We've noticed a peculiar behaviour on CP4 dewar level percent, the dewar is empty but the readback channel continued to read some level NOT = 0, some time ago we changed the level alarms to fix the channel from going yellow (alarm level).  Today the decision was to do a different fix, the equalizer valve at the instrument manifold was open a couple of turns (valve was closed), that makes the readback lines cancel each other out, thus making the dewar level percent for CP4 close to 0.

Alarm settings for CP4 dewar level percent have been reverted back to nominal numbers.