Startup of TPC gas system after summer shutdown

This procedure brings the TPC gas system to a ready state after the long
summer shutdown. During the shutdown power to all racks is off and the
TPC is continuously purged with N2 through the analog flowmeter FI5.
This procedure will power all racks, boot the control computer, turn on
all meters (O2, H2O, CH4 etc) and start the small compressors.

1.  Make sure the circuit breakers on top of Racks 2, 3, and 4 are on.
    Turn them on if they are off - use appropriate PPE.

2.  Push the green button on the TPC interlock panel (Rack 4) labeled
    "Gas System Power".

3.  Check that the red LED on the solid state relay mounted on the wall
    between Racks 2 and 3 is on - this supplies the power to Rack 2.

4.  Turn on the CAI methane meter M3a (Rack 3)

5.  Turn on the two Illinois Oxygen meters M5 and M1 (AC switch on the
    back of each meter inside Rack 3)

6.  Open the exhaust valve for M1 and M5 (mounted on the back of the
    meter)

7.  Crack open the input valve on M1 and M5 ¼ turn (mounted on the back
    of the meter.)

8.  Plug in the small compressor SC3 (located inside Rack 3) (Supplies
    flow to M5)

9.  Adjust the flow on M5 by turning the input valve - set flow to be
    between 0.1 and 0.2 lpm.

10. Turn on the CAI methane meter M4 (top of Rack 2)

11. Confirm that there is N2 flowing to the TPC through FI5 (Rack 2) -
    adjust to the arrow if needed.

12. Turn on the lower hardware alarm box (Rack 1). The AC switch is on
    the back of the box.

13. Turn on the power for the SCXI input/output crate (Inside Rack 1)

14. Turn on the power for the temperature controller MUX box (Inside
    Rack 1). AC switch is on top of the box.

15. Turn on the power for the three Hastings mass flow controllers (Rack
    1). The AC on is a rotary dial on each controller.

16. Plug in the water meter M2 (inside Rack 1)

17. Turn on the control computer and monitor and allow it to boot up.

18. Log into the control computer and start the gas system control
    program - double click on the icon labeled "Star_New".

19. Using the control program close SV12 if it is open. (Closed = red)

20. Open SV13 (open = green). This is the inlet valve for the small
    compressor SC1

21. Open SV6,SV7, SV8, SV17

22. Using the control program, start Small Compressor 1 (SC1) and Small
    Compressor 2 (SC2).

23. Check the output pressure for SC1 on PI2 (Rack2). Adjust the
    pressure to be between the marks using the bypass valve MV16

24. Check the output pressure for SC2 on PI8a (back of Rack 2). Adjust
    the pressure to be on the indicator line using the bypass valve
    MV17.

25. Check the flow for M2 on FI3 (back of rack 2). See the checklist for
    flow range.

26. Check the flow for M4 on FI2a (front of Rack 2) and adjust if
    needed.

27. Check the flow for M3a on FI4 (front of Rack 3) and adjust if
    needed.

28. Adjust the flow for M1 Oxygen meter by turning the input valve for
    M1 (inside Rack 3) - set the flow between the marks on FI2. (This is
    very sensitive!)

> This next section starts the meters and pump for the gap gas (N2):

During the summer shutdown, \~ 10 lpm N2 goes to the gap through FI10
(Rack 3).

1.  At Rack 4, open MV52 and close MV54 - this path selects fresh gas
    for the meters.

2.  Plug in M7 (H2O) (inside Rack 4) and turn on M6 (O2) (AC switch on
    back of the meter.)

3.  Check that FI10 (Rack 3) reads \~ 10 lpm.

4.  Turn on the sample pump (switch on the control panel in Rack 4)

5.  Check the sample flow (FI55) - it should be \~ 2 lpm.

6.  Let the meters warm up for a few hours.

7.  Open MV52 and close MV54 - this will sample the return gas from the
    gap.

8.  After a few hours, check the meters readings. H2O \< 10ppm, O2 \< 20
    ppm.

If this startup is in preparation for a new run, then you can also do
the following steps:

1.  If Leonid has already regenerated the purifier and dryer and the run
    will start in a week or so then turn the Purifier on using the
    computer control, The purifier will come on and heat up to the set
    point (\~ 210 degrees C). Check after a few hours that it is
    regulating at this setpoint. For normal running the dryer is OFF.

2.  Check that the computer data is being written out to slow controls.
    In the lower task bar (right side) find and left click on the icon
    "EPICS communicator". If the data is being successfully written you
    should see the message "Data saved to files" with a date and time
    stamp. The box next to "File writing to" should be checked and the
    path should be
    [\\\\sc.starp.bnl.gov\\gas_sys_data\\](../../../../../../../../gas_sys_data/)
    The box labeled "Direct connection to Epics channels" should NOT be
    checked. This process writes the gas system data to SC. You should
    also check the gas system GUI on CHAPLIN (accessible from the Top
    Level GUI) - the data should be refreshed every \~ 1 minute. If the
    data is not being written to SC or is not being updated on the GUI
    contact Wayne Betts and a slow controls expert. Also see page 148 in
    the gas system logbook.

3.  If this is the start of a new run you also need to create a new
    local database on the gas system control PC. In the task bar (lower
    right) left click on "dbwriter". You should see the message "Data
    saved to database" with a date and time stamp. Click on the "Create
    New Database" button and create a new database identified by the
    year's run number (currently Run8). Close the window. Then from the
    desktop open the program dBviewer and click on "Change database".
    Select the new database that you just created (should be in the
    folder "databases"). After a few minutes , check that the dBviewer
    program is displaying data from the new database (i.e. there should
    not be any data before the current day.)