Thermal Death Point Record Entry Checker

Record lowest tested no-detection temperature at actual fixed hold under valid controls; detection limit/censoring not proof of all-cell death.

Description

Thermal Death Point Record Entry Checker: return all controls valid, observed first no detection temperature c, no detection observed, actual sterility established.

A thermal death-point record compares detection results across tested temperatures at a fixed hold time. The tested temperatures bound what was actually observed.

This tool returns all controls valid, observed first no detection temperature c, no detection observed, actual sterility established. Use the stated units and model convention when interpreting these fields.

When to use this tool

Use this tool when the supplied inputs match the specific operation described above and you need a repeatable result under its stated convention.

Check the supported input and output contract against an existing calculation or observation.
Use the complete example to confirm units, selector spelling and result interpretation.

How to use the tool and how it works

Enter every field in the input table using the stated units and the exact supported selector spelling where applicable.
Run the tool. Correct input errors before interpreting an output.
Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.

Require increasing temperatures, a positive hold time and matching binary detection flags that never return to one after zero. If controls are valid, report the first temperature with no detection.^[1]

Input field	Meaning and units	Accepted input
testedTemperaturesC	Tested temperatures c.	List of finite numbers
viableDetectedFlags	Viable detected flags.	List of finite numbers
holdMinutes	Hold minutes. Minutes.	Finite number; greater than zero
callerControlsValid	Whether the caller has independently established that the supplied control observations are valid.	true or false

Output field	Interpretation
result	Object containing the following named result fields.
result.allControlsValid	All controls valid flag under the exact conditions described above.
result.observedFirstNoDetectionTemperatureC	First qualifying temperature; zero is a placeholder when noDetectionObserved is false.
result.noDetectionObserved	True only when controls are valid and an explicit zero detection flag was supplied.
result.actualSterilityEstablished	Always false; a recorded lack of detection does not establish actual sterility.

json

{
  "input": {
    "testedTemperaturesC": [
      60,
      70,
      80
    ],
    "viableDetectedFlags": [
      1,
      0,
      0
    ],
    "holdMinutes": 10,
    "callerControlsValid": true
  },
  "output": {
    "result": {
      "allControlsValid": true,
      "observedFirstNoDetectionTemperatureC": 70,
      "noDetectionObserved": true,
      "actualSterilityEstablished": false
    }
  }
}

Limitations and assumptions

Read noDetectionObserved before interpreting the numeric result. A first negative test is not proof of absolute sterility.
Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.

Alternative or Complementary methods

Check the underlying observations, units and conventions independently before using the result in a larger workflow. The tools listed below address nearby tasks; compare their inputs and scope before substituting one for this operation.

References

Tool behavior and example: Thermal Death Point Record Entry Checker — tool.io

Similar or alternative tools

Thermal Death Time TDT at Given Temp Recorder
Record first tested no-detection hold at actual fixed temperature; interval-censored endpoint, not a complete kill curve or sterilization approval.
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