COSC Mechanical Test Program Lookup

Look up a published component of the historic ISO 3159-based COSC mechanical chronometer movement test program.

Description

Chronometer movement tests use a defined program of positions, temperatures and rate criteria.

Chronometer movement tests use a defined program of positions, temperatures and rate criteria. A workshop observation is distinct from passing that entire program.^[1]

Look up a published component of the historic ISO 3159-based COSC mechanical chronometer movement test program.

When to use COSC Mechanical Test Program Lookup

Use this tool to look up a published component of the historic ISO 3159-based COSC mechanical chronometer movement test program.

Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.

How to use COSC Mechanical Test Program Lookup and understand its results

Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.
Enter programFocus using the field table and calculation rules, then run the tool.
Read keyDate, programFocus, verifiedStatement. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
programFocus	COSC mechanical test-program focus	string; one of "standard", "movementScope", "duration", "positions", "temperatures", "meanRateWindow"	Required

Select an exact supported programFocus value from the field table and run the lookup. The implementation selects a fixed local table entry and returns the fields shown below. Matching is case-sensitive, with no trimming, synonyms or free-text search. Any keyDate output can be a date, period or context label.

result=stored entry for selected focus

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
keyDate	Key standard, duration, or category	string
programFocus	COSC mechanical test-program focus	string
verifiedStatement	Published COSC program statement	string

json

{
  "input": {
    "programFocus": "standard"
  },
  "output": {
    "keyDate": "ISO 3159",
    "programFocus": "standard",
    "verifiedStatement": "COSC bases mechanical wristwatch chronometer certification on ISO 3159, which applies to a watch with a balance-spring oscillator."
  }
}

Limitations and assumptions

The lookup describes the stored historic ISO 3159-based COSC program; it does not certify a movement or check a live certificate. No sources are fetched or statements updated at runtime.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use ISO 6425 Diving Time Indicator Lookup: Return the current ISO 6425 scope, one-minute resolution, five-minute marking, handling-protection, or unidirectional-bezel design context. For a complementary task, use Daily Rate Average Comparison: Compare an unweighted arithmetic mean of daily rates with a duration-weighted mean for explicitly supplied measurement intervals.

References

COSC Mechanical Test Program Lookup — tool.io

Similar or alternative tools

ISO 6425 Diving Time Indicator Lookup
Return the current ISO 6425 scope, one-minute resolution, five-minute marking, handling-protection, or unidirectional-bezel design context.
Daily Rate Average Comparison
Compare an unweighted arithmetic mean of daily rates with a duration-weighted mean for explicitly supplied measurement intervals.