CALIBRATION / OPERATIONAL VERIFICATION PROEDURE
5-2 SERHT50NA A0808
PRE-TEST INSPECTION
Refer to Figure 9-1.
1. General Inspection
• Inspect the patient breathing circuit, exhalation valve, and
500 cc test lung for any deterioration which may cause leaks
in the system. Replace any defective parts prior to performing
the OVP.
• Inspect the A.C. power cord for any deterioration. Replace
the power cord as necessary.
• Inspect the proximal filter. If filter housing indicates the
presence of dirt or moisture, replacement of the filter is
necessary.
WARNING DO NOT reverse filters. This practice will allow
contaminates to enter the breathing circuit or ventilator
. Dirty or
contaminated filters must always be replaced with new filters.
2. Air Inlet Filter
• Remove the Air Inlet Filter Cover (8).
• Inspect the inlet filter (11). If the filter material indicates the
presence of dirt or is discolored, replacement of the filter is
necessary.
• Before reinstalling the Inlet Filter Cover, make certain that the
filter is lying flat within the counterbore of the cover.
• Reinstall the Cover, making certain that the filter material
remains securely in place. Verify that the O-ring (9) is in its
proper place.
3. Connecting Breathing Circuit, Exhalation Valve, and Test Lung
• Connect one end of the patient tubing to the main flow outlet
labeled “GAS OUTPUT” (bypassing any humidifier) and the
other end to the exhalation valve. Connect one end of the
exhalation drive line tubing to the connector labeled “EXH.
VALVE” and the other end to the white connector on the
exhalation valve. Connect one end of the proximal pressure
tubing to the connector labeled “AIRWAY PRESSURE” (via
the proximal inline filter) and the other end to the blue
connector on the exhalation valve.
• Connect the 500 cc test lung to the exhalation valve.
NOTE: The proximal filter must remain inline for all calibrations and
tests.
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