kyle
New Member
Posts: 39
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Post by kyle on Oct 27, 2022 17:40:58 GMT
My Aquaboss RO display panel (from permeate conductivity under specifications) reads different conductivity from the Jumo module. The display panel reads 50 uS/cm while the Jumo module reads 5 uS/cm. I checked the RO product water with a MyronL and it reads 5 uS/cm which means the Jumo module is reading right. Already changed the CPU board of the Aquaboss RO per suggestion of Bbraun tech support but I'm still having the same problem. Tech support told me that they are gonna reach out to other techs and will get back to me after they have answers lol
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Post by Admin on Oct 27, 2022 20:10:28 GMT
Possibly the LT1 board
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kyle
New Member
Posts: 39
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Post by kyle on Oct 27, 2022 20:13:26 GMT
Already tried switching up the LT1 board from the HRS.. Still same problem exists. |
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Post by Admin on Oct 27, 2022 20:18:28 GMT
Then the wiring from the jumo to the LT1 or the cpu ribbon cable
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Post by Chuck Weddle on Oct 27, 2022 21:48:34 GMT
I only have minimal knowledge of the Aquaboss and no clue what Jumo is so, I'm just spitballing these thoughts.....
1. I find it odd that the difference between the readings is exactly 10X.
2. Old Myron L meters had a selector knob to select a multiplier. Coincidently, one of the options was 10X. Does the Aquaboss maybe have a setting like this?
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Post by Admin on Oct 27, 2022 23:52:28 GMT
I also find it odd it’s x10 exactly. The AB shouldn’t have this setting unless the higher condo was on the Jumo
Chuck - the Jumo is the secondary temp / condo measurement in the event of a cpu failure
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Post by Chuck Weddle on Oct 28, 2022 11:25:15 GMT
More random thoughts that are probably way off base.... - When I have seen conductivity issues with other RO's it has always been the temperature/conductivity sensor. When we've had sensors fail, the readings have been erratic and bouncing around or totally non-existent.
- We used to have a hand-held conductivity meter that you could not only change the temperature compensation % but also could turn it off completely. Does the AB have settings like this?
- If it were a board issue, I would think it would be blank or at least something whacky and not a precise 10X reading.
- Do a manual calculation of the % rejection using conductivities from your Myron L for both incoming and product water and see how it compares to what the AB calculates.
Just because I'm bored..... - RO and dialysis machine conductivity monitors must be temperature compensated per AAMI guidelines.
- With temperature compensation, the displayed conductivity is the conductivity that solution would be if the temperature is 25 C, regardless of what the temperature actually is. I don't know about the AB but my RO's only display the incoming water temperature and not the product water.
- If memory serves... the compensation factor for water is 2%. So, for every degree C from 25 the water is, the monitor adjusts the displayed value by 2%.
- A 10 degree change in temperature will only be about a 1 uS/cm deviation from 5 uS/cm so even if compensation is turned off, I don't think that would be your problem. BUT, if the compensation factor is not correct, that could make a big difference.
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Post by Admin on Oct 28, 2022 17:25:56 GMT
I have a feeling it’s a Jumo / jumo setting issue
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Post by Chuck Weddle on Oct 28, 2022 18:45:19 GMT
I have a feeling it’s a Jumo / jumo setting issue But the Jumo reading of 5 uS/cm agrees with the Myron L and is an acceptable conductivity. The 50 uS/cm on the RO panel is rather high. Another thought.....Could the 50 uS/cm reading be from the 1st stage and the Jumo 5 uS/cm be from the 2nd stage? Maybe there is an actual problem in the 1st stage? |
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Post by Admin on Oct 28, 2022 18:48:12 GMT
I have a feeling there’s a setting in the Jumo that’s causing it to be off from the cpu
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Post by Chuck Weddle on Oct 29, 2022 8:39:14 GMT
Hopefully kyle comes back and lets us know what the problem was.
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kyle
New Member
Posts: 39
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Post by kyle on Nov 2, 2022 15:17:13 GMT
Hello, just got it checked yesterday. Tried switching the ribbon cable from the HRS to the AB but still problem exists. Condo on Jumo module was 6 uS/cm and AB was showing 40-45 bouncing up and down. Again, we checked the RO Prod Out to verify and it was reading the same as the Jumo module.. I was thinking if there is any way to calibrate or check the settings on the AB that's causing this? Also thinking if my RO is balanced incorrectly that is why it's showing that value on the AB? Thanks for the help guys, been running just on emergency mode because of this issue and already been 2 weeks..
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Post by Chuck Weddle on Nov 2, 2022 15:52:06 GMT
I would suggest calling Braun tech support and talking to Adam. He is their AB guru.
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kyle
New Member
Posts: 39
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Post by kyle on Nov 2, 2022 16:05:13 GMT
Thanks! Been talking to Brian lately and following his instructions. Will try to get a hold of Adam to see what can he do to help
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Post by Admin on Nov 2, 2022 16:29:45 GMT
Honestly, Try a different Jumo. The signal comes from the probe to the Jumo, then from the Jumo to the LT1, then from the LT1 to the CPU. If the LT1 is getting "bad information" from the Jumo - then it's going to display bad information.
Try that and let us know.
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