[dsg-svt] SVT coolant flow meter failure at 100% solenoid field

[Yuri Gotra]

Brian,

The fact is that the failure/recovery of the flow meter is correlated in 
time with magnet reaching 100% and going back to zero field. Whether it 
is the meter itself or it's cable we need to take action. DSG could 
consider to perform a test with a spare flow meter if you have the same 
model. We discussed the issue with Bob and agreed that the chiller and 
both flow meters will be relocated to the end of the platform where the 
field drops rapidly from 500 G to 5 G. There will be a service loop on 
the cooling pipes and the cables. Some cables need to be longer, 
specifically the one which goes to the flow meter. Next week the 
solenoid will be powered up again, please check the re-routing that 
would be needed. Thank you


On 11/9/17 9:27 AM, Brian Eng wrote:
> So much for it being a magnetic field issue then since the field should be lower there.
>
> As far as I can tell there isn't any information available on selection criteria, but going by the specs I don't see anything unreasonable about it (Omega FLR6302D).
>
> The manual does recommend that there should be a filter installed, but that might just be a red herring like the field issue.
>
> If I recall correctly the signal/power cable is routed differently for the sensors (the bottom one runs on the downstream side of the cart), maybe that was the issue and not the meter itself?
>

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