Glossary
Measurement uncertainties of the calorimeter cone according to the standard ISO 5660-1

For the purposes of this document, some of the terms and definitions used in ISO 5660-1 are reproduced below.

Test tube; specimen

Representative part of the product to be tested with a possible substrate or treatment.

Intermittent flame; flashing

Presence of a flame on or above the surface of the test piece for periods of less than 1 s.

Ignition

Appearance of a persistent flame as defined below.

Flamme persistante; sustained flaming

Presence of a flame on or above the surface of the test piece for periods longer than 10 s.

Guidance; orientation

The plane in which the exposed side of the specimen is located during testing, with the vertical or horizontal side facing upwards.

Smoke obscuration; smoke obscuration

Reduction, usually expressed as a percentage, of light intensity as it passes through smoke.

Extinction...