[dsg-svt] SVT trip

[Peter Bonneau]

There is instability in the SVT coolant temperature signal.

This instability is shown on the two attached Mya data-logger charts 
from yesterday.

Chart #2 shows the temp dropping suddenly to -25C then back to normal in 
less than 2 minutes.

The signal originates at the Proteus Industries sensor on the chiller 
line and is then connected to the Florite 990x Controller.

The controller outputs an analog voltage which is sent to EPICS and the 
Hardware Interlock System.

The -25C temperature is equivalent to zero volts (open) on the ADC.




On 1/30/2017 5:54 PM, Brian Eng wrote:
> Attached are the windows with the errors from the various screens.
>
> The coolant temp trip on the crio (both high and low) is the one that sticks out since that basically should never trip.
>
> In the process of powering back on now.
>
> ----- Original Message -----
>> From: "Brian Eng" <beng at jlab.org>
>> To: "Yuri Gotra" <gotra at jlab.org>
>> Sent: Monday, January 30, 2017 5:38:59 PM
>> Subject: Re: SVT trip
>> Ok, checking now.
>>
>>> On Jan 30, 2017, at 5:33 PM, Yuri Gotra <gotra at jlab.org> wrote:
>>>
>>> Brian,
>>>
>>> If you are still at the lab, could you please check the cause of the trip and
>>> power back the SVT. Thank you
>>>
>>> <gotra.vcf>
>>>
>>>
>>> _______________________________________________
>>> dsg-svt mailing list
>>> dsg-svt at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/dsg-svt

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