Subject: Re: [sloan-25mlog 3580] Re: 2.5m obslog 20170624 (SJD 57929)
From: Fritz Stauffer
Date: Sun, 25 Jun 2017 08:48:33 -0700
The dust counters sometimes disconnect and then cannot reconnect again.  =
Right now, the outside dust counter hardware has a hung up port and the =
software is waiting for it to time out.  The hand held is the backup for =
those times.  I am still trying to figure out why the counter sometimes =
gets in this state.
As for humidity levels, the outside dust counter is turned off when the =
dewpoint depression is  On Jun 25, 2017, at 8:02 AM, John Downey  wrote:
>=20
> It seems a little odd that it would stop counting due to humidity, =
though I will be the first to admit that I don't know as much about this =
system as I probably ought to know.
>=20
> The manual says that it's function range of RH is 20% to 95%, looking =
at the apo actor log, it stopped counting dust one reading after the =
humidity went over 80% - presumably we are telling it to do this?
>=20
>=20
>=20
>> On Jun 25, 2017, at 6:49 AM, Russet McMillan  =
wrote:
>>=20
>> The dust counter also stops when the dewpoint sensor (outside =
Optidew) is recalibrating, which is pretty annoying.  Ed was looking =
into how often this unit recalibrates during the night, but I don=E2=80=99=
t know what his conclusions were.  It certainly seems to do it pretty =
often, not just once a day.
>>=20
>> When stopped due to humidity (or fake humidity), the dust counter =
says DpDep in cyan.  When stopped due to failure of communications, =
it=E2=80=99s royal blue.  More rarely it just stops updating and =
displays stale numbers, which is a different problem.
>>=20
>>> On Jun 25, 2017, at 7:42 AM, John Downey  =
wrote:
>>>=20
>>>>=20
>>>> Dust ~ 4500 (but the monitor stopped reading during the night)
>>>>=20
>>>=20
>>> Probably this is due to excessive humidity, I've noticed before that =
the counter can stop reading when it gets very humid.
>>> ____________________________________________________________
>>> Logs of Nightly APO Activities
>>> =
https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html
>>=20
>=20
> ____________________________________________________________
> Logs of Nightly APO Activities
> =
https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html