indicator diagram

British  

noun

1. a graphical or other representation of the cyclic variations of pressure and volume within the cylinder of a reciprocating engine obtained by using an indicator

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Example Sentences

One form of the instrument is intended for the measurement of areas of surfaces, and the other form for the measurement of the mean height of a figure such as an indicator diagram.

From Scientific American Supplement, No. 1082, September 26, 1896 by Various

In this case an approximation may be made from an indicator diagram which represents the average operation of the engine during the test.

From Steam Engines Machinery's Reference Series, Number 70 by Anonymous

The method of the indicator diagram has since proved of great utility in physics in studying the properties of gases and vapours.

From Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" by Various

The actual computation of the steam consumption from an indicator diagram is best shown by a practical illustration.

From Steam Engines Machinery's Reference Series, Number 70 by Anonymous

If the engine is to be non-condensing, the theoretical work, or indicator diagram, as it is called, will be bounded by the lines ABCHG.

From Steam Engines Machinery's Reference Series, Number 70 by Anonymous