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Function Description
The injection valve (9 and 8) injects a defined quantity of liquid anaesthetic
into the evaporator chamber (7) as specified. In the evaporator chamber (7)
the liquid anaesthetic is converted into saturated vapour (100% anaesthetic).
The evaporator chamber heater (68) is regulated by way of the temperature
sensor (69).
The DIVA embodies a sophisticated safety concept. The DUMA anaesthetic
flow sensor (6) positioned upstream of the metering module outlet monitors
conformance to the specified values. To prevent condensation collecting in
the DUMA anaesthetic flow sensor (6), the DUMA (6) is heated by the heater
(85). The heater is regulated by way of the temperature sensor (83).
If the DUMA anaesthetic flow sensor (6) measures values higher than stipu-
lated, the supply module diverts the metered anaesthetic vapour into the
anaesthetic gas scavenging system. As a result no more anaesthetic enters
the ventilation circuit.
Independently of the DUMA anaesthetic flow sensor (6), the SGA also moni-
tors conformance to the specified values, and cuts the supply of anaesthetic
into the breathing system if the values are too high.
The PGA measures the actual values independently of the specified values
and compares them against the pre-set alarm limits. In the event of non-con-
formance an alarm is generated and a user response is prompted.
5.3.1
Metering Module PCB
The Metering Module PCB is located in the DIVA metering module.
The functions of the Metering Module PCB are:
–
To control the valves in the metering module
–
To control the heaters in the metering module
–
To measure the anaesthetic flow
–
Various monitoring functions
The core of the Metering Module PCB is the microcontroller ST10F168. Only
the internal RAM and ROM of the microcontroller are used (
Figure 18
).
Содержание Zeus
Страница 1: ...5133 001 9036190 Revision 3 0 Because you care Technical Documentation Zeus Anesthetic workstation ...
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Страница 8: ...All rights reserved Copyright reserved K5133001IECIVZ fm 03 05 06 VI Contents ...
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