dive-math / ccr / classifyO2Cell

Function: classifyO2Cell()

classifyO2Cell(input): O2CellVerdict | null

Defined in: ccr/o2-cells.ts:76

Classify an O₂ cell from its ambient-air and pure-O₂ millivolt readings.

Ambient handling:

• Manufacturer spec (10-14 Aii, 9-14 AST) is a hard UPPER limit — above ceiling is an automatic FAIL.
• Below the manufacturer floor is NOT an automatic fail — it's a caution flag on the ambient reading itself (ambientFlag: "low"), while the PASS/QUALIFIED/FAIL verdict still comes from the ratio-to-100%-O2 math, same as any other reading.
• 8 mV is an absolute floor regardless of the ratio.

Parameters

input

ambientMv

number

brand

O2Brand

o2Mv

number

Returns

O2CellVerdict | null

The verdict, or null when the ratio test does not apply (Greenflash).

Throws

If either reading is negative or not finite, or brand is not in O2_SENSOR_BRANDS.

Example

classifyO2Cell({ brand: 'Aii', ambientMv: 11, o2Mv: 52.58 })?.status // 'PASS'