Tool · metrology

Temperature fixed-point reference

A discovered physical requirement. Its caller-specific capability and making inventory remain open.

Discovered · unresearchedClosure: OpenInventory incomplete

Capability requirements and tolerances

Consumer-specific numerical targets, quantities and acceptance limits remain open or incompletely reviewed. No smartphone-grade suitability is claimed. Distinct capability tiers require their own making route and qualification.

Making steps · draft selected for navigation; not a validated fabrication specification.

Known Parts and Tools

The selected route supplies this page's inventory and the map's dependency links from one record. Further requirements may be missing; review flags do not prove physical suitability.

Requirement	Role	Use	Relationship status
Chemical test independent phase-transition reference charge	Part	incorporated and consumed trial/wear allocation	Cycle-checked; compatibility unknown
Chemical test selected dense mineral cell blanks	Part	incorporated and consumed trial/wear allocation	Cycle-checked; compatibility unknown
First pit firing bed	Tool	reused making/operation	Cycle-checked; compatibility unknown
Wood or charcoal fuel	Part	incorporated and consumed trial/wear allocation	Cycle-checked; compatibility unknown
Ambient firing air charge	Part	incorporated and consumed trial/wear allocation	Cycle-checked; compatibility unknown
Hand-drill ignition kit	Tool	reused making/operation	Cycle-checked; compatibility unknown
Hot handling kit	Tool	reused making/operation	Cycle-checked; compatibility unknown
Collected wood	Part	incorporated and consumed trial/wear allocation	Cycle-checked; compatibility unknown
Stone hand tools	Tool	reused making/operation	Cycle-checked; compatibility unknown
Time comparison reference	Tool	verification	Cycle-checked; compatibility unknown

Making outline

Prepare separately retained phase-transition references in lidded mineral sample wells with cold viewing/transfer marks, observe independent heating/cooling plateaus against phase morphology; purity, pressure and high-temperature reference coverage unresolved
Detailed procedure and acceptance remain unresearched.

What remains unresolved

Full inventory, required quantities, process settings, numerical demand and suitability remain open.
Current memory-first method needs source and compatibility review.

Proposed capability specification

{
  "reference_origin": "Physical material transition cell with independently established composition/pressure/phase and uncertainty; thermometer under test cannot define fixed point.",
  "uncertainty": "not yet specified",
  "stability": "not yet specified",
  "realization_method": "not yet specified",
  "transfer_method": "not yet specified",
  "unit_relationship": "not yet specified"
}

Earlier research provenance

proposals/2026-10-08-discovery/electronics/frontier-report.md

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Used by

Items that directly require this item in their selected inventory.

Paths from Smartphone

These routes together include every item that can lead from Smartphone to this item. Repeated path combinations are collapsed; recipes are omitted.

Shortest route: Smartphone → Covers → Temperature instruments → Temperature fixed-point reference

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