Harvard
Apparatus V
entilator Model 613 User's Manual
7
Dual Phase Rate Compensation Chart
Note: Actual I/E ration range is 25/75 to 50/50.
The graph above, taken from tests on a Harvard Model 613 Ventilator, is typical of the
performance expected from a dual phase motor control pump. As observed, actual
stroke rate varies considerably as the phase ratio reaches its outer limits. Users should
be aware of this relationship and develop appropriate curves to assure experimental
data.
Figure 4. Dual Phase Rate Compensation Chart
Phase Ratio (% Inspiration)
Typical plot of actual stroke rate at various ratios and strokes.
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