Key facts
- Brand
- EXTECH
- Model
- GRT300
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Extech GRT300 4 Wire Earth Resistance Tester User Guide
This document is the user guide for the Extech GRT300, a microprocessor-controlled 4 Wire Earth Resistance Tester. The device features an auto-ranging capability with four ranges (0-20, 0-200, 0-2000, and 0-2kΩ) and supports 2-wire, 3-wire, and 4-wire testing methods. It also includes an earth voltage measuring range of 0-300Vac and automatic spike checks.
Read onlineEXTECH GRT300 specifications
| Measuring Ranges Earth Resistance | 0-2, 0-200, 0-2000, 0-2kΩ |
|---|---|
| Earth Voltage Range | 0-300V AC (40 to 500Hz) |
| Accuracy Earth Resistance | +(2%rdg+3dgt) |
| Test Frequency | 820Hz |
| Test Current | 2mA |
| Power Source | 1.5V(AA) x 8 |
| Dimensions | 250(L) x 190(W) x 110(D)mm |
| Weight | Approx. 1430g(battery included) |
Source: Extech GRT300 4 Wire Earth Resistance Tester User Guide
All EXTECH GRT300 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How many batteries are required for the Extech GRT300?
The tester requires eight 1.5V AA light batteries.
From: Extech GRT300 4 Wire Earth Resistance Tester User Guide
What is the maximum ambient temperature for operation?
The operating ambient temperature range is 0 to 50°C (32 to 122°F).
From: Extech GRT300 4 Wire Earth Resistance Tester User Guide
What testing modes does the GRT300 support?
The device supports 4-wire, 3-wire, and 2-wire testing.
What is included in the GRT300 kit?
The kit includes test leads with alligator clips, 4 auxiliary earth bars, a hard carrying case, and eight 1.5V AA batteries.