Hold-Test Drop %, Criteria & Pass/Fail

You define the hold period by selecting start and end on the pressure chart. All change and delta calculations use samples inside that window.

• Falling hold (↓): pass when drop ≤ criteria %.
• Rising hold (↑): pass when rise ≤ criteria %.
• Stable hold (—): pass when |change| ≤ criteria %.
• Optional: pressure must stay at or above nominal test pressure for the full window when that check is enabled.
• On falling holds—and stable holds with a net loss—red delta checkpoints can fail the test; on rising holds they are advisory.

↑ means net pressure rose during the window; ↓ means it fell; — means the change was very small relative to start pressure.

A warming system often produces a rising hold—the app shows rise % instead of a misleading negative drop %.

• Green: this step’s |Δ| is not steeper than the previous step.
• Red: the interval change grew compared with the step before.
• On ↓ holds, and — holds with a net loss, a red delta can contribute to Not passed.

When the logger exports temperature, review the trace beside the chart. Cooling can look like a leak; warming can explain a rising hold.

Optional temperature-adjusted drop affects pass/fail only if you enable it and your procedure allows it.

PressureTrend helps you read a hold test; your written procedure, client specification, and code rules govern sign-off when they differ from the app.