Deleted
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Post by Deleted on Jul 12, 2021 12:02:47 GMT
Hello all, Having issues with a Bluestar that only has about 4500 hours. The conductivity is running on the low side and is disrupting txs now. When only plugged into acid it will only go to 10.8-10.9. I have rebuilt and calibrated the pumps, tried different bicarbs (bibag, liquid, and even made some) all the bicarbs are in range. I've tried fresh acid and different baths. When plugged in to both, TCD at 13.5, machine will bounce between 12.9-13.1. In and out of range. Any suggestions would be greatly appreciated. Thank you. |
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Post by bsquared on Jul 12, 2021 15:44:02 GMT
Sounds like a bad Condo cell to me.
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mtw2
New Member
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Post by mtw2 on Jul 13, 2021 13:38:27 GMT
Check your acid and bicarb filters. Sometimes if dirty can cause low conductivity.
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Post by dave74 on Jul 13, 2021 15:40:31 GMT
A torn balancing chamber membrane can cause low conductivity, but your machine doesn't have very many hours on it. The leak test is easy. It might be worth a shot.
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BMF
Junior Member
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Post by BMF on Jul 14, 2021 12:00:16 GMT
Have you verified the displayed conductivity with an independent meter?
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Deleted
Deleted Member
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Post by Deleted on Jul 14, 2021 12:28:05 GMT
I changed both filters, and I verified it with my independent meter - which was also reading low
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Post by Chuck Weddle on Jul 14, 2021 12:39:37 GMT
Keep in mind, I have still have a working knowledge of Fresenius machines but am far from an expert.
This problem however sounds pretty generic.
You've already proved the problem isn't pump calibration, conductivity cells, or bicarb.
That pretty much only leaves the balancing chamber. As dave74 said, it could be a torn membrane or, an air leak since the conductivity bounces. BC volume calibration is also a possibility.
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Post by whitechocolate on Jul 22, 2021 18:27:46 GMT
Have you calibrated Dialysate Conductivity Cell, Bicarb Conductivity Cell and Conductivity Conformation Cell??
I've also found that after pump rebuilds with the updated spring kits, running machine through heat disinfect before doing any calibrations seem to "break in" the springs. It gives me a better calibration and typically puts me dead on TCD.
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Post by SF BioMed on Jul 27, 2021 20:05:34 GMT
Easy to check you Balance chamber, take the drain hose hold at a 45 degree angle, if you get pulse stop pulse stop, balance chamber is ok, if you get a pulse dripple pulse stop in any order. you have a hole in the balance chamber.
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Post by whitechocolate on Aug 3, 2021 18:29:21 GMT
Its possible transducer #10 could be the issue.
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Deleted
Deleted Member
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Post by Deleted on Aug 9, 2021 16:19:19 GMT
Hello all, Having issues with a Bluestar that only has about 4500 hours. The conductivity is running on the low side and is disrupting txs now. When only plugged into acid it will only go to 10.8-10.9. I have rebuilt and calibrated the pumps, tried different bicarbs (bibag, liquid, and even made some) all the bicarbs are in range. I've tried fresh acid and different baths. When plugged in to both, TCD at 13.5, machine will bounce between 12.9-13.1. In and out of range. Any suggestions would be greatly appreciated. Thank you. Are you saying when you change baths like going from a 2K2.5Ca to a 3K2.5Ca the conductivity goes up? |
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Post by DIATECH on Aug 19, 2021 22:27:19 GMT
Your calibrations might not be saving due to bad IC20 chip or bad function board. Perhaps, you might have bad ACID pump.
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Post by briancanufixthis on Mar 17, 2023 12:12:24 GMT
I have had similar issue. when switching from 2k2.5 to 3K3 or 1K3.5 the condo was right on the border and will alarm during the treatment.
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