Armada Technologies ERT100 Digital Earth Resistance Tester Grounding Safety Kit

Product Details

The Armada Technologies ERT100™ is a professional-grade diagnostic instrument designed to measure the effectiveness of earth grounding systems. In the irrigation and electrical industries, a high-quality ground is the only defense against lightning strikes and power surges that can destroy expensive controllers and decoders. The ERT100 allows contractors to verify that a grounding installation meets manufacturer and safety specifications (typically 25 Ohms or less). Featuring both 2-pole and 3-pole testing methods, a large backlit LCD with an analog bar graph, and the ability to store 100 measurement sets, the ERT100 is an essential tool for certifying new installations and troubleshooting existing lightning protection systems.

Key Features:

• 2-Pole & 3-Pole Testing: Supports the standard "Fall of Potential" method (3-pole) for maximum accuracy and the simplified 2-pole method for quick checks using existing grounds.
• High-Resolution Display: Features a large, backlit digital display complemented by a real-time analog bar graph for easy viewing in low-light conditions.
• Data Memory: Internal storage holds up to 100 sets of measurement data, allowing you to document an entire site before returning to the office.
• Safety Voltage Check: Automatically checks for earth voltage (interference) before testing to ensure the safety of the operator and the accuracy of the reading.
• Constant Current Inverter: Utilizes an 800Hz / 3mA constant current inverter to provide stable readings even in soils with high electrical noise.

Specifications:

• Earth Resistance Range: 0 to 4,000 Ω
• Earth Voltage Range: 0 to 200V AC (50/60Hz)
• Memory Capacity: 100 Results
• Power Supply: 6x 1.5V AA Batteries
• Safety Rating: CAT III 300V / CE Rated
• Weight: 1.98 lbs (Unit) / Approx. 7.6 lbs (Complete Kit)

What's Included in the Box:

• 1 x ERT100 Digital Tester
• 2 x Auxiliary Earth Ground Stakes
• 3 x Color-Coded Test Leads (Red-15m, Green-10m, Black-5m)
• 1 x Professional Carrying Bag with Shoulder Strap
• 1 x Comprehensive User Guide

Best Practices for Accurate Ground Testing:

• Stake Spacing: For a standard 3-pole test, place the stakes in a straight line from the ground rod. Proper distance (usually 20-40 feet between stakes) is critical for an accurate "resistance area" reading.
• Good Contact: Ensure the ground stakes are driven deep into firm soil. If the soil is extremely dry or sandy, pouring a little water around the stakes can improve conductivity for a more reliable test.
• Disconnect the Ground: For the most accurate "isolated" reading of a ground rod, disconnect the grounding conductor from the equipment before performing the test.
• Document Your Results: Use the internal memory to save readings at different points on the property to identify areas where soil resistivity may vary.

Common Questions:

Q: Why do I need 4,000 Ohms of range if a "good" ground is 25 Ohms?

A: The higher range is vital for measuring soil resistivity before a grounding system is even installed, helping you determine how many rods or plates will be needed to reach your target Ohms.

Q: Can I use this to test my house's electrical ground?

A: Yes. The 2-pole method is frequently used to verify the resistance of a building's safety ground by referencing it against a known good ground (like a metal water main).

Q: Is this the same as a "Megger"?

A: No. A "Megger" or Insulation Tester measures very high resistance (millions of Ohms) to check for wire leaks. The ERT100 measures very low resistance (0-4000 Ohms) specifically for earth grounding paths.

The Armada ERT100 ensures your lightning protection isn't left to chance, providing the certified data you need to protect your customers' investments.