High RO permeate conductivity and salt passage
First confirm that the anomaly is real and the data are comparable. Then narrow the cause using common operating conditions, spatial localization, and direct evidence. The output preserves support and counter-evidence without presenting rule weights as failure probabilities.
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Answer in the order of safety, measurement confirmation, normalization, localization, and professional evidence. The reviewed rules run locally and this page does not transmit your selections.
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Phase 0 · Safety
Is there any high-pressure spray leak, abnormal noise or vibration, chemical spill, or irritating gas?
Questions are ranked by safety phase, base priority, and the rules they can distinguish. Unknown or not-checked answers remain in the evidence-collection list.
Additional evidenceThese fields normally come from synchronized calculations, laboratory analysis, or checks performed by trained personnel under an applicable procedure.
Rule sources
Each rule cites the standards, OEM material, or peer-reviewed literature that directly supports its use. Links are provided to verify scope; the current OEM and site procedures remain controlling for a specific installation.
- A-standard · ASTM International · 2023ASTM D1125-23 — Standard Test Methods for Electrical Conductivity and Resistivity of Water
- A-standard · ASTM International · 2019ASTM D4516-19a — Standard Practice for Standardizing Reverse Osmosis Performance Data
- A-standard · ASTM International · 2023ASTM D3923-23 — Standard Practices for Detecting Leaks in Reverse Osmosis and Nanofiltration Devices
- A-oem-current · DuPont Water Solutions · 2026FilmTec Reverse Osmosis/Nanofiltration Membranes Technical Manual, Rev. 19
- A-oem · DuPont Water Solutions · 2022FilmTec Troubleshooting — High Solute Passage, Form 45-D01651-en, Rev. 10
- B-independent-oem · Hydranautics / Nitto · 2013TSB114.04 — Procedure for Pressure Vessel Probing
- B-independent-oem · Hydranautics / Nitto · 2017TSB101.03 — Bubble Testing of RO Membrane Elements
- B-independent-oem · Hydranautics / Nitto · 2019TSB118.16 — Membrane Start-up, Shutdown, and Preservative Flushing Guidelines
- B-independent-oem-current · Hydranautics / Nitto · 2026TSB122.09 — RO/NF Element Loading and Unloading Guidelines
- B-independent-oem · LG Water Solutions · 2025Technical Service Bulletin 108 — Vessel Probing
- B-independent-oem-current · LG Water Solutions · 2025Technical Service Bulletin 111 — Data Logging and Performance Normalization
- C-peer-reviewed-review · Water Research · 2021Separation, anti-fouling, and chlorine resistance of the polyamide reverse osmosis membrane