A: That is a great question with a complex answer. To measure the output of the LFPS2 you need specialized test equipment that measures different values. Do you think your FFPS2 is not working correctly?
A: Simple answer, you can’t. And since you can only get it at the tech school, your best bet is to contract with the manufacturer or a third party to do the PM for you unless you can get into the school.
A: You need to be trained to correctly PM the unit. iMed offers a training course and fully supports you afterwards with tech support and repair parts. If you have the background, you can call tech support for assistance.
A: The calibration is done automatically during the pre-use check. If you need to do any further calibration a field service card is required to access the service menu. If your Servo-i is failing it’s pre-use check on pressure transducers I would suggest trying with another expiratory cassette at first and then removing and cleaning the inspiratory valve.
A: Are you getting an error called “Pressure Transducer difference > 5 cm H2O” or the pressure transducer test failed? If you are, then one transducer is substantially different than the other. Either a connection is loose or you may have to replace one of the transducers. But there is no calibration, per se, on them. They are calibrated each use during the pre-test.
A: You also need to replace the PVC filter, clean the inline screens and the water line screens on tubes entering the bottom left, clean the probe compartment and clean and flush the separate disinfectant tank (twice per year).
A: The system interprets pressure via a current feedback loop. The circuitry is located on the PDCi board in the main box.
A: The system is designed to maintain flow rate and volume to the values as set. The pressure limit on the other hand is looked at as a “not to exceed.” In that, the pressure reading should never really near the pressure value as set. It should only near the pressure value as set during an occlusion event or if the flow rate is set too high for the relative tubing diameter. In such an event, the flow rate will then decrease as to not exceed the pressure limit parameter – all the way up to a stall condition should a complete blockage occur.
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