Without actually being there (... I wish), it's difficult to know what else to suggest. But from the biomed tech's point of view I would ensure that I was happy that the pumps themselves were working OK (occlusion levels correctly set, and then checked out and (or) calibrated). In theory (at least) it is up to the medical and nursing staff to use them correctly. The biomed's role there (if any) is simply to *advise - but you could confirm that their set-up is sensible (if they will let you near it, that is).

Do you have access to the pumps in question (or are they constantly in use)? And what pump test equipment do you have?
I notice you are talking about the Fresenius Optima VS. Which alarm codes are being presented (this pump has both upstream and downstream pressure sensors)? There should be some nice graphics shown on the display, too.
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Which type of hospital are you at, by the way (government, private)? I only ask as back in my own happy days roaming around the Kingdom I found it necessary to do a fair amount of "hand holding" (or "helping the staff") - sometimes to an extent that would frankly be seen as unethical here in the UK. Not only direct involvement with setting up infusions (and CVP lines, and what-have-you) but also connecting up ventilators to patients, running the odd lab test, and even taking the occasional radiograph! I'm sure I'm not the only biomed of that era who was obliged to assist in such ways. Those were the days (?), but hopefully things have improved a bit (nursing staff wise) since then.