MDM Trouble Report for 2006 Oct 10

Telescope: 2.4m
Observer(s): Prieto & Eastman (OSU)
Instrument: CCDS

Problem(s) Encountered:
We tried to test out the new 50 l/mm grating. After struggling 
to identify some of the lines for about an hour, we issued a 
command  center -1000 , which made prospero freeze. We power 
cycled the IE, and issued a seqinit command on the IC to get 
it running again. Upon restarting, we reentered the grooves 
and order, but instead of issuing  newcenter 0  we accidentally
issued  center 0 , with the wavelength undefined. This 
caused the number in brackets next to the number of motor 
steps to 0 (ie GratTilt 51000 [0.00], instead of issuing 
an error. After this, we struggled to find the zeroth order, 
and tried the  grattilt reset  command to go back to the 
hardware limits, as in the written documentation, but the 
command wasn't recognized. We did a help through Prospero, 
and determined that the command should have been 
 grtilt reset , but that gave the following error:

pr> grtilt reset
 PROGRAMMING ERROR (setdevice): UNRECOGNIZED
 COMMAND: GRTILT
 Execution error in Prospero command.
 Command: grtilt reset

After manually scanning, we found the zero point, but the 
number in brackets changed (it used to be -6.11, and now 
it's more like -7.5). By this point, the sun was setting, 
so we decided not to waste more time trying to calibrate the 
50 l/mm grating, and swapped it back to the 150 l/mm grating, 
which worked fine.

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

Submitted on 2006 Oct 11 [6:17:55]