Subject: Re: [sloan-25mlog 3433] 2.5m obslog 20170325 (SJD 57838)
From: John Downey
Date: Sun, 26 Mar 2017 06:59:22 -0600
>=20
> (3) We swapped-out the SP1 180L dewar after it had an apparent leak =
during the
> force-fill at sunset; the pressure had dropped to ~5 psi. JohnD had =
contacted us
> warning of a possible leak at about the same time and is aware of this =
issue.
>=20
The initial problem we saw in the afternoon was a leaking pressure =
relief, which is something we deal with all too often.  That dewar was =
swapped for another, but based on the picture DanO sent me, I think that =
one may have been a mostly empty pressure building dewar and the added =
weight of it's extra plumbing tricked us into thinking it was full.
We'll have to watch the one DanO put on last night, but at this point I =
don't think the fill system is leaking.
John