In an attempt to fix the noisy/spiky gauge on HAM6, it appears the one and only hot cathode filament is not working. Yesterday we degassed the filament but readback was still noisy, and randomly spikes above in-chamber high voltage set point of 1e-5 Torr, causing HAM6 shutter to depower. Today I replaced the electronics with a set from brand new gauge but the gauge would not read beyond e-2 Torr and emissions command gave an error. It appears that the filament has failed. Waiting for response from manufacturer. Gauge is Inficon BCG450-SE, Bayard-Alpert Pirani Capacitance Diaphragm style. 

Meanwhile, Kyle and Fil found a work around and are currently interlocking pressure for HV trip from the readout of 10 l/s ion pump recently installed on new HAM6 RGA manifold.