[Hallb-engineering] Torus polarity probe

[Krister Bruhwel]

Hello,

I have changed the Magnets Alarm Handler Torus Current signal to 
Rclas1M.  It will alert the operators when the torus current goes below 
1500A.

Regards,
Krister

Krister Bruhwel wrote:
> Hello,
>
> I went to the Counting House and this is what I learned: they have an 
> alarm handler for magnets and the intent of the alarm handler is to 
> alert the operator when the Torus is ramping down (although the torus 
> alarm panel has a horn for just this purpose).  They use the actual 
> probe current for this alarm and in my opinion it should be the actual 
> Torus Current which is "Rclas1M" or the signed Torus Current 
> "torus_current".  This seems more intuitive as an alarm can be set for 
> each run based on the desired Torus current and not a fraction which is 
> the probe current.   This is  just a recommendation as its their alarm 
> handler and maybe they like fractions better for some reason.
>
> These alarm handlers in the Counting House are set up by operators for 
> operators and they generally know this and use them as tools.  They give 
> a heads up like the Torus is ramping down undesirably.
>
> The signed current from the probe is valuable for data crunching and 
> this needs to get fixed if it continues to provide problems.  I will 
> keep an eye on it and do what is needed.
>
> Regards,
> Krister
>
> Mac Mestayer wrote:
>   
>> Hello Dave;
>>
>> I have no problem with removing it from the alarm handler
>> if it cannot happen.
>>                 - Mac
>>
>> "mestayer at jlab.org", (757)-269-7252
>>
>> On Mon, 17 May 2010, David Kashy wrote:
>>
>>     
>>> Hello Mac,
>>> I believe then in this case we should have no alarm  on polarity!
>>> This is something that does not change once setup by the engineering 
>>> staff and only on request from the spokespersons and PDL.
>>>
>>> So my suggestion it to completely remove it from the alarm handler or 
>>> set the values to no alarm and just have the value in the data stream.
>>>
>>> What do you think? you may want to consult Stepan.
>>>
>>> Thanks
>>> Dave
>>>
>>>
>>> Mac Mestayer wrote:
>>>       
>>>> Hello Dave;
>>>>
>>>> I'm currently the PDL.  It's bad practice to tell shift
>>>> people to ignore an alarm, unless it's temporary.
>>>> I suggest that you post a message to the effect that
>>>> the alarm is not valid and should be ignored FOR NOW.
>>>> You (or Krister or Steve) should post it in multiple
>>>> places (post-it notes at various places, on white-board,
>>>> on today's banner for current run (talk to run coordinator)),
>>>> etc.  Please indicate that it's temporary, also date the
>>>> notes and sign them.
>>>>
>>>> Tell me if this is ok, and when it's been done.
>>>>
>>>>                 regards, Mac
>>>>
>>>> "mestayer at jlab.org", (757)-269-7252
>>>>
>>>> On Mon, 17 May 2010, David Kashy wrote:
>>>>
>>>>         
>>>>> Sounds good,
>>>>> then someone should talk to the PDL and have them explain to the shift
>>>>> workers that this is diagnostic for them and not to call the on call
>>>>> unless the magnet current it going down!
>>>>>
>>>>> Thanks
>>>>>
>>>>>
>>>>>
>>>>> Krister Bruhwel wrote:
>>>>>           
>>>>>> If I understand this correctly, its not part of the pager, but 
>>>>>> part of
>>>>>> an alarm system that the counting house folks made and use and should
>>>>>> not issue pages to the on-call pager.  They more than likely made a
>>>>>> manual page based on some GUI screen or alarm handler they set up.
>>>>>>
>>>>>> These are the only Torus signals that our alarm hander sends to the
>>>>>> on-call pager:
>>>>>>
>>>>>>
>>>>>>
>>>>>> David Kashy wrote:
>>>>>>             
>>>>>>> I consider this a nusiance alarm and it should be data logged but
>>>>>>> removed fromt he on call pager.
>>>>>>> The guys in the counting room should be watching the data from the
>>>>>>> detector and know if the torus is working properly.
>>>>>>> Krister,
>>>>>>> Please remove it from the pager and keep an eye on the read back. 
>>>>>>> Also
>>>>>>> check it out for a bad connection, or water dripping somewhere...
>>>>>>>
>>>>>>> Thanks
>>>>>>> Dave
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Steve Christo wrote:
>>>>>>>
>>>>>>>               
>>>>>>>> Between about 3:00am on 5/15 and midnight 5/16 the polarity 
>>>>>>>> probe on the
>>>>>>>> Torus was oscillating and giving an alarm based on the signed torus
>>>>>>>> current. The problem seems to have fixed itself and has not 
>>>>>>>> resulted in
>>>>>>>> any significant problems. It might be worth while to investigate 
>>>>>>>> the
>>>>>>>> cause during the next hall opening.
>>>>>>>> Steve
>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>> Hallb-engineering at jlab.org
>>>>>>>> https://mailman.jlab.org/mailman/listinfo/hallb-engineering
>>>>>>>>
>>>>>>>>
>>>>>>>>                 
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>>>>>           
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