This practical guide shows you how to complete a signed, QR-verified Battery Bank Inspection certificate in OhmCert Module #10 and how to troubleshoot non-compliant readings on site.

1. Step-by-Step OhmCert UI Workflow

  1. Open Module #10: Navigate to Battery Bank Inspection 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 "240 Cell VRLA UPS String (480V Nominal / 545V Float @ 2.27V/cell)") to populate target limits automatically.
  3. Enter Your Field Measurements: Fill in the measured inputs (Number of Cells, Measured Float Voltage per Cell, Nominal Float Voltage per Cell, Cell-to-Cell Voltage Spread, Average Internal Resistance, Baseline Internal Resistance, Capacity Test Result vs Rated, Average Cell Temperature, Specific Gravity (vented cells)). Blank inputs stay neutral PENDING.
  4. Complete the 16-Point Checklist: Grade each item, attach photos if needed, and export the SHA-256 signed PDF certificate.

2. Worked Numerical Field Case Study

Scenario: 240 Cell VRLA UPS String (480V Nominal / 545V Float @ 2.27V/cell) (IEEE 1188 VRLA) — 40 x 12V VRLA monoblocks (240 cells) at 2.27 V/cell float..

  • Number of Cells: 240
  • Nominal Float Voltage per Cell: 2.27 V
  • Average Cell Temperature: 23 degC

3. Engineering Troubleshooting: Corrective Actions When a Reading Fails

  1. Clean corroded inter-cell links, apply anti-oxidant grease, and re-torque to OEM specification if high contact resistance inflates cell mOhm.
  2. Shorten test intervals to quarterly when internal resistance rises 20-50% above baseline, and replace cells/strings exceeding +50% ohmic rise or < 80% capacity.
  3. Apply an equalizing charge on vented lead-acid strings where cell-to-cell voltage spread exceeds 0.05 V or specific gravity falls below 1.215.

→ Try This Worked Example Live in Module #10 (Battery Bank)