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Companion 1000/T Liquid Oxygen System Technical Manual
3.3.3
3.4
LIQUID OXYGEN TESTS
3.4.1
3.4.2
B-701964-00 Rev. C
Vent Valve Test
When open, the vent valve creates a vent path to atmosphere from the Companion
1000/T container. This is required to commence filling. The vent valve must be leak-free
when closed and it must allow an adequate flow of gas when open.
Refer to Figures 6-1, 6-2 and 6-7 for identification of parts with bold number
references.
PROCEDURE
1. Perform steps 1 through 3 of the Leakage Test (Section 3.2.1).
2. Open the vent valve 7 and listen for a sudden exhaust of gaseous oxygen.
Conduct the following tests on units that contain liquid oxygen.
Contents Indicator Test
The contents indicator is a mechanical weight scale device that provides an approximate
indication of the level of liquid oxygen in the Companion 1000/T inner container.
Activate the contents indicator by holding the unit by the end of the carrying strap
nearest the indicator.
Refer to Figure 6-3 to identify parts with bold number references.
PROCEDURE
Disconnect the plastic buckle in the carrying strap before performing the
following steps. The Companion 1000/T side covers must be in place when
performing this test.
1. Place the Companion 1000/T Portable on a table and hold it down while gently
pulling up on the end of the carrying strap nearest the contents indicator. Verify that
the indicator operates smoothly and without binding. Companion T - verify
"Transport" is present on the indicator dial.
2. Suspend the unit by the end of the carrying strap nearest the contents indicator 2.
Verify that the needle appears in the red EMPTY region at the end of the indicator
window.
3. Fill the unit with liquid oxygen. Suspend the unit by the end of the carrying strap
nearest the contents indicator. Verify that the needle is in the upper portion of the
green FULL region.
If the unit does not pass the Contents Indicator Test, refer to Section 5.5, Service
and Repair.
Flow Control Test
The flow control valve on the Companion 1000/T is an adjustable, rotary, indexed valve
that controls the delivery rate of gaseous oxygen from the Portable to the patient. The
valve flow settings are calibrated at an inlet pressure of 22 psig (152 kPa). This test
determines the acceptable flow ranges for the flow control valve.
Performance Verification 3-5
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