This practical guide shows you how to complete a signed, QR-verified Raised Floor Signal Reference Grid (SRG) & ESD Grounding Test certificate in OhmCert Module #22 and how to troubleshoot non-compliant readings on site.

1. Step-by-Step OhmCert UI Workflow

  1. Open Module #22: Navigate to Raised Floor Signal Reference Grid (SRG) & ESD Grounding Test 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 "600x600 mm Copper-Strip Raised Floor SRG + Dissipative Tile") to populate target limits automatically.
  3. Enter Your Field Measurements: Fill in the measured inputs (Rack / Frame to Busbar Bonding Resistance, Point-to-Point Grid Resistance, High Frequency Impedance at 1 MHz, ESD Floor Resistance to Ground, Walking Body Voltage (STM97.2), Grid Mesh Size). Blank inputs stay neutral PENDING.
  4. Complete the 13-Point Checklist: Grade each item, attach photos if needed, and export the SHA-256 signed PDF certificate.

2. Worked Numerical Field Case Study

Scenario: 600x600 mm Copper-Strip Raised Floor SRG + Dissipative Tile (IEEE 1100 / TIA-607-D) — Standard data center raised floor SRG with 2.5E7 Ohm static dissipative tiles..

  • Rack / Frame to Busbar Bonding Resistance: 45 mOhm
  • Point-to-Point Grid Resistance: 18 mOhm
  • High Frequency Impedance at 1 MHz: 0.35 Ohm
  • ESD Floor Resistance to Ground: 25000000 Ohm
  • Walking Body Voltage (STM97.2): 28 V
  • Grid Mesh Size: 0.60 m

3. Engineering Troubleshooting: Corrective Actions When a Reading Fails

  1. Replace long round grounding wires between cabinets and the SRG with short (< 0.5 m) flat tinned-copper braided straps.
  2. Clean and re-torque oxidized pedestal-to-stringer and SRG clamp intersections where node resistance exceeds 100 mOhm.
  3. Strip insulating floor wax and apply antistatic ESD topical treatment if tile resistance exceeds 1.0E9 Ohm or walking voltage exceeds 100 V.

→ Try This Worked Example Live in Module #22 (SRG & ESD Grounding)