩm
Resolution	0.01 to 100Ω
Accuracy (Typical)	±(2% Reading +1ct)
Test Voltage	16V or 32V; 41 to 128Hz selectable
DC Resistance Measurement (Bond Testing) 2-Pole (with lead resistance compensation) or 4-Pole (Kelvin sensing)
Range (Auto-Ranging)	2-pole: 0.12Ω to 99.9kΩ 4-pole: 0.020Ω to 99.99kΩ
Resolution	2 -pole: 0.01 to 100Ω 4-pole: 0.001 to 10Ω
Accuracy (Typical)	±(2% Reading +2ct)
Test Voltage	16VDC; (+, – or auto polarity)
Test Current	Up to 250mA
External Voltage Measurement
Range	0.1 to 65VAC/DC – DC, 15 to 440Hz
Accuracy	±(2% Reading +1ct)
General Features
Memory	512 measurements (64KB)
Communication	USB 2.0 optically isolated, DataView software included
Power Source	9.6V rechargeable battery pack with external 110/220V charger
Battery Life	1500 tests typical in automatic mode
Dimensions	10.7 x 9.80 x 5.12” (272 x 248 x 130mm)
Weight	7 lbs (3.2kg) with battery
Case	UL V0 Polypropylene
Operating Temperature	32° to +113°F (0° to +45°C)
Storage Temperature	-40° to 158°F (-40° to +70°C)
Relative Humidity	Up to 90%
Ingress Protection (IP)	IP 53 with cover closed
EMC	EN 61326-1
Safety Compliance	IEC 61010-1, EN 61557, 50V CAT IV, Pollution Degree 2

Documentation:

Equipment Specifications