Test Window & Delta Checkpoints on the Chart

After import, the pressure chart is the centre of your hold-test analysis. The orange band is your test window—drop %, pass/fail, and delta checkpoints are calculated only inside that window.

Nominal test pressure, criteria %, and checkpoint count are set in the test controls beside the chart.

• Drag the orange window horizontally to move it along the trace.
• Drag vertically on the window to calibrate how the curve sits against your nominal pressure.
• Double-click the blue trace before the orange segment to set test start; double-click after it to set test end (duration stays fixed).
• Use toolbar controls to set min/max pressure on the Y axis, or scroll on the chart to zoom (Shift + scroll for vertical zoom only).

Choose 2–8 checkpoints. PressureTrend splits the window into equal time steps and shows |Δ| between steps on the result card.

• More checkpoints reveal whether drop accelerates late in the hold (red deltas on falling holds can fail the test).
• Fewer checkpoints suit short holds or stable traces.
• Checkpoint count can be saved in session defaults for your next import.

Timeline nudge moves the whole window in fixed steps (1–5 steps per direction, configurable globally or per test). Use it to align the window with procedure-defined hold start without re-clicking the trace.

When allow below test pressure is off, any sample below nominal pressure inside the window fails the test independently of drop %.

You can queue multiple logger files per session. Each test keeps its own window, criteria, and report fields—switch tests from the header without losing settings.