Speech alarm and cycle helium gas monitoring of helium refrigerator

Two helium liquefiers are running round-the-clock in parallel. One of them is always connected to the Superconducting Cyclotron in refrigeration mode. EPICS based alarm system is running with alert sound in computer speaker. But the fault cannot be located without opening the fault screen. An audible English speech alarm system was envisaged and implemented in EPICS platform. Voice message are now being played in relation to faults or alarms. In continuously operating refrigeration system pure helium gas inventory is an important parameter to log. We need to calculate total pure equivalent helium cycle inventory. Now, we have put these calculations together in EPICS controller. This continuously calculates displays and archives the pure equivalent cycle helium gas. If any leak develops in the process, this trend gives a quick indication.