Date: Thu, 12 Oct 2006 13:41:33 -0400 (EDT)
From: jeg@astro.princeton.edu
Subject: Re: 2.5m obslog 20061011 (MJD 54020)
Sorry, Steph--terminology difficulty. I meant what you call a forced
*manual* fill. I guess hitting the trigger is a forced fill, now I think
about it, but I have always though the other. Anyway, forced manual fill.
thanks
--jim
On Thu, 12 Oct 2006, stephanie snedden wrote:
> Jim,
>
> This policy has been in effect for years, and every observer follows it. We
> open the building and force-fill the spectrographs before slewing to the
> first field. We do a force fill in auto mode, which uses the sensors to shut
> off the fill. We don't always stay to make sure LN2 starts to spit before the
> shutoff, but we DO monitor the weight of LN2 delivered to the spectrographs.
>
> Until the hardware problem with the full sensor (or wherever the problem
> lies) is fixed, we can revert to forced manual fills after opening.
>
> Steph
> On Oct 12, 2006, at 7:10 AM, jeg@astro.princeton.edu wrote:
>
>>
>> Could we possibly institute a policy of force-filling the spectrograph
>> dewars JUST before we go on the sky? Being very sure that everyone knows
>> how to tell that they are really full? We WILL get to the bottom of
>> all this stuff eventually, but in the meantime I think the policy
>> proposed will keep us from losing time on they sky.
>>
>> Thanks
>>
>> --jim
>>
>>
>