This practical guide shows you how to complete a signed, QR-verified Earth Resistance & Equipotential Bonding Test Report certificate in OhmCert Module #01 and how to troubleshoot non-compliant readings on site.

1. Step-by-Step OhmCert UI Workflow

  1. Open Module #01: Navigate to Earth Resistance & Equipotential Bonding Test Report from the Dashboard.
  2. Load a 1-Click Standard Annex Preset: Open the blue Standard Annex banner at the top and click a preset (such as "TT System + 30 mA RCD (Dry Area 50 V)") to populate target limits automatically.
  3. Enter Your Field Measurements: Fill in the measured inputs (Measured Earth Electrode Resistance Ra, Protective Device Operating Current Ia, Permissible Touch Voltage UL, Equipotential Bonding Continuity, Soil Resistivity (Wenner)). Blank inputs stay neutral PENDING.
  4. Complete the 14-Point Checklist: Grade each item, attach photos if needed, and export the SHA-256 signed PDF certificate.

2. Worked Numerical Field Case Study

Scenario: TT System + 30 mA RCD (Dry Area 50 V) (IEC 60364-4-41) — Sets UL = 50 V AC and Ia = 0.03 A (30 mA RCD). Seasonal stability ceiling 200 Ohm applies..

  • Permissible Touch Voltage UL: 50 V
  • Protective Device Operating Current Ia: 0.03 A

3. Engineering Troubleshooting: Corrective Actions When a Reading Fails

  1. Drive deeper coupled copper-bonded rods to reach permanent moisture tables where Wenner profiling shows lower deep-layer rho.
  2. Install a perimeter ring conductor (Type B electrode per IEC 62305-3) or parallel interconnected rods spaced >= 2x rod length apart.
  3. Apply low-resistivity conductive earth enhancement compound (bentonite / Marconite) in high-resistivity rocky or sandy ground (> 500 Ohm-m).

→ Try This Worked Example Live in Module #01 (Earth Resistance & Bonding)