Figure 2-26. Oxidation Stability Bath

stalled) device used to provide a continuous record of

(d) Rotate the chart hub until the proper time arc

test results obtained form the bombs used in the

is indicated by the time set pointer.

oxidation stability bath. The range is from zero to 200

poungs (90.8 kg/sq cm) pressure per square inch, with

NOTE

an accuracy rating of 0.5 percent of full scale. One

The time set pointer and the pen

complete revolution around the circular chart is

point register on the same time arc.

equivalent to 24 hours.

(e) Close and latch the gage door; the pen lifter

b. Operation.

is automatically lowered to place the pens on the chart.

(1) Changing Chart.

(2) Inking pens.

(a) Open the gage door (fig. 2-27) and raise the

(a) Put a small drop of ink in the pen, at the tip,

pen lifter.

and wet the tip with ink.

(b) Touch the pen to the chart; if light pressure

(b) Pull outward on the chart hub; it will collapse

does not start the flow of ink, draw a moistened finger or

into itself, leaving the chart free to be removed.

piece of paper across the tip.

(c) Insert a new chart. Push in on the chart hub

(c) After starting, add no more ink than is

to engage the chart.

considered necessary for the test.

2-47