kyle.ryan@LIGO.ORG - posted 12:09, Tuesday 13 November 2018 - last comment - 12:21, Tuesday 13 November 2018(45254)
Reminder that new wide-range gauges max out at 750 torr
Can't see purge pressures via these gauges. Could be misleading if this detail gets forgotten.
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This is why we changed the wide-range gauge on HAM6 from the pirani style to triple gauge with capacitance diaphragm to accurately measure pressures as chamber is vented up to air. This triple gauge still utilizes a pirani to turn on/off the hot cathode filament.