Harvard Apparatus 613 User Manual page 7

Operation
5
Connecting Rod
Calibration
Panel
Adjusting Nut
Figure 2. Stroke Volume Adjustment
% Inspiration
This knob controls the inspiratory ratio.The inspiratory ratio can be changed from 25-
50% of a single stroke cycle.This control is continuously variable while the pump is in
operation.
Breaths/Min
This knob controls the number of strokes/minute to be delivered by the pump.The
stroke rate is affected by the phase control setting. Please refer to graph on page 7.The
Stroke Rate Control is continuously variable while the pump is in operation.
Stroke Volume Adjustment
Stroke Volume is determined by the position of the Connecting Rod on the crank.
Loosen the Adjusting Nut, set the Connecting Rod to the desired position according to
the Calibration Panel, and then tighten. (See Ventilation Graph, pg. 8).
CAUTION: Stroke volume should not be adjusted while the pump is in operation.
CAUTION:
Stroke volume should not be adjusted while
pump is in operation.
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