Last week HAM6's vacuum gauges were upgraded from the original pirani-coldcathode pair to the new Beckhoff Infinicon BPG-402. The new gauge has two channels (MOD1 and MOD2) which both record the vacuum over the full range of atmospheric (760 Torr) down to 1.e-09 Torr
I have renamed the archived Cold-Cathode minute trend files to match the new MOD1 name. In other words, if you ask for minute trend data prior to 8/10 for channel H0:VAC-LX_Y0_PT110_MOD1_PRESS_TORR you will be given data for the CC channel H0:VAC-LX_Y0_PT110B_PRESS_TORR. Note the archvied Pirani data is not accessible from NDS. I will write code to obtain data directly from the raw minute trend files if this is needed.
I will make the same changes for the other gauges which have been upgraded (PT170 and PT180)
here is a minute trend log plot of HAM6 vacuum from 7/34 to present. Note the Y range from 1.0e-07 to 1000. The gap in the middle is when HAM6 was opened and the Cold Cathode gauge was turned off (reporting 0.0 which does not plot on a log scale).