Control systems degrade quietly. Probes drift, valves stick, PID tuning drifts out of date, and maintenance practices slip — until a consent breach or a chemical-cost blow-out exposes it. Our quarterly audits verify instrument accuracy, control-loop performance and maintenance practice, with clear recommendations that prevent gradual degradation before it costs you.
A structured check of the things that drift.
Analysers verified against grab samples and reference standards; drift, fouling and calibration practice assessed. See online analysers.
Trend review for oscillation, offset, integrator wind-up and dead-time; PID re-tuning where needed — see control.
Reagent use and £/m³ checked for over- or under-dosing drift.
Nuisance-alarm review and priority check against alarm management best practice.
PM records, spares holding and calibration logs reviewed for gaps that lead to failures.
Historian and report values traced back to source to confirm compliance data is sound.
Each audit produces a concise findings report: what was checked, what is drifting, the risk it poses (consent, cost, reliability), and prioritised, costed recommendations. We re-check previous findings each visit so improvement is tracked, not just observed.
Audits pair naturally with our aftermarket O&M support and SCADA services for closing out the actions.
Most performance loss is slow and invisible day-to-day. A scheduled audit catches the 5% drift before it becomes a 30% problem.
Book a quarterly instrument and control audit. We verify accuracy, performance and maintenance, and hand you a prioritised action plan that protects compliance and chemical cost.
Our expertise spans multiple industries with sector-specific water treatment solutions.