(b)(4).The srt found the ccm read 29.2% at a setpoint of 21%.The srt installed a new o2 sensor.The product surveillance technician (pst) confirmed the o2 sensor was defective.The o2 sensor was installed in a lab use ony epgs and the electronic patient gas system (epgs) was connected to a system 1 simulator and ccm.The pst connected the epgs to oxygen and air, entered a perfusion screen on the ccm and waited the 15 minute warmup period.After the 15 minute warmup period, calibration of the epgs was initiated and passed.The pst tested the accuracy of the o2% output compared to the setpoint and the external analyzer reading was out of specification as compared to the o2% setpoint at multiple set points between 40% - 100%.Specifications for oxygen analyzer accuracy: +/- 3% of o2 set point at calibration flow and pressure.The measurement of the dc output voltage from the o2 sensor at 5 l/min and 100% o2 was 2.15 volts which is within the specification of.55-2.758 volts.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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