Our new Inficon Bayard Alpert vacuum gauges have a drift issue. The plot shows three gauges in the corner; PT170, PT180 vs PT120 (cold cathode). The cold cathode is trending flat or down while the two inficons are trending up.

The two inficons located in the two end station are flat, however.

Perhaps the upward drift on the two LVEA gauges is due to some "wet" hardware the gauge was mounted with??Gerardo plans to talk with technical folks at Inficon. The LVEA gauges are mounted on BSC 7, BSC8 and BSC2(PT120 cold cathode)