Cold Cathode Gauge Ignition Delay After Extended Shutdown Extended shutdowns—whether for scheduled maintenance, facility upgrades, or seasonal downtime—are common in vacuum heat-treatment furnaces, mass-spectrometer labs, and scanning electron microscope installations. When the system is brought back online, operators frequently observe longer-than-normal ignition delays on cold-cathode gauges. The VG-SM225 Cold Cathode Vacuum Gauge from Poseidon Scientific

Defining the Plateau Phenomenon in Vacuum Pump-Down During a typical vacuum pump-down cycle in systems like mass spectrometers, scanning electron microscopes, or heat-treatment furnaces, pressure initially drops exponentially as the pump evacuates bulk gas. However, engineers often observe a “plateau”—a region where the pressure decline flattens or halts temporarily, as indicated by stable readings on