When should I use the composite output on my MPVS Ultra unit?

The composite volume output on the front of the MPVS Ultra unit should only be utilised when using a multi-segment catheter for large animal PV studies.  The composite output is a combination of all the individual Volume outputs from the separate catheter segments, so when connected to the PowerLab allows you to visualise the combined Volume in one channel of LabChart.
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When using single segment catheters, there is only one volume measurement.  In this case you should use Output S1 on the MPVS Ultra unit and NOT the composite output.