[evlatests] [Evla-eng] Maint Form C118598

[Jim Jackson]

Thanks Tom,  Sorry for the confusion this morning.  When I left the meeting 
for a minute, Rob informed me that they caused the problems with the 48VDC 
system while checking a battery problem just after lunch yesterday.

It also just occurred to me that we sent Jerry and Tom out to the antenna 
to reset a synthesizer module after op's told us it was not responding. 
That was right before we left the site and I assume that is when it was 
left locked out.

Cheers,
Jim



At 09:00 AM 7/20/2006, Tom Frost wrote:

>Antenna #13 was written up for all 4 motors faulted this
>AM....they were indeed faulted when I got there...
>
>there was some speculation raised in the AM meeting about
>power problems on #13..my 1st thought was the motor
>faults could be related to "bad power"...we have access
>to a brand new "power line disturbance monitor" that
>could be installed in #13 if you think it's worth the
>effort...
>
>however, the motor faults were *not* caused by bad power...
>the last person on the antenna yesterday had left the Servo
>Lock-out switch in the OFF position...the motors faulted
>just like they are designed to when OPS tried to point the
>antenna...
>
>--
>
>Tom Frost
>Technical Specialist II
>National Radio Astronomy Observatory
>VLA Site--Plains of San Augustin
>New Mexico, USA
>
>
>
>
>
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