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GRT300 - Extech 4-Wire Earth Ground Resistance Tester

GRT300 - Extech 4-Wire Earth Ground Resistance Tester
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GRT300 - Extech 4-Wire Earth Ground Resistance Tester

Extech GRT300: 4-Wire Earth Ground Resistance Tester

Measures earth ground resistance in 4 ranges from 2 to 2000 Ohm

The GRT300 measures earth ground in 4 ranges from 2 to 2000 Ohm. 4-wire, 3-wire, and 2-wire testing. Large dual line LCD. Automatic I (current) and P (potential) spike check. Test Hold function for easy operation. Autoranging, Automatic Zero adjustment, Data Hold and Auto Power off. AC Earth Voltage. 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.

 

Features

  • 4-wire, 3-wire, and 2-wire testing
  • Large dual line LCD
  • Automatic I (current) and P (potential) spike check
  • Test Hold function for easy operation
  • Autoranging, Automatic Zero adjustment, Data Hold and Auto Power off
  • AC Earth Voltage
  • 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

 

Specifications

Specifications

Range

Earth Ground Resistance ranges

2Ω/20Ω/ 200Ω/2000Ω

Basic Accuracy

±(2%rdg+3d)

Resolution

0.01Ω/ 0.1Ω/1Ω/0.01kΩ

Test Current / Frequency

<2mA / 820Hz

AC Earth Voltage / Frequency

0 to 300VAC / 40 to 500Hz

Accuracy

±(2%rdg+3d)

Power supply

8 x 1.5V 'AA' Batteries

Dimensions

9.8 x 7.8 x 4.3" (250 x 190 x 110mm)

Weight

3.15lbs (1430g) (batteries included)

 

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