## page was renamed from InstrumentControl/Vacuum
= 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) and a fore-line pump. The TMP and the fore-line pump will be operated manually and be stopped after initial pump down. So these are not under remote monitoring.

== Varian Ion Pump Controller (probably obsolete, see the Agilent one below) ==
[[attachment:VARIAN_IP.pdf|Manual]] p9 and p18

We only use J2 (D-Sub 25pin) connector. No RS422 communication.

In J2, we are mainly interested in Pin 1,2 (HV ON/OFF), 3,16 (CURRENT), and 5,18 (FAULT). Other pins are optional.

== Agilent Ion Pump Controller ==
[[attachment:4UHV_Ion_Pump_Controller_manual.pdf|Manual]]  p64 - p71

(This unit may be used instead of the Varian controller shown above)

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).

== Gamma Digitel MPC (Ion Pump Controller) ==
[[attachment:MPC_J.pdf|Manual]] p17

We will only use J104 Connector.

We will use all the setpoint relays and the analog outputs in J104.

== Convectron ==
[[attachment:Convectron_FIR_GV_PRES_3750MAN.pdf|Manual]] p12, p32

We will only use the analog output connector and the set point relays. No RS-232.

== ULVAL GI-M2 Ion Gauge ==
[[attachment:GI-M2_1.pdf|Manual 1]] (p16, p46-50), [[attachment:GI-M2_2.pdf|Manual 2]] (p1-6)

[[attachment:GI-M2_IO.pdf|I/O table]]

We will use:

 * Set Point 1 (Pin 1-3)
 * Rec out (Pin 24, 25)

Optional signals:

 * Power (Pin 6)
 * Filament (Pin 7)
 * Degas Out(Pin 10)
 * Degas In (Pin 17)
 * Local Remote In (Pin 42)
 * Filament In (Pin 43)