MIL-DTL-55023D
4.4 Examination. Each sample selected in accordance with 4.3.2 shall be examined for
compliance with the requirements specified in section 3 of this specification. This element of
inspection shall encompass all visual examinations and dimensional measurements.
4.5 Tests. Each sample shall be tested as specified in 4.5.1 and 4.5.2.
4.5.1 Scale accuracy. The manometer shall be tested in a room having a temperature of
80 ± 5°F. The graduated scale of type I manometers shall be checked against a standard
measuring device having an accuracy of 0.001 inch at any reading. The distances from the zero
index to each 1 inch scale graduation and the 0.1 inch graduation within each 1 inch increment
shall be checked to determine compliance with 3.7.4. The type II manometers shall be given a
comparable test.
4.5.2 Pressure test. The manometer shall be filled with water and one pressure
connection shall be plugged. The other pressure connection shall be attached to a source of air
pressure by means of 0.312 inch inside diameter air hose 10 feet in length. The pressure shall be
measured using a system with an accuracy of 0.25%. A pressure of 100 psig shall be applied for
10 minutes. During this period, no pressure drop shall be indicated on the gauge. After the test,
the manometer shall be examined to determine compliance with 3.6.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed by
DoD or in-house contractor personnel, these personnel need to contact the responsible packaging
activity to ascertain packaging requirements. Packaging requirements are maintained by the
Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM
products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful,
but is not mandatory.)
6.1 Intended use. The manometers covered by this specification are intended for use in
determining positive pressure, vacuum, pressure differentials or, when used with a pitot tube, rate
of flow. The manometers may be used as liquid level gauges and for calibration of pressure
gauges.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Types, sizes and styles or manometer required (see 1.2)
c. When table-stand mounting is required for style B (see 3.1.2.2)
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