Created Sep. 02 1999
  Updated Oct. 16 2001  
  Document created by S.Chekanov (chekanov@mail.desy.de)
  This document can be found in:
  http://www.desy.de/~chekanov/bpres.html  (What to do When)



                   What to do When for BPRES

               ################################### 
                 (if the experts are unreachable)
               #################################### 

  Generally, problems with BPRES are difficult to fix
  for non-experts, so contact imidiatly the experts 
  if something goes wrong. However, if the problem
  is related to DQM Browser, it can be fixed by 
  the shift crew:
 

               ----------------------------
               BPRES Messages on DQM Browser
               -----------------------------               


  If you see that something  goes wrong with  BPRES on DQM 
  Browser, first of all go to the BPRES DQM home page:

  http://www.desy.de/~chekanov/bpres/bpres_report.html
 

  and check BPRES histograms. BPRES Histograms should be
  filled and time on html home page should be correct 
  (+/- 30 min). 
  Note that histograms might be not filled if you 
  do not take data or you  have started a new run 
  (<20 min).
 

  1) If you see  yellow BPRES box "TLT BPRES
     histograms are not available" on DQM Browser,
     this is not a serious   problem. This happens
     if the previous run was not successful and TLT
     histograms are not filled for that run. 
     This message will disappear after 
     some time (most likely for the next run).
 

  2) If BPRES DQM is not updated, then, most likely, 
     BPRES DQM process  has stopped. 
 
     Check http://www-cdaq.desy.de/~bpres/
     The date on this page most likely was not updated
     for some time (the date should be in range +/- 30 min). 

     To restart DQM, do the following:

       a) login on "contlt" user name : "shiftcrew"
                            password  : "... _ ..._..."

       c) ps -u shiftcrew <enter>

          This gives you list of the active
          processes.  There should be two BPRES processes: 

          1) bpres.sle
          2) sleep
            
          If you do not see them, you need to restart
          BPRES DQM.  Do the following on "contlt" computer: 

            1) cd        <enter> 
            2) cd bpres  <enter>  
            3) cd dqm    <enter>  
            4) run_dqm   <enter> 
            5) logout    <enter>

     Check http://www-cdaq.desy.de/~bpres/
     The date on this page  should be OK.

     To check the BPRES status, go to 
     http://www-cdaq.desy.de/~bpres/dqm/bpres.dqm

     You will see the current status.   

  
  3) If you see RED BPRES box on DQM and message
     like ".. too  low signals", do the
     following:

     1) Go To http://www-cdaq.desy.de/~bpres/

     2) Check histograms.  

        If you see that there are some random
        non-filled channels (in total -416 channels), 
        then this is most likely related to the 
        quality of the data taking. 
        Send an email to BPRES experts.

        If you will see very big holes with empty
        channels (>100), call to experts and send
        email. This is a serious problem.   


------------------------------------------------------
-----------------------------------------------------

                 ------------------- 
                 HV RELATED PROBLEMS 
                 ------------------- 




              How To Set HV for BPRES PMTs
              ---------------------------- 


  For example, if the power is  OFF  in the hall,
  experts should set the HV on PMT. However, if there is
  no any hope to find experts in the near future,
  try to set the HV yourself.  

        1. How to set the HV on (if everything is OFF)
        ----------------------------------------------

 a) Make sure that the low voltage on the 6th  floor
    is ON. Look at "hc3control", user: public and then
    print "sh_b_hv". You should see that the voltage on 
    units 21,22,23,24 should be on. These units are usually
    always on since they are used for BCAL.      

 b) Now you can set the HV on the BPRES. Go to Ruckzack (2 floor)
    and find B2 04 and B2 05 Racks. Turn the CAMAC crate ON (if
    it is OFF). The crate is on if    
    you will see an yellow light above the CAMAC switch).

    Then switch the PC on (bottom "power" on PC 
    and a bottom on the monitor).
    You will be asked to push any bottom and to print
    the  password ("ZEUS").

 c) Go to "Program Manager - [ZEUS]" (2 clicks on the icon).
    Go to "File Manager" (2 clicks on the icon).
    Go to C:\OODA\SETDAC  directory (2 clicks). 
    There are 6 exe files there: 

    dac11.exe, dac13.exe, dac2.exe, dac20.exe
    dac22.exe, dac4.exe.

 d) Click 2 times on "dac11.exe". You will be asked "Is HV on ?".
    Say "No". You will get a window with HV set for each
    individual PMT.
    Click on "Set ON" and wait for 5 sec. Then "Exit".
    Do the same with each exe file: from "dac13.exe" to  "dac4.exe".
    At the end, you will set all HV.

 f) You should be sure that you REALLY set the HV on PMTs. For this,
    go to C:\OODA\WW_READ using "File Manager".
    There are 6 exe files: from "ww1.exe" to  "ww6.exe". 
    Click 2 times on "ww1.exe". You will be asked: "Is HV on".
    Now you should say "Yes". Then you will get a big window.
    Press a bottom "Read MUX" and wait for 5 sec. You will see
    the numbers which are read-back from PMTs. They should
    be around 1000 Volts (+/-200, for a particular gain
    and calibrations) 
    Do the same with each exe file, from ww2.exe to ww6.exe
    (in order !!). At the end, the program will make a fresh file 
     "date".d you can look at it.   
  
  
          2. How to set the HV off (before the access!)
          ---------------------------------------------

   You should remember that it is very bad if the power on 6 floor
   is off, but PC from Ruckzack still sets the HV. Before
   switching the low voltage  from 6 floor, switch the HV off !

  a) Go to Ruckzack (2 floor)
     and find B2 04 and B2 05 racks. Find BPRES PC
 
  b) Go to "Program Manager - [ZEUS]" (2 clicks on the icon).
     Go to "File Manager" (2 clicks on the icon).
     Go to C:\OODA\SETDAC  directory (2 clicks)
     There will be 6 exe files there: 
     dac11.exe, dac13.exe, dac2.exe, dac20.exe
     dac22.exe, dac4.exe.
 
  c) Click 2 times on "dac11.exe". You will be asked "Is HV on".
     Say "Yes". You will get a  window with the HV settings.
     Click on "Set off" and wait for 5 sec. Then "Exit".
     Then do the same with each exe file: dac13.exe - dac4.exe.
     At the end, you will set all HV.

  d) You should be sure that you indeed set the HV on PMTs. For this,
     go to C:\OODA\WW_READ using "File Manager".
     There are 6 exe files: "ww1.exe" .. "ww6.exe".
     Click 2 times on "ww1.exe". You will be asked: "Is HV on".
     Now you should say "Yes". Then you will get a window.
     Press a bottom "Read MUX" and wait for 5 sec. You will see
     numbers which are read-back from PMTs.
     Do the same with each exe file, from ww2.exe to ww6.exe
     (in order !!). At the end, the program will make a fresh file
     "date".d you can look at it. The HV should be < 50 Volts.
  

         3.  In case if DESY lost power
         ------------------------------

     Of course, in this case Ruckzack will go off.
     In this case you have to switch on B2 04 and B2 05 racks,
     and do everything as described in 
     '1. How to set the HV on'