TERMIUM Plus®

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MESURE PONCTUELLE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1993-09-24

English

Subject field(s)
  • Photography
DEF

Measuring an exposure through a spot meter.

OBS

spot meter: Reflected-light exposure meter which enables the brightness of small areas of the subject subtending an angle of not more than 2[degrees] to be measured.

French

Domaine(s)
  • Photographie
DEF

Mesure du sujet effectuée avec un posemètre spécial, dont l'angle de mesure est particulièrement étroit.

CONT

La mesure spot permet de mesurer les parties importantes du motif sans prendre en compte les zones de l'image de luminosité très différente qui pourraient éventuellement avoir un effet gênant. Ce type de mesure est utilisé en particulier pour réaliser des contre-jours où la mesure intégrale donne toujours des résultats erronés (...)

Spanish

Save record 1

Record 2 1985-10-21

English

Subject field(s)
  • Measuring Instruments
  • Heating
CONT

Burner Efficiency Tests and Adjustments ... A smoke spot tester is used to measure the soot content of flues gases. The serviceman will adjust the air intake band on the burner until a visually smokeless flame is produced in the combustion chamber. The probe of the smoke testing apparatus is inserted through the hole in the flue pipe and a flue gas sample is drawn through a piece of filter paper. The resulting soot mark on the paper is compared in intensity to a standard chart. The chart shows measurements labelled 0 to 9 and most residential oil furnaces can burn cleanly enough for a 0 to 1 rating ... a number 2 smoke is ideal.

French

Domaine(s)
  • Appareils de mesure
  • Chauffage

Spanish

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