Maquet Servo ventilator 900 C, Руководство по обслуживанию

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Electronic unit – Monitoring
General
The monitoring subsystem of the Servo Ventilator
900 C/D/E is used for continuous monitoring and indi-
cation, via the front panel meters, of the pressure and flow
signals.
The expiratory flow transducer continuously meas ures
the expiratory flow. The flow is linearized and the value is
shown on the meter EXPIRED MINUTE VOLUME and on
the digital display as EXP. TIDAL VOL. ml and EXP. MIN
VOL. l/min.
The monitoring system operates independent of the
regulating systems.
On the digital display, 8 parameters can be selec ted
for direct read-out.
The values are continuously compared with preset
alarm limits, and if any of these limits is exceeded, a
corresponding visual and audible alarm is activated.
As described in the section TIMING, the timing
schedule is affected when one of the limit values UPP ER
PRESSURE EXCEEDED or PATIENT TRIG. is exceeded.
All internal voltages; and timing control signals are
monitored and an audible alarm is activated if any of
these should fail.
The audible alarms, with some exceptions, can be si-
lenced for approximately 2 minutes by means of the knob
OFF 2 MIN on the front panel. UPPER PRESS.LIMIT and
TIMING FAILURE audible alarm as well as the ini tiation of
an alarm for VOLTAGE failure can not be si lenced in this
way.