leave the setup to get some data last night.
I overcome my 3457 GPIB read issue by re-initialize the bus (IFC), if an issue is encountered.
so after IFC the 3457 would be *happy* again to talk to the PC which makes it be able to read back the data continuously
data was taken each 7s or about 12s if a read issue occurred, 3457 setup is 100PLC, manual range, DISP OFF.
I forgot to get extra 7 digit in HIRES register, however the 10 hours run seem to be stable with 6.5 digits, a few outliers observed.