English Datasheet

4-Wire Earth Ground Resistance Tester Kit
Includes all hardware necessary to measure earth ground
In 4 ranges from 2 to 2000Ω
• 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
Basic Accuracy
Test Current / Frequency
AC Earth Voltage / Frequency
Power supply
2Ω/20Ω/ 200Ω/2000Ω
0.01Ω/ 0.1Ω/1Ω/0.01kΩ
<2mA / 820Hz
0 to 300VAC / 40 to 500Hz
Eight 1.5V ‘AA’ Batteries
9.8 x 7.8 x 4.3" (250 x 190 x 110mm)
3.15lbs (1430g) (batteries included)
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
Specifications subject to change without notice.
6/16/11 - R1
Copyright © 2010-2011 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.
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