Wednesday, January 17, 2018

A151 CLSL Activities Blog

17Jan 2018, Wednesday - DLO

On Tuesday, January 23, 7:30 - 8:30 a.m., two planned power sags of up to 10 V, for up to 2 sec each.  Instrumentation shutdown intended.

12 Jan 2018, Saturday - DLO

Small chance of an unplanned power outage possible for Tuesday, January 16, 7 a.m. to 5 p.m.

Dry air pressure drop occurred the afternoon of Friday, January 11 between 1 p.m. and 5 p.m.  Back-up nitrogen should have covered this pressure drop, but data acquired then should be examined.

8 Jan 2018, Monday - DLO

Small chance of an unplanned power outage possible for Tuesday, January 16, 7 a.m. to 5 p.m. 

20 Oct 2017; DLO

A voltage sag occurred in A151 CLSL on Friday, October 20.  It does not appear to have affected the NMR Lab in A151 CLSL. The sag was apparently 5.1% for 50 ms.  Our on-line data indicates that it occurred today at 14:47:50.  The reason has not been determined.


7July 2017; DLO

The electrical outage conducted on the 2nd floor Thursday, July 6, resulted in an unexpected Internet outage for the NMR Lab from 6:15 a.m to 8:48 a.m., an outage that included other parts of CLSLA.  The 750NB had to be re-mounted to Samba.  Temperature data and dry air data were not acquired during this time interval.  An oscilloscope monitoring the 750WB could not be viewed over the Internet starting at 6:15 a.m.  It was not fully understood that the Internet closet on the 2nd floor would be affected by the power outage, but it clearly was.


3 July 2017; DLO

An electrical outage is planned on the 2nd floor for 6 to 10 a.m. on Thursday, July 6.  Not expected to affect the NMR Lab in A151 CLSL. 


14 June 2017; DLO


Last night, the cooling failed in A151.  Here are some key observations:

The temperature data for A151 shows a distinct increase at 10:30 p.m.  One might guess that something turned off at that time.

The temp increased from 68 F to 82 F from 10:30 p.m. to 4:30 a.m.  That’s 14 degrees F in 7 hours.

John Rosheck did us a huge favor by sending an mail to the F & S help desk at 12:05 a.m.  I am unaware of any overnight response to this that would have set the heating event to a cooling event about 4:30 a.m.

    From about 4:30 a.m. to 6:30 a.m., the temperature recovered to the original 68 degrees F.
    John noticed an event in the power monitoring for A151.  At about 10:30 p.m., a small drop in the monitored power occurred.  At about 4:30 a.m., a small increase occurred.  We don’t know that this means.  You have to look carefully, but the signature is there.  This matter is apparently resolved,  but we are not sure exactly what happened our how it could be prevented.  Also, we are not sure how it was discovered, as F&S wrote to John and said he had contacted IT, not F&S.  An F&S person named Paul Barton thought compressors went off at some point.  Times not verified.

5 June 2017; DLO

No special activities planned from this date forward.  Any changes will be posted here.