Condition Trend

The Condition Trend draws one asset's measurement, such as vibration or bearing temperature, over time against its limits. Use it to see whether a machine is getting worse and how soon it reaches its alarm limit.

• Zones. The normal, watch and alarm zones are bands behind the line, with the two limits as dashed lines.
• Marks. Every moment the value entered the watch or the alarm zone is marked on the line.
• Headline. The latest value, its zone, and a note: that the value is above the alarm limit, when it reaches the alarm limit at the current trend, or whether it is rising at all.
• Projection. While the value is rising, a dotted line extends the trend of the last days to the alarm limit.

The projection is a straight line through the recent values, labelled as such. It is not a remaining-life model and does not say when the machine will fail; it says where the trend leads if nothing changes.

With several assets in the data, the asset closest to its alarm limit is shown first and a list picks another. A dashboard filter, such as a card selected on the Asset Health Board, narrows it to one asset.

Data fields

Asset, Time and Value are all required: one row per asset and time, for example an hourly average.

Settings

• Watch limit and Alarm limit set the zones. Keep the watch limit the lower of the two.
• Unit is written after the values (for example mm/s or °C).
• Trend over the last (days) is how many days of values the projection is drawn through.

Where to see it

The Meridian demo plant uses it for vibration on Meridian · Condition Monitoring Command Center.

Related

• Asset Health Board
• Deteriorating Assets
• Proxus dashboard items