![background image](http://html1.mh-extra.com/html/caire/companion-1000/companion-1000_technical-manual_3344005033.webp)
B-701964-00 Rev. C
Theory of Operation
2-5
Companion 1000/T Liquid Oxygen System Technical Manual
2.1.7
Contents Indicator Scale
The contents indicator scale (Figure 2-8) is a mechanical, spring-balanced helix device
that measures the liquid contents in the unit. The needle on the weight scale moves an
amount proportional to the amount of liquid in the unit. Suspending the unit from the
end of the carrying strap closest to the indicator activates the weight scale mechanism.
The contents indicators for the Companion 1000 and Companion T, although similar in
design, are different due to the different empty weight of each unit.
Figure 2-8: Contents Indicator Scale
2.2
LIQUID OXYGEN SATURATION PRINCIPLES
A saturated liquid is one that absorbs the maximum amount of heat possible at a given
pressure without vaporizing into a gas. As additional heat is added, the saturated liquid
begins to vaporize (boil) while remaining at a constant temperature until all of the liquid
is vaporized. A common example of a saturated liquid is water at its boiling point of
212°F (100°C); additional heat does not cause the water to become hotter, but instead
causes part of the liquid to turn to water vapor.
The saturation point of a liquid depends on temperature and pressure (Figure 2-9). If
the pressure in a container of saturated liquid increases, the temperature required for
saturation will also increase, leaving the liquid unsaturated, that is, capable of accepting
more heat before it will boil. If the pressure in a container of saturated liquid decreases,
the temperature required for saturation will decrease, leaving the liquid "super
saturated" or too warm. When this occurs, rapid boiling and vaporizing of some of the
liquid occurs. This process continues until the remaining liquid cools down to the new
saturation temperature associated with the new pressure.
Summary of Contents for COMPANION 1000
Page 2: ......
Page 4: ...This page intentionally left blank...
Page 73: ...2EV 6 1 Section 6 PARTS LISTS AND ILLUSTRATIONS...
Page 85: ......