[Hallb-engineering] Torus polarity probe

[Krister Bruhwel]

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
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Hallb-engineering mailing list
>>>>>>> Hallb-engineering at jlab.org
>>>>>>> https://mailman.jlab.org/mailman/listinfo/hallb-engineering
>>>>>>>
>>>>>>>
>>>>>>
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>>>>
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