Post-Fill Inspection; Checking Saturation Pressure - Puritan Bennett Tyco HELIOS Reservoir Technical Manual

2-14 - Reservoir General Information
2.5.5

Post-Fill Inspection

Perform the following procedure to inspect the Reservoir and determine its operational
status after filling it with liquid oxygen. Correct observed problems before placing the unit
in service. Refer to Sections 4 and 6 as needed to correct problems.
1. Verify that the Reservoir fill connector poppet is closed and not leaking.
2. Verify that the vent valve is completely closed and not leaking.
3. Verify that the Reservoir pressure is at least 22 psig (152 kPa) within five minutes after
terminating the fill.
4. Verify that there is no frost or heavy condensation on the container below the
shroud.
5. Verify that all green LEDs light when the contents indicator button is depressed.
6. UNIVERSAL RESERVOIR
outlet DISS connector.
2.5.6

Checking Saturation Pressure

Perform the following procedure to determine the saturation pressure of the liquid oxygen
in a Reservoir unit. A Reservoir pressure reading may not always be a true indication of
the liquid oxygen saturation pressure.
1. STANDARD RESERVOIR
pressure gauge.
UNIVERSAL RESERVOIR
equivalent) to the Reservoir oxygen outlet DISS connector. Note the pressure
indicated on the pressure gauge.
2. Momentarily open the vent valve on the Reservoir and observe the pressure gauge
pointer as it drops.
3. Note the pressure value where the gauge pointer hovers (Figure 2-8) and then close
the vent valve. This is the approximate saturation pressure of the Reservoir. Satura-
tion pressure readings between 24 and 48 psig (166 and 331 kPa) for the Standard
Reservoir and between 20 and 28 psig (138 and 193 kPa) for the Universal Reservoir
are in the acceptable pressure range of the unit.
Figure 2-8: Indicator Needle "Hovering"
HELiOS Liquid Oxygen System Technical Manual
Disconnect the pressure gauge from the Reservoir oxygen
Note the pressure indicated on the Reservoir internal
Attach an external pressure gauge (P/N B-701732-00 or
B-701693-00 Rev. C