Haemonetics Cell Saver - Cell Saver Control Panel Usage; Operator Button Interaction

Copyright © 2009 Haemonetics Corp.
An operator always uses the Cell Saver in Automatic
mode and occasionally accesses troubleshooting
information.
How many buttons on the control panel do they touch?
3 (4 if they include Stop)
What are they?
Start, Yes, Help (Stop)
What do you think?