File uvcs_sheet2.txt -- Last modified Mon Aug 28 13:06:21 1995


                   COMMISSIONING PHASE BLOCK SHEET

1. INSTRUMENT AND BLOCK NUMBER: UVCS, Block 2

2. BLOCK IDENTIFICATION: UVCS Outgassing

3. PURPOSE: Prepare for optimal outgassing, and outgas

4. SUB-BLOCKS: (see Note 1)
   NR.   IDENTIFICATION
   2.1    Prepare outgassing, partially open door
   2.2    Adjust Heaters
   2.3    Adjust Heaters
   2.4    Complete outgassing, re-adjust heaters

5. SUB-BLOCKS TABLE: (see Note 2)
   NR. - DURATION - PREVIOUS - COMMANDING - TELEMETRY - POINTING
   2.1    1:30       Nom.        NRT-d         H          None
   2.2    0:15       Nom.        NRT-d         H          None
   2.3 (1)0:15       Nom.        NRT-d         H          None
   2.4    0:30       Nom.        NRT-d         H          None

   (1) To be repeated daily from 2.2 to 2.4

6. SCHEDULING REQUIREMENTS: (see Note 3)
   2.2 preferably in same contact time, about 5:00 hours later than 2.1
   2.4 3 weeks after 2.2 (23 days with some flexibility: 20-27 days)
   2.3 to be repeated daily between 2.2 and 2.4. Outgassing may be 
   interrupted by SVM operations such as MCC2; in that case close door 
   (0:30) and re-open afterwards (0:30). No adjustments with door closed.

7. SPECIAL REQUIREMENTS: (see Note 4)
   None

8. SUCCESS CRITERIA AND/OR EXPECTED OUTPUT:
   UVCS completely outgassed, HK normal.

9. RELEVANT PROCEDURES
   None (?)

10. CROSS-REFERENCE TO TEST SHEETS: (list identifiers for test sheets)

11. RELEVANT SECTION OF TIMELINE

BLOCK2 -- UVCS OUTGASSING 

;    Outgassing period (takes about 3 weeks)


BLOCK2.1 -- START OUTGASSING - PARTIALLY OPEN DOOR 

     12 & 10:00 # Both (TBD) LYA/OVI detectors ON # (HV OFF); 1:00, NRT-d
;               # For better outgassing. Monitor XDLs temperature 

     12 & 11:00 # Partially open door # UVCS already in diagn. mode; 0:30, NRT-d


BLOCK2.2 -- ADJUST HEATERS

     12 & 18:50 # Adjust htr. setpoints # to further increase temp.; 0:15, NRT-d

;    Note: During the outgassing period, the MOM and Grating heaters should always
;    ----  be on in order to prevent condensation of contaminats on the optics.

     12 & 19:00 # Monitor temperatures # If necessary, adjust heaters; NRT-s

     12 & 19:05 # Start outgassing period # 3 weeks; NRT-s

;    From day 13 to day 17 the heaters may need to be adjusted on a contingency base 

     13 & 18:50 # Adjust htr. setpoints # to further increase temp.; 0:15, NRT-d

     13 & 19:00 # Monitor temperatures # If necessary, adjust heaters; NRT-s

     14 & 18:50 # Adjust htr. setpoints # to further increase temp.; 0:15, NRT-d

     14 & 19:00 # Monitor temperatures # If necessary, adjust heaters; NRT-s

     15 & 18:50 # Adjust htr. setpoints # to further increase temp.; 0:15, NRT-d

     15 & 19:00 # Monitor temperatures # If necessary, adjust heaters; NRT-s

     16 & 18:50 # Adjust htr. setpoints # to further increase temp.; 0:15, NRT-d

     16 & 19:00 # Monitor temperatures # If necessary, adjust heaters; NRT-s

     17 & 18:50 # Adjust htr. setpoints # to further increase temp.; 0:15, NRT-d

     17 & 19:00 # Monitor temperatures # If necessary, adjust heaters; NRT-s


BLOCK2.3 -- INTERRUPT OUTGASSING - CLOSE DOOR

     18 & 17:10 # Both LYA/OVI detectors OFF (TBD) # 0:10, NRT-d

     18 & 17:30 # Close door # 0:20, NRT-d

     19 & 00:00 # Start no P/L operations # S/C MCC2 


BLOCK2.4 -- PARTIALLY OPEN DOOR - COMPLETE OUTGASSING

     20 & 00:00 # End no P/L operations # S/C MCC2 

     21 & 09:00 # Both (TBD) LYA/OVI detectors ON # (HV OFF); 0:10, NRT-d
;               # For better outgassing. Monitor XDLs temperature 

     21 & 09:10 # Partially open door # 0:20, NRT-d

;    From day 22 to day 35, it would be desirable to have 15-min NRT-d every
;    day, in order to be able to adjust the heaters on a contingency base 

     35 & 00:00 # End outgassing period # adjust htrs to nominal level