Post by bcjammerx on Feb 7, 2023 2:41:22 GMT
This is unrelated to my previous uf issues.
I was doing a pm on this machine and got to the uf check. I set the mock treatment for 30 min and to pull 125ml. I used a 250ml graduated cylinder. I weighed it before and after to get an exact amount. After 30 min it had pulled 200ml. I calibrated the uf pump and got 107, repeated the test and this time it pulled 150ml. I replaced the uf pump and redid calibration, got 107 and some change. again it pulled 150ml. So I replaced the balance chamber membranes, only one of the prongs had some deformation but not much. the membranes sealed perfectly on a flat surface. I then set the uf calibration to 111. This time it pulled 133ml. Good enough to pass, but I'm not pleased with the fact that I had to set the uf pump calibration to 111 when I had ACTUALLY measured 107 and some change. To get that I did the uf calibration via the manual, I weighed the before (250ml) and after and got 107.2 And even at 111 it still wasn't perfect.
All the sensors for the uf matched, no alarms previously or while doing my mock treatments, and no patient or staff complaints of patients leaving dryer than expected either.
machine is v9.12 with a little over 20k hours. Not noticing any air bubbles or leaks otherwise either. I've never had one do this, usually my uf check goes without event.
Thoughts?
I was doing a pm on this machine and got to the uf check. I set the mock treatment for 30 min and to pull 125ml. I used a 250ml graduated cylinder. I weighed it before and after to get an exact amount. After 30 min it had pulled 200ml. I calibrated the uf pump and got 107, repeated the test and this time it pulled 150ml. I replaced the uf pump and redid calibration, got 107 and some change. again it pulled 150ml. So I replaced the balance chamber membranes, only one of the prongs had some deformation but not much. the membranes sealed perfectly on a flat surface. I then set the uf calibration to 111. This time it pulled 133ml. Good enough to pass, but I'm not pleased with the fact that I had to set the uf pump calibration to 111 when I had ACTUALLY measured 107 and some change. To get that I did the uf calibration via the manual, I weighed the before (250ml) and after and got 107.2 And even at 111 it still wasn't perfect.
All the sensors for the uf matched, no alarms previously or while doing my mock treatments, and no patient or staff complaints of patients leaving dryer than expected either.
machine is v9.12 with a little over 20k hours. Not noticing any air bubbles or leaks otherwise either. I've never had one do this, usually my uf check goes without event.
Thoughts?
