This practical guide shows you how to complete a signed, QR-verified UPS Battery Thermal Runaway & BMS Audit certificate in OhmCert Module #20 and how to troubleshoot non-compliant readings on site.
1. Step-by-Step OhmCert UI Workflow
- Open Module #20: Navigate to UPS Battery Thermal Runaway & BMS Audit from the Dashboard.
- Load a 1-Click Standard Annex Preset: Open the blue Standard Annex banner at the top and click a preset (such as "Healthy VRLA Cabinet (Tcell=25.5C, Tamb=23.0C, Spread=1.2C)") to populate target limits automatically.
- Enter Your Field Measurements: Fill in the measured inputs (Maximum Cell Temperature, Room Ambient Temperature, Cell-to-Cell Temperature Spread, Float Voltage Deviation, Highest Cell Internal Resistance, Baseline Internal Resistance, Float Charge Current, Baseline Float Charge Current). Blank inputs stay neutral
PENDING. - Complete the 17-Point Checklist: Grade each item, attach photos if needed, and export the SHA-256 signed PDF certificate.
2. Worked Numerical Field Case Study
Scenario: Healthy VRLA Cabinet (Tcell=25.5C, Tamb=23.0C, Spread=1.2C) (NFPA 855 / IEEE 1188) — Normal temperature-compensated float operation..
- Maximum Cell Temperature:
25.5 degC - Room Ambient Temperature:
23.0 degC - Cell-to-Cell Temperature Spread:
1.2 degC - Float Voltage Deviation:
0.4 % - Highest Cell Internal Resistance:
4.2 mOhm - Baseline Internal Resistance:
3.9 mOhm - Float Charge Current:
0.18 A - Baseline Float Charge Current:
0.15 A
3. Engineering Troubleshooting: Corrective Actions When a Reading Fails
- Immediately isolate any battery string exhibiting simultaneous Delta-T > 5 degC over ambient and float current > 1.5x baseline.
- Replace individual monoblocks whose internal ohmic resistance has risen > 50% above baseline (shorted/drying cells).
- Verify temperature-compensation probe placement on the negative pilot cell and calibrate H2 gas extraction fan boost interlocks.
→ Try This Worked Example Live in Module #20 (Battery Thermal / BMS Audit)