File $Source: /home/juda/www/hrc_flight/RCS/man_hv_up_s.html,v $
Version $Revision: 1.3 $
Last Update $Date: 1999/05/10 18:08:08 $
HRC CCB Status Approved

OP03 Procedures op03:

HRC Command Sequences

HRC-S MCP Manual HV Ramp-up

Description:

This sequence is used to ramp the HRC-S MCP HV up from a standby level to an operational level in a series of steps. At each step the HVPS current limit is disabled, the bottom MCP HV level is set, the top MCP HV level is set, and then the current limit is enabled. The order of raising the HV is used to minimize HV gradients that might damage the MCPs. At each HV level there is a pause for the HRC science team to verify nominal healthy operation.

Cautions/Restrictions:

This sequence requires a real time contact for its entire duration.

The flight operations team should be ready to execute a sequence (HRC MCP HV Off) that will "safe" the MCP HV at any time during this sequence at the request of the HRC science team.

This sequence cannot begin until the pressure at the HRC detector housing is less than 10-5 torr. The HRC detector housing door must be open before this sequence is executed.

Flow Diagram

Delta-Time Command Mnemonic Description Cmd Field Mnemonic Data Parameter Telemetry Verifier Expected Value Notes
Wait for Science Team Approval to Proceed
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 54 2SPTBHV2 54 2SPBPAST 54 sd0336
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 43 2SPTTHV2 43 2SPTPAST 43 sd022b
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401
Verify HRC-S MCP HV Settings and Analog Monitors
Wait for Science Team Approval to Proceed
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 64 2SPTBHV2 64 2SPBPAST 64 sd0340
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 53 2SPTTHV2 53 2SPTPAST 53 sd0235
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401
Verify HRC-S MCP HV Settings and Analog Monitors
Wait for Science Team Approval to Proceed
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 74 2SPTBHV2 74 2SPBPAST 74 sd034a
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 63 2SPTTHV2 63 2SPTPAST 63 sd023f
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401
Verify HRC-S MCP HV Settings and Analog Monitors
Wait for Science Team Approval to Proceed
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 84 2SPTBHV2 84 2SPBPAST 84 sd0354
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 73 2SPTTHV2 73 2SPTPAST 73 sd0249
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401
Verify HRC-S MCP HV Settings and Analog Monitors
Wait for Science Team Approval to Proceed
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 94 2SPTBHV2 94 2SPBPAST 94 sd035e
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 83 2SPTTHV2 83 2SPTPAST 83 sd0253
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401
Verify HRC-S MCP HV Settings and Analog Monitors
Wait for Science Team Approval to Proceed
00:00:01.000 2SPCLDS Spectroscopy HVPS current limit disable     2SPCLST DISA sd0400
00:00:01.000 2SPTBHV Set spectroscopy bottom MCP HV step to 102 2SPTBHV2 102 2SPBPAST 102 sd0366
00:00:01.000 2SPTTHV Set spectroscopy top MCP HV step to 90 2SPTTHV2 90 2SPTPAST 90 sd025a
00:00:02.000 2SPCLEN Spectroscopy HVPS current limit enable     2SPCLST ENAB sd0401

$Log: man_hv_up_s.html,v $

Revision 1.3 1999/05/10 18:08:08 jhc

corrected initial time delay to 1 sec

Revision 1.2 1999/04/07 18:45:14 juda

HTML changes: added DOCTYPE and ALT reference for flow diagram - added "name" tags to sub-sequences

Revision 1.1 1999/03/03 20:13:18 juda

Initial revision

Revision 1.3 1998/05/18 15:50:14 juda

corrected telemetry verifier mnemonics for MCP HV Step commands (2SPTPST -> 2SPTPAST and 2SPBPST -> 2SPBPAST)

Revision 1.2 1998/05/12 19:17:18 juda

Changed all occurrences of "Verify HRC-S MCP HV Settings" to "Verify HRC-S MCP HV Settings and Analog Monitors" - Marked as Approved

Revision 1.1 1998/05/08 14:31:21 juda

Initial revision

Dr. Michael Juda
Harvard-Smithsonian Center for Astrophysics
60 Garden Street, Mail Stop 70
Cambridge, MA 02138, USA
Ph.: (617) 495-7062
Fax: (617) 495-7356
E-mail: mjuda@cfa.harvard.edu