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Post by texasbiomed on Dec 22, 2023 14:11:05 GMT
I have a T-Machine with bi-bag with 16000 hours that keeps coming back for neg and positive pressure test fails. I've checked for any leaks, none found, checked brushes and they are in good condition. Deareation and flow pressures are also in range. My CFS readings on debug screen 10 are good at 5.7. Conductivity and temp are almost perfect. Temp is 36.9 and conductivity is at 13.8 with a TCD of 13.6. Heck, my FLWP is at 158 when DFR is at 800. I've tested the machine 2-3x's every time it comes to the tech repair room, and I can't seem to duplicate the issue the staff is reporting. Is it possible that the staff is doing something wrong? What am I missing here?
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stuff
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Posts: 230
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Post by stuff on Dec 22, 2023 15:02:45 GMT
If your referring to ACFS It should be fluctuating and not 1 steady number
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Post by texasbiomed on Dec 22, 2023 15:44:44 GMT
stuff, CFS fluctuates as it should. Was talking about the high box on screen 10 is less than 6 as it should be.
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Post by Guest2day on Dec 22, 2023 18:47:02 GMT
Check your loading press valve, flow relief valve, air sep chamber housings & UF pump for micro leaks. Negative pressure fails comes first before the positive. Most of the time once neg is fixed the pos should be resolved as well. If not it could be BC valve related or air sep chamber &/Or V43. Re-cal TMP.
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Post by somewhere on Dec 25, 2023 16:56:40 GMT
problem he cannot duplicate the test.
if is air separator or micro leak it would show when he tests
it. rinse hard with the hanson door open for about 45 min. and see if can detect any leaks, if no put in heat ntil it reach 80 degrees c. and check for any leaks. no leaks then test it again if it passes test, unable to duplicate. then you will have to talk with staff when ypu are working on it and show them it passes multiple times.
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Post by Freseniusguy123 on Dec 26, 2023 1:57:57 GMT
Balancing chamber solved my issue. I had a neg stabilize that would never pass. It barely was passing positive. Something in my BC caused it to fail until I replaced it with a new one.
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Post by gnurk on Dec 26, 2023 13:26:49 GMT
do an induced negative pressure test use flashlight to look for air bubbles tmep must be kept over 400, the do a induced positive pressure test let it go for 15 minutes and look for leaks
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Post by texasbiomed on Dec 28, 2023 16:55:12 GMT
Thanks for all advise. Machine is currently on the floor and has not returned to my office. I've made very minor adjustments to my pressures. Will continue to monitor.
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Post by dave74 on Dec 28, 2023 17:02:14 GMT
Thanks for the update.
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Post by texasbiomed on Dec 29, 2023 21:33:44 GMT
Long Rant.....Well, the damn machine came back.  This time it failed Online PHT. I had already calibrated the FLWP to 155. Machine was tested on the floor during turnaround, and it failed it every time I would test it. When PHT would go back to normal, FLWP was reading at 156-157, so I know my adjustment was correct. I asked PCT if it's been failing the neg pressure test and did state that it did. All he did was place the machine on 800 DFR and once it stabilized, it passed. Machine was pulled and hydraulics were pulled out. There was no evidence of any leaks anywhere. Tested Online PHT and it passed every time in my office. WTH!! Proceeded to check my dialysate pressures and I was not able to reach the -250 mmHg on my 90XL meter. I replaced the dialysate pressure transducer and attempted to reach the -250 mark. Again, it was only reaching -25 mmHg. Tried it again and it never went above -120 mmHg. Contacted tech support and was instructed to induced a positive pressure test. No leaks were found. She asked me to replace the diasafe filter and try the calibration again. That's all they could come up with. So not so much help there. Either way, no luck on the calibration. I've been doing this for almost 7 years and have never encountered a machine that I couldn't figure out. My next option is to replace the Actuator test board. Not sure how that would take care of my dialysate pressure calibration, but I guess it's worth a try. |
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Post by dave74 on Dec 29, 2023 21:51:57 GMT
If you have a closed system with the flow off, how can the pressure not go more negative? Are you sure about your 90XL? What about your displayed TMP? It seems like you would be getting unusual readings.
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Post by texasbiomed on Dec 29, 2023 22:01:08 GMT
I'll look into another 90XL, but I've have used 2 different up to date pressure modules. When I performed the induced pressure test, my display TMP reached 560. My TMP at 800 DFR averages around 250.
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Post by gnurk on Dec 30, 2023 13:26:14 GMT
check your pressure gauges with known good ones as they will go bad over time
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Post by Texas Tech on Feb 6, 2024 12:19:40 GMT
replace transducer #9. if it is a C model they are faulty.
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This time it failed Online PHT. I had already calibrated the FLWP to 155. Machine was tested on the floor during turnaround, and it failed it every time I would test it. When PHT would go back to normal, FLWP was reading at 156-157, so I know my adjustment was correct. I asked PCT if it's been failing the neg pressure test and did state that it did. All he did was place the machine on 800 DFR and once it stabilized, it passed. Machine was pulled and hydraulics were pulled out. There was no evidence of any leaks anywhere. Tested Online PHT and it passed every time in my office. WTH!! Proceeded to check my dialysate pressures and I was not able to reach the -250 mmHg on my 90XL meter. I replaced the dialysate pressure transducer and attempted to reach the -250 mark. Again, it was only reaching -25 mmHg. Tried it again and it never went above -120 mmHg. Contacted tech support and was instructed to induced a positive pressure test. No leaks were found. She asked me to replace the diasafe filter and try the calibration again. That's all they could come up with. So not so much help there. Either way, no luck on the calibration. I've been doing this for almost 7 years and have never encountered a machine that I couldn't figure out. My next option is to replace the Actuator test board. Not sure how that would take care of my dialysate pressure calibration, but I guess it's worth a try.