File $Source: /home/juda/www/hrc_flight/contingency/RCS/plusy_failsafe.html,v $
Version $Revision: 1.3 $
Last Update $Date: 1999/03/03 21:57:33 $
HRC CCB Status Approved

OP03 Procedures op03:

HRC Contingency Procedures

+Y Shutter Fail Safe

Description:

This procedure is used to fire the HRC +Y shutter failsafe. The only commanding required is the command sequence that fires the +Y shutter failsafe.

Note: If the +Y shutter has been the shutter selected for blocking the zeroth order image when using the transmission gratings, then the HRC_MODE ODE for zero blocking must be changed to use the -Y shutter.

Procedure Trigger:

This procedure is a measure of last resort. If, after using all possible combinations of power configuration, the +Y shutter sticks in a position that blocks either of the HRC detectors and the Flight Director approves its use, the Flight Operations Team will execute this procedure with support from the Science Operations Team.

Procedure

$Log: plusy_failsafe.html,v $

Revision 1.3 1999/03/03 21:57:33 juda

changed links for files with name changes

Revision 1.2 1998/11/18 15:43:55 juda

removed commands that power down the HRC - added update HRC_MODE ODE to procedure steps

Revision 1.1 1998/11/04 13:59:59 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