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Post by Kts on Sept 21, 2021 11:47:03 GMT
Good day all,
I'm new to the world of Braun machines, I have one that keeps giving an intermittent alarm bicarbonate mix ratio (SUP). Any help would be appreciated.
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Post by Admin on Sept 21, 2021 12:00:52 GMT
What is your temp sensors TSBIC, TSD, and TSDS? What version machine? What is the BIC RPM and BIC RPM SUP?
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joey
Full Member
Posts: 227
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Post by joey on Sept 22, 2021 12:48:43 GMT
Also do you use jugs of bicarb, Solcart, Bicarb loop?
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Post by SrCusEngr on Sept 25, 2021 18:43:40 GMT
Just as a quick check, go to the Low Level Manual Calibration screen 2.10 in TSM. Now check that the numbers are set to 25/38/35 from top to bottom. Note that there are two ratios for Bicarbonate: the first is for central or jug use, the second (Cart) is for Solcart use.
What is the RATIO? In simple terms, it is the rate of flow (determined by the speed of BICP) of the bicarbonate solution to the flow of the water. Remember. this is a three stream system: water, bicarbonate and acid. The bicarb and acid pumps spin at a certain rpm to produce dialysate (for 45X that is: 1 part acid; 1,72 parts bicarb; 42.28 parts water). Because no system is perfect, there has to be a tolerance. Therefore, if the pump speed is calculated to fall outside of a particular upper/lower limit (fixed in the software) such that the ratio of pump speed to water flow falls outside of 25 +/- 7 or 35 +/-7, you will have a ratio alarm. And because pump speed is determined by the conductivity (it is a basic servo system; BICLF goes up. BICP rpm goes down to maintain BICLF at its desired setting) and Temperature affects the calculation of the conductivity, there are several important items to check to insure all is in order. Lastly, the physical pump output flow should also be checked. Each pump is telling the computer that it is moving so many microliters per stroke. If the machine has many hours on it, the actual programmed stroke value may be far off from what it is currently producing. The computer has no way of knowing that the stroke value is incorrect.
Let us know what you find.
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Post by bcjammerx on Sept 28, 2021 1:57:52 GMT
when I've had this I've found one of the conductivity sensors was off. I had to re-calibrate them or replace them. I'd start with calibration myself and see if it passes tests after. I have had to replace the biclf (smaller one) once and endlf (longer one) another time and another time both...but in those cases I could see that they weren't showing the conductivity when hitting the wrench icon, they were below 13, usually around 1 or so. When I only re-calibrated they were showing conductivity (13.xx) but weren't equal. Also I've had to re-calibrate or replace when the machine wouldn't finish disinfect...again had to see what the sensors were displaying to see if it was calibration or faulty sensor. I've also had a brand new conductivity sensor be bad but only had that happen once
Be sure when calibrating your temp is stable around 37-38 and stays there, use diluted acid for the first 3 points and undiluted for the last point (14)...just follow the service manual exactly and make sure your meter is accurate. And don't forget to calibrate if you replace the sensors
*edit
forgot it COULD be a leak in a membrane, I've seen that too :\
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Post by kts on May 5, 2022 20:28:04 GMT
Thanks for all the help guys I found the problem i hadn't set the bic to 38 in cal 2.10 dumb noob mistakes not new to dialysis just bbraun.
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Post by Chuck Weddle on May 5, 2022 20:40:55 GMT
Thanks for all the help guys I found the problem i hadn't set the bic to 38 in cal 2.10 dumb noob mistakes not new to dialysis just bbraun. I hope it didn't take 7 months to figure this out? |
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Post by kts on May 23, 2022 15:46:55 GMT
No I just realized that I didn't answer what I had found so I updated the post.
Thanks for the help
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DTECH
New Member
Posts: 21
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Post by DTECH on Sept 29, 2022 11:24:47 GMT
I am having one of these go wrong during treatment with an additional alarm of "bicarbonate empty, swap with new", it doesn't seem to have a trend of why it is going wrong, 2 hours into treatment the BICLF sensor will begin to read 0, even when there is plenty of salt left in the cartridge and the alarm for bicartidge is empty will appear, it has happened while being 1 hour and 3 hours into treatment and other times it doesn't alarm at all. it will only alarm once throughout treatment and will always sort itself out.
I have checked the mixing ratios are set up correctly 25/45/35, the O-rings were recently replaced and error still occurred, y piece connector going to BICP has been cleaned, DBK is sound as a whistle, any help will be greatly appreciated, I'm feeling it could possibly be a faulty valve when it gets hot it plays up
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btech
New Member
Posts: 43
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Post by btech on Sept 29, 2022 12:38:37 GMT
I am having one of these go wrong during treatment with an additional alarm of "bicarbonate empty, swap with new", it doesn't seem to have a trend of why it is going wrong, 2 hours into treatment the BICLF sensor will begin to read 0, even when there is plenty of salt left in the cartridge and the alarm for bicartidge is empty will appear, it has happened while being 1 hour and 3 hours into treatment and other times it doesn't alarm at all. it will only alarm once throughout treatment and will always sort itself out. I have checked the mixing ratios are set up correctly 25/45/35, the O-rings were recently replaced and error still occurred, y piece connector going to BICP has been cleaned, DBK is sound as a whistle, any help will be greatly appreciated, I'm feeling it could possibly be a faulty valve when it gets hot it plays up Please dont set the ENDLF ratio to 45 it is not allowed. The maximum allowed setting is 40. If you are using a 1:44 concentrate it is enough to set it to 38 if they are only using 1:34 it is ok to set it to 31 |
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DTECH
New Member
Posts: 21
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Post by DTECH on Sept 29, 2022 14:58:53 GMT
I am having one of these go wrong during treatment with an additional alarm of "bicarbonate empty, swap with new", it doesn't seem to have a trend of why it is going wrong, 2 hours into treatment the BICLF sensor will begin to read 0, even when there is plenty of salt left in the cartridge and the alarm for bicartidge is empty will appear, it has happened while being 1 hour and 3 hours into treatment and other times it doesn't alarm at all. it will only alarm once throughout treatment and will always sort itself out. I have checked the mixing ratios are set up correctly 25/45/35, the O-rings were recently replaced and error still occurred, y piece connector going to BICP has been cleaned, DBK is sound as a whistle, any help will be greatly appreciated, I'm feeling it could possibly be a faulty valve when it gets hot it plays up Please dont set the ENDLF ratio to 45 it is not allowed. The maximum allowed setting is 40. If you are using a 1:44 concentrate it is enough to set it to 38 if they are only using 1:34 it is ok to set it to 31 Most of our home patients machines were set up this way by a Bbraun engineer, I think across most our sites all ENDLF is set to 45 instead of 38, we do use the 1:44 concentrate aswell |
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