Please note that for the forseeable future the system function in the menu on the System Wide Checks browser page labelled as 

"Collect the Timestamp RAM values"  and "Start the Readout Timestamp error tracing" 

Are for the use of engineers only unless otherwise instructed. 

There is no harm in using them but the results may be confusing and it is not possible, at present, to detail a definitive set of instructions for their use.