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Trend charts
Above a machine’s check table, each tracked parameter gets its own small chart of readings over time — Concentration and Brix always, pH too if the machine has ever recorded one.
Why separate charts, not one combined chart
Brix, concentration, and pH sit on very different scales — plotting all three on one axis flattens the smaller ones into a straight line. Each gets its own chart so its real variation stays visible.
The band is always shown
A shaded reference for the machine’s acceptable range stays in frame even when every reading sits comfortably inside it — the point is to see the trend relative to spec, not just the raw numbers. Out-of-range points are marked clearly (larger, ringed), never by color alone.
Hovering a point
Shows that reading’s exact value and date — the same values are in the check table below as text, so the chart is a way to spot a trend quickly, not the only place the numbers live.