Destination: WO Note State: approved

calibration drift on DO probe aeration basin 2 - governed #8

Problem: calibration drift on DO probe aeration basin 2 observed on SCADA and Instrumentation Network. Observed fix: checked unit, replaced worn parts, tested 2h, no repeat alarms. Verification: restart complete with stable operating readings and no immediate recurrence. Follow-up: log parts used and monitor on next operator round.

Asset: SCADA and Instrumentation Network | By: Priya Ramasubramanian | Approved: Emily Vasquez (2026-04-22)

Evidence Provenance

Confidence: medium — expert Luis Moreno is 3.6x faster, handles 75% of cases

Detection basis: Luis Moreno resolves in 41min vs 148min for others (20 total occurrences)

Source type: technician contributed via sms (AI-structured, reviewer-approved)

Contributor: Priya Ramasubramanian · Reviewer: Emily Vasquez · Approval date: 2026-04-22

Confidence level: medium

Sovel attribution: Governed knowledge artifact (entry ENT-ed47943339f9)

Placement Tracking

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