Main and sub-meters must reconcile
Variance beyond tolerance creates a controlled consumption conflict that the collector cannot close alone and that can trigger calibration or maintenance.
Meter rounds, tank levels, main-to-sub-meter reconciliation, calibration, carbon factors, water testing, and a printable quality logbook share one controlled evidence chain.
Built from the approved module specification as a representative system view. Final production screens may differ.
Variance beyond tolerance creates a controlled consumption conflict that the collector cannot close alone and that can trigger calibration or maintenance.
Sampling points use QR confirmation, control limits are versioned, out-of-range results require action, and the complete history prints as a Water Quality Logbook.
Every calculation stores its activity quantity, conversion, approved factor, factor version, scope, and boundary. Missing evidence marks readiness rather than inventing certainty.
Scan the exact meter or sampling-point QR.
Record reading, photo, sample, or approved bypass.
Compare hierarchy, tank movement, refill, and tolerance.
Raise conflict, calibration, retest, or maintenance evidence.