Vacuum system control
Vacuum Unit
Vacuum unit (VU) is a set of vacuum pumps and gauges. KAGRA has a vacuum unit every 100m. So the total number of VUs is 60.
Each VU has ion-pumps, an ion-gauge,a convectron, a turbo molecular pump (TMP), a fore-line pump. The TMP and the fore-line pump will be stoped after initial pump down. So these are not under remote monitoring.
Agilent Ion Pump
Manual p64 - p71
We will use the J1-REMOTE I/O connector. We will not use the serial communication.
Used pins: Ch1 On/Off (Pin 6, Pin 22), Fault Relay (Pin 12 or 13, Pin 31), Ch1 Set Point Relay (Pin 17 or 19, Pin 18), Analog 1 (Pin 1, Pin 3).