Extech GRT300 Ground Resistance Tester, 4-Wire, 3-Wire, 2-Wire, 2-2000 Ohm

The Extech GRT300 is a versatile and reliable ground resistance tester designed for electrical maintenance professionals, safety inspectors, and industrial technicians. With its ability to perform 4-wire, 3-wire, and 2-wire testing methods, this instrument provides accurate earth ground measurements across a wide range of applications. The GRT300 measures ground resistance in four ranges from 2 to 2000 ohms, ensuring precise readings for various soil conditions and grounding systems.

Key Features & Highlights

• Multiple Testing Modes: Supports 4-wire, 3-wire, and 2-wire testing for flexibility in different grounding configurations.
• Wide Measurement Range: Measures earth ground resistance from 2 to 2000 ohms in four auto-ranging scales.
• Large Dual-Line LCD: Displays resistance and other parameters clearly for easy reading in the field.
• Automatic Spike Check: Automatically verifies the integrity of current (I) and potential (P) spikes to ensure reliable measurements.
• Test Hold Function: Freezes the displayed reading for convenient recording and analysis.
• Autoranging & Auto Zero: Automatically selects the appropriate range and zeroes the instrument for accurate results.
• Data Hold & Auto Power Off: Retains measurements and conserves battery life.
• AC Earth Voltage Measurement: Detects and displays AC earth voltage to identify potential hazards.
• Overrange & Low Battery Indication: Alerts the user to out-of-range readings and low battery conditions.
• Complete Kit: Includes test leads with alligator clips, 4 auxiliary earth bars, hard carrying case, and eight 1.5V AA batteries.

Applications

The Extech GRT300 is ideal for a variety of grounding and electrical safety applications, including:

• Verifying the effectiveness of grounding systems in residential, commercial, and industrial installations.
• Performing soil resistivity measurements for new grounding system design.
• Routine maintenance and safety checks of electrical equipment and power distribution systems.
• Testing lightning protection systems and ensuring compliance with electrical safety standards.