(b)(4).During routine testing at service center the service repair technician (srt) found that the electronic patient gas system (epgs) failed oxygen (o2) sensor accuracy tests at 21% and 30% with a new oxygen sensor installed.Testing at 21% test, the set-point on the ccm was 21%.Ccm read oxygen was at 24% and oxygen analyzer read 20.9%.Testing at 30% test, the set-point on the ccm was 30%.Ccm read oxygen was at 30.8%, oxygen analyzer read oxygen was at 27.7%.The srt replaced the oxygen sensor with another new oxygen sensor.The reported complaint was not duplicated as per laboratory evaluation.The oxygen sensor was tested and passed calibration.The measurement of the dc output voltage from the o2 sensor at 5 l/min and 100% o2 was 1.64 volts which is within the specification of.55-2.758 volts.The operated epgs through its range of oxygen percentages and measured the o2% output on the ccm and with an external oxygen analyzer.No inaccuracies were found.The unit meets specification.If additional information becomes available on this complaint that would alter the facts and/or conclusion, a supplemental report will be filed accordingly.
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