Extech GRT300 Data sheet

Specifications subject to change without notice.
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6/16/11 - R1

Includes all hardware necessary to measure earth ground

In 4 ranges from 2 to 2000Ω

4-Wire Earth Ground Resistance Tester Kit

Ordering Information:

GRT300 ..............4-Wire Earth Ground Resistance Tester Kit

GRT300-NISTL* ..GRT300 with Certificate Traceable to NIST

382153................Replacement Earth Bars (2pk)

382154................Replacement Set of Leads

*Limited NIST for Certificate of Traceability to 4-wire mode only

Features:

• 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

Specifications

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 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)

Complete with test leads with alligator clips, 4 auxiliary earth bars, hard carrying
case, and eight 1.5V AA batteries