AM852 Veterinary Anaesthesia machine User’ Manual
14
pressure fluctuation at the fresh gas outlet of (5 ± 0,4) kPa.
For an anaesthetic system in which the fresh gas flowrate is determined by the
ventilator settings, set these to give a minute volume of (8 ± 0,8) l.
Vapour output during and after oxygen flush
* When the AVDD is tested as described in Determination of delivered vapour output
during and after oxygen flush , the output of anaesthetic vapour shall not increase by
more than 20 %.
Determination of delivered vapour output during and after oxygen flush
1. Follow the test procedure in.6. Instead of introducing a pressure fluctuation at the fresh
gas outlet, measure the output of anaesthetic vapour (concentration of vapour × volume
of gas) for 1 min before, during a 10s activation of the oxygen flush, and for 30s after
the oxygen flush activation.
Compare these three measurements, expressed as volume flowrate (volume of vapour
Note: The volume of gas can be determined for example, by integrating flow or by collecting
the gas during the specified period.
2. Repeat the test procedure in 1. using a steady sub-atmospheric pressure of 10 kPa.
Compare these three measurements, expressed as volume flowrate (volume of vapour
Warning: The evaporator isn’t adjusted in the range from 0 to the first scale, so this
Warning: An ANAESTHETIC VAPOUR DELIVERY DEVICE used with the ANAESTHETIC SYSTEM
shall comply with ISO 8835-4.
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