Mindray V60, Operator'S Manual

Page: 78 / 90

11-10
11.8 Influence of Running Time
Evaporation of the anesthetic agent during operation cools the vaporizer slowly. The saturation
concentration of the anesthetic agent in the vaporizer decreases more rapidly the longer the duration of
operation, the higher the concentration set and the higher the fresh gas flow selected, i.e. when more
anesthetic agent evaporates with time.
Temperature compensation counters this effectively and limits deviations in the concentration
delivered. After a certain period of operation, the vaporizer stabilizes at a slightly lower temperature
and an output concentration which is a slight deviation from the set value.
The accuracy given in
A Product Specifications
applies as long as the temperature of the vaporizer
does not fall outside the operating range.
The diagrams show typical concentration curves over 4 hours and 6 hours of running time respectively,
measured at 22
℃ and 101.3 kPa.
A. Fresh gas flow of 4 L/min, concentration set of 1%, running time of 4 hours.
B. Fresh gas flow of 10 L/min, concentration set of 1%, running time of 6 hours.
C. Fresh gas flow of 4 L/min, concentration set of 3%, running time of 6 hours.
D. Fresh gas flow of 4 L/min, concentration set of 6%, running time of 4 hours;
E. Fresh gas flow of 1 L/min, concentration set of 6%, running time of 6 hours.
F. Fresh gas flow of 4 L/min, concentration set of 5%, running time of 4 hours.
G. Fresh gas flow of 1 L/min, concentration set of 5%, running time of 6 hours.