16
Lib
er
at
ors
Operation
VIII
Liquid Level Measurement
As noted in the Theory of Operation (Section 6), Generation 4
Liberators are equipped with new liquid level meters. In order to
obtain a liquid level reading, the technician or end-user should de-
press the green operate button on the face of the meter (note that the
button has been moved onto the meter from its previous position).
This will cause the LEDs to quickly flash from right to left around
the meter’s perimeter to indicate button activation. The LEDs will
then light from the left to the right, signifying the liquid level in the
cylinder (1 LED for empty, 8 for full). If you feel the meter is giving
incorrect measurements, reference RP7 to calibrate the meter.
Cleaning and Disinfection
To insure proper functioning and end-user safety, all Liberator
units should be cleaned whenever dirt or grime is visually apparant.
The unit should be disenfected according to any applicable local
regulations or the home healthcare distributor’s own decontamina-
tion schedule.
Preparation
Prior to cleaning or disinfection, the unit should be completely
purged of LOX. The technician should wear appropriate safety gear
and prepare mild solutions of glass cleaner and disinfectant respec-
tively. If at any time either solution becomes visibly dirty or cloudy,
it should be switched out for fresh solution.
Cleaning
1. Inspect through air holes in shroud to see if any debris has ac-
cumulated beneath shroud. If it has, remove debris using long
tongs or tweezers.
2. Wipe off the exterior of the unit with the cleaning solution us-
ing a lint-free cloth. The cloth should be damp but not drip-
ping. Be as thorough as possible.
3. Discard the cleaning cloth.
4. Wipe off excess cleaning solution and dry thoroughly with a
lint-free cloth. Discard the cloth.
Disinfection
Disinfection should be performed in accordance with the home
healthcare provider’s own validated procedures and/or in accord-
ance with local regulations.
Table 1 shows actual material content of the Liberator base unit to
assist the home healthcare distributor in establishing its own disin-
fection protocol.
Table 2 lists a selection of common disinfectant chemicals and their
compatibility with Liberator base units.
TABLE 1:
Liberator Material Content
Part
Material
Shroud
Polycarbonate
Breathing Coil
T3003 Aluminum
Vaporizer Coil
T3003 Aluminum
Dewar
Stainless Steel
Valves
T6061 Aluminum
TABLE 2:
Common Disinfectant Chemicals
Disinfectant Agent
Compatible with Generation 4
Liberators
Aldehyde
Yes
Quanternary Ammonium
Compound
Yes
Sauerstoffabspalter
No
Alcohol
*Yes - Ethanol based cleaner
(only when all O2 has been
purged)
Amine Derivatives
Yes
Phenol
Yes
pH: Basic (alkaline) Cleaners
Yes
Ether/Ester based products
No
End of Life
At the end of the unit’s service life, all Liberator units must be re-
turned to a recycling facility in compliance with the Waste Electrical
and Electronic Equipment Directive (WEEE), or other applicable
codes and regulations.
Liberators Technical Service Manual • PN 13350704 Rev
K
NOTE:
Only use disinfectants or cleaning agents approved for
use with this equipment by CAIRE such as Sporicidin,
Hydroklean, or others as specified by CAIRE.
