[Dsg-mvt] Electricity for heating blanket and heat tape

Tue Dec 5 15:44:19 EST 2017

Hi Maxime,

The isobutane blanket is now working and the pressure in the tank is up 
to 30 psi.  You can begin mixing the 10% C4H10 in argon mix. We need to 
disconnect the pre-mix and check the valves are properly lined up.

The CF4 is still in the bldg 90 gas cage along with the remaining pre-mix.

I mounted the thermostat sensor bulb to the MFC mounting plate. Ready 
for power on it. I replaced the insulation as well as I was able. The 
current ambient temp is mild and each MFC makes ~ 12watts of heat from 
the solenoid control valve,  so this is good to go. Once the thermostat 
is powered up, it will be ready for the cold temps on the way.

Please take care manipulating the insulation behind the rack so you do 
not damage the thermostat bulb. This is mounted on the left side.

Thanks,

George

On 12/05/2017 11:58 AM, mdefurne wrote:
>
> Hi Jason
>
> Thank you very much. This morning, George was working on it and I hope 
> the blanket is just slow to warm up and not failing.
> George would like to have a thermostat installed to make sure heat 
> tapes will not overheat the flowmeters and consequently break them. I 
> agree that it would be safer since we are kind of blind in regulating 
> the power of the heat tape.
>
> Volker, Walt, would it be possible to have it done as soon as 
> possible? If everything goes well for the accelerator, tomorrow 
> evening we have beam sent in the Hall. But I cannot use the mixing 
> system yet. No real test have been done with it. These tests include 
> checks that the mixing system works well, but also tuning the HV 
> setting depending on the quality of the mixture. (depend strongly on 
> the mixture... this is part of the "calibration" of micromegas detectors).
>
> If we have everything we need to do the job, please try to have it 
> done today. I apologize for the rush but this mixing system was 
> supposed to be ready a long time ago and not the day prior engineering 
> run.
>
> Thank you,
>
> Kind regards,
>
> Maxime
>
> Le 05/12/2017 à 10:22, Jason Willoughby a écrit :
>> It was completed last night, however it appears the blanket does not 
>> work.
>>
>>
>> Jason Willoughby
>> FM&L Electrical Engineer
>> Thomas Jefferson National Accelerator Facility
>> 628 Hofstadter Road STE 1
>> Newport News, VA 23606
>> (757)-269-5372
>>
>> ------------------------------------------------------------------------
>> *From: *"mdefurne" <mdefurne at jlab.org>
>> *To: *"Jason Willoughby" <jasonw at jlab.org>
>> *Sent: *Monday, December 4, 2017 5:04:33 PM
>> *Subject: *Re: [Dsg-mvt] Electricity for heating blanket and heat tape
>>
>> Hello Jason,
>>
>> When do you think the electrician will add the plug to the blanket 
>> and for
>> the heat tape?
>>
>> Thank you,
>>
>> Kind regards,
>>
>> Maxime
>>
>>
>>
>> > George,
>> >
>> > Since you want this done quickly, I will have to modify the install 
>> a bit.
>> > In order to avoid an outage and ordering a new GFCI breaker, I will 
>> have
>> > the electrician install a plug on the blanket cord. This will allow 
>> it to
>> > be plugged into a GFCI receptacle.
>> >
>> >
>> > Jason Willoughby
>> > FM&L Electrical Engineer
>> > Thomas Jefferson National Accelerator Facility
>> > 628 Hofstadter Road STE 1
>> > Newport News, VA 23606
>> > (757)-269-5372
>> >
>> >
>> > From: "George Jacobs" <jacobsg at jlab.org>
>> > To: "Jason Willoughby" <jasonw at jlab.org>
>> > Cc: "mdefurne" <mdefurne at jlab.org>, "Matthew Marchlik"
>> > <marchlik at jlab.org>, "dsg-mvt" <dsg-mvt at jlab.org>
>> > Sent: Friday, December 1, 2017 2:14:18 PM
>> > Subject: Re: Electricity for heating blanket and heat tape
>> >
>> > Hi Jason,
>> >
>> > Sounds good. The blanket has a built in thermostat. Temperature is
>> > automatically controlled for 90F.
>> >
>> > Thanks,
>> > George
>> >
>> > On 12/1/2017 1:36 PM, Jason Willoughby wrote:
>> >
>> >
>> >
>> > George,
>> >
>> > The work is fairly simple and straight forward. I do not think an
>> > additional site visit is necessary. I plan on having the blanket hard
>> > wired to a SPST switch. Do you require a thermostat for the blanket?
>> >
>> >
>> > Jason Willoughby
>> > FM&L Electrical Engineer
>> > Thomas Jefferson National Accelerator Facility
>> > 628 Hofstadter Road STE 1
>> > Newport News, VA 23606
>> > (757)-269-5372
>> >
>> >
>> > From: "George Jacobs" <jacobsg at jlab.org>
>> > To: "mdefurne" <mdefurne at jlab.org>
>> > Cc: "Jason Willoughby" <jasonw at jlab.org> , "Matthew Marchlik"
>> > <marchlik at jlab.org> , dsg-mvt at jlab.org
>> > Sent: Friday, December 1, 2017 1:16:22 PM
>> > Subject: Re: Electricity for heating blanket and heat tape
>> >
>> > I have a meeting with Dr Chandler at 3pm, so, I will be at the 
>> target gas
>> > pad as soon as that is finished.
>> >
>> > George
>> >
>> > On 12/1/2017 11:19 AM, mdefurne wrote:
>> >
>> > BQ_BEGIN
>> > Dear George, Dear Matt,
>> >
>> > I went this morning with Jason to take a look at what needs to be 
>> done for
>> > having electricity for the heating blanket and the heat tape. Jason 
>> will
>> > certainly go back there this afternoon with an electrician around 3pm.
>> > George, can you please go with them?
>> >
>> > Once the electricity is installed for the blanket, I will start testing
>> > and using the mixing system. Is it OK? (I would like to already use 
>> pure
>> > Argon, can I?)
>> >
>> > Kind regards,
>> >
>> > Maxime
>> >
>> >
>> >
>> >
>> > --
>> > George Jacobs
>> > Jefferson Lab (TJNAF)
>> > STE 12
>> > 12000 Jefferson Ave.
>> > Newport News, VA 23606
>> >
>> > (office) 757-269-7115
>> >
>> > (cell)   757-876-0480
>> >
>> > (email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg
>> >
>> >
>> > BQ_END
>> >
>> > --
>> > George Jacobs
>> > Jefferson Lab (TJNAF)
>> > STE 12
>> > 12000 Jefferson Ave.
>> > Newport News, VA 23606
>> >
>> > (office) 757-269-7115
>> >
>> > (cell)   757-876-0480
>> >
>> > (email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg
>> >
>> > _______________________________________________
>> > Dsg-mvt mailing list
>> > Dsg-mvt at jlab.org
>> > https://mailman.jlab.org/mailman/listinfo/dsg-mvt
>> >
>

-- 
George Jacobs
Physics Detector Support Group
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606

(office) 757-269-7115

(cell)   757-876-0480

(email) jacobsg at jlab.org

(website) https://userweb.jlab.org/~jacobsg

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