MDM Trouble Report for 2002 May 23

Telescope: 2.4m
Observer(s): Vestergaard (OSU)
Instrument: CCDS

Problem(s) Encountered:
At 9pm (UT4) as I was starting the night suddenly PROSPERO
beeped a warning while idle that the Head Electronics failed
and was disabled. However, it came right back up again after
I ran SEQINIT on the IC computer. It worked all night after
that with a single momentary glitz around 4am (UT11) when
on finishing an integration the `CountDown' counter went to
a large value instead of going to zero. It sat there for
several seconds (10+) and then recovered and read out the
detector.
After the HE went down (and came up) the next long exposure
was set to 900secs but the instrument controler stopped the
integration after some 350secs. It was cleared (it seemed)
by running `startup' in PROSPERO.
	Things went fine until 4:25am. On readout the electronics
failed and aborted. I tried running `seqinit' on IC again, but
realized that I had to run `istatus' first in PROSPERO (which
I had done the first time I had problems) in order for the
electronics to come back up. However not for long. Half hour
later the PROSPERO beeped a warning that  the Head Electronics
had failed and was disabled. This time around none of the
tricks that worked earlier did any good. I also tried turning
off the power to the head electronics box for a while, and 
then running `seqinit' on IC, which helped the other night. But
not this time around. I was trying to revive it as I needed
additional calibration data. However, now almost two hours 
later, I still haven't managed, and I give up.

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Submitted on 2002 May 24 [5:58:50]