03/11/2014
Four-paddle is changed to two-fold, three-fold and four-fold coincidence using PMT (3&4,2&3&4, 1&2&3&4) respectively. DAQ started from 03/11/2014 15:00.
07/29/2014
An abnormal spike was observed at 07/28/2014 15:00, which was caused by the equipment test of other experiment happened in the same room as four-paddle. This spike was corrected by replacing it with average counts from 15:00 to 16:00 without the minutes when spike happened. 
09/15/2014
Abnormal scaler values were found from two fold coincidence channel.
1667638 09/11/2014 09:52:37
628229  09/12/2014 11:03:17
1667638 09/11/2014 09:52:37
The above three values were replaced with average values of a hour before and after them.
10/09/2014
Four-paddle detector is temperary down for being moved to a new location.
10/30/2014
Four-paddle detector was moved to a new location (25 Park Place, 26th floor).
New round of data recording has started since 10/25/2014.
02/05/2015
Two lines of abnormal scaler values were found in Feb. 03, 2015 08:23 am - 08:24 am. Muon counts in these two minutes were replaced with average values of a hour before and after them.
06/11/2015
DAQ system was found stopped working on 05/11/2015. The program was restarted. Several hours data were missing due to this event.
06/19/2015
The logic unit of 2-fold was found not working. A new unit was used for 2-fold coincidence. A efficiency factor of 1.025 has been applied to the early data of 2-fold coincidence to match the measurement before and after 06/19/2015. 
12/09/2015
The detector is temporarily stopped because of the renovation in the room where the detector locates.
03/09/2016  
Online monitering of muon flux is back online after a series of DAQ system fix and updates, which include replacement of coincidence module and adjuseting threshold values of discriminator and voltages of power distribution box.