Extech GRT300 4-Wire Earth Ground Resistance Tester Kit

Measure earth ground in 4 ranges from 2 to 2000 Ohm.

• 4-wire, 3-wire, and 2-wire testing
• Large dual line LCD
• Autoranging
• Automatic I (current) spike check
• Automatic P (potential) spike check
• Test Hold function for easy operation
• Automatic Zero adjustment
• AC Earth Voltage
• Data Hold and Auto Power off
• Overrange and low battery indication
• Complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, and eight 1.5V AA batteries

• Earth Ground Resistance Ranges: 2 Ohm/ 20 Ohm/ 200 Ohm/ 2000 Ohm
• Basic Accuracy: ±(2%rdg+3d)
• Resolution: 0.01 Ohm/ 0.1 Ohm/ 1 Ohm/ 0.01 kOhm
• Test Current / Frequency: <2mA / 820Hz
• AC Earth Voltage / Frequency: 0 to 300VAC / 40 to 500Hz
• Accuracy: ±(2%rdg+3d)
• Power Supply: Eight 1.5V ‘AA’ Batteries
• Dimensions: 9.8 x 7.8 x 4.3″ (250 x 190 x 110mm)
• Weight: 3.15lbs (1430g) (batteries included)

• Extech GRT300 Data Sheet.pdf
• Extech GRT300 User’s Manual.pdf