Build a clear event record when the density trend changes. Connect the SDM ECO reading to the circuit and the operator’s next check.
A density change in a mineral-processing circuit needs context before anyone decides to add water, adjust a pump or change a target. Rhosonics lists SDM ECO for mineral slurry measurement, including grinding, flotation and thickening duties. The reading describes the material at its measurement point; it does not explain every change elsewhere in the circuit.
This PMA application provides a practical event record for an unexpected trend. Use it to organise the evidence for a joint operations and instrumentation review, rather than starting with a calibration adjustment. The aim is to establish what changed, where it changed and which observation would test the suspected cause.
Choose one named line and one event. A cyclone-feed event, for example, needs its own timeline even when another density meter is fitted on mill feed.
Record conditions before, during and after the change using the same clock. Keep observations separate from assumptions so the next shift can follow the investigation.
Write down the line tag, start and end time, normal reading and observed reading, including units. Mark whether the event followed a feed change, water addition, pump restart or a change in active equipment.
State the question being investigated: a sustained composition change, a short disturbance or disagreement with a reference. Keep other measurement points identified separately.
Save the relevant density trend with pump state, pressure and flow where available. Add the actual timing of operator actions and any observed air, flushing or interruption of representative slurry contact.
For classification duties, include the cyclone configuration and the available overflow or underflow observations. A stable density alone does not establish satisfactory separation.
Create a short list of possible causes and an observation that would distinguish each one. A recorded dilution event can be checked against valve timing; a material change needs feed records or samples.
Note missing evidence explicitly. Avoid treating the latest operator action as the cause simply because it happened nearby in time.
Agree the next check with the responsible team and record who will perform it. Change one relevant condition at a time where the operating procedure permits, retaining the original trend and configuration.
Record the expected observation before the check and the actual outcome afterwards. This leaves a reusable investigation rather than an unexplained adjustment.
The investigation should finish with a supported action or a clearly stated unresolved question. Keep site operating limits and independent protections in force.
If the evidence supports a real stream change, route the response through the plant’s operating procedure. If it suggests a measurement issue, retain the evidence for an installation, reference or configuration review before changing calibration.
Record the accepted explanation, evidence used, action taken and the condition that would reopen the investigation. If the cause remains uncertain, state which further observation is needed and who owns it.
Send the event timeline, circuit sketch, relevant trends, measurement-point details and available reference results. PMA can review the measurement evidence alongside the slurry, installation and instrument configuration.
This event-record approach adds an operational handover to the broader mineral-processing guidance. Product suitability and installation still need a review of the actual duty.
Review SDM ECO for the proposed slurry measurement point and discuss the appropriate mounting and outputs.
Use the specialist application library for the wider circuit context and the current manufacturer information for the measurement system.
Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.
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