A-A-54444
pressure transducer calibration. The digital readout shall be designed to activate at any time and incorporate a battery power saver which shall self-blank after approximately 3-seconds.
All controls, having a capability to activate the digital display shall have visual indicators which indicate the control function or airway condition being displayed. The indicator shall remain illuminated until the digital display self-blanks.
The unit shall have a visual indicator which illuminates when sigh control is activated.
A visual indicator which illuminates when the synchronized assist or synchronized intermittent mandatory ventilation modes are activated shall be provided.
Additional indicators which denote the presence of operating power and/or connection to live external power sources shall be provided.
The ventilator shall contain a pleurality or alarm circuits. Alarms shall provide both audible and visual indications. For operator convenience and safety, certain alarms shall incorporate audible muting, automatic reset, automatic reactivation and mute overrides as described. Alarms such as CPU failure, inverse I:E and pressure transducer calibration shall be mutable.
A new alarm occurrence shall override any pre-existing mute condition(s). Each of these alarms shall automatically reset when the alarm condition no longer exists and reactivate should the condition present itself again.
The unit shall have as a minimum, alarms which monitor the internal battery, external power, high and low airway pressure conditions, disconnect, apnea, PEEP, CPU failure, inverse I:E ratio and pressure transducer calibration.
The apparatus shall have a battery alarm that will activate when conditions indicative of low battery charge or shorted battery are sensed. The ventilator apparatus shall be operable from external power regardless of battery charge status. Battery alarm conditions shall be capable of being audibly muted for 5-minute periods.
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