[RASMB] Diagnose the error message

[Tom Laue]

Hi Mark-
The 12948684800 diagnostic message value seems bogus, suggesting that 
there may have been a communications error between the XLI and the 
computer. I can almost hear the conversation now:
Computer program:     12948684800 (a garbled attempt to say "Send 
current settings")
XLI:                            DIAGNOSTIC  12948684800 RECEIVED
                                  What?
Computer program:     I said- 12948684800
XLI:                            DIAGNOSTIC  12948684800 RECEIVED
                                  What
Computer program:     I said- 12948684800
etc.
I have had similar conversations with students. I won't say which side 
is mine...
Tom

Virgil Schirf wrote:
> Hi Mark,
>
> Do you have any vacuum issues as well as temperature issues? We have 
> seen temperature fluctuations if there a problem with the vacuum 
> system thus causing both the vacuum pump and thermal electric modules 
> to work harder. The temperature should remain steady within ±0.5°C on 
> an instrument that has been allowed to temperature equilibrate (both 
> the rotor and the samples) and the vacuum to reach ~ 0 microns before 
> starting. I agree with Barbara that cooling the rotor in a fridge for 
> lower temperature velocity runs is a good idea and lessens the strain 
> on the cooling system of the XL/I.
>
> Cheers,
>
> Virgil
>
> Mark Agacan wrote:
>> Hello,
>>
>> My XL-I was running overnight at 10 degrees C, at some point in the
>> experiment an error was received:
>>
>> DIAGNOSTIC  12948684800 RECEIVED
>>
>> The entire roll of print-out paper in the XL-I spewed out with the above
>> error message to form a pile roughly the size of the XL-I itself.  I
>> checked the troubleshooting section in the manual, an error message
>> starting with a 1 implies a 'CPU-Microprocessor malfunction or loss of
>> program memory'-type error.
>>
>> The XL-I worked fine the next day but I was working at 16 degrees C. 
>> Could temperature be the cause of the above error message.  We have had
>> problems with big temperature fluctuations recently, the XL-I motor
>> seems to generate a lot of heat, with the result that i have to keep the
>> lab door open to keep the experiment at a stable temperature.  For
>> example, it took around twice as long (> 5 hours) for the XL-I to fully
>> thermally equilibrate at 10 C as it did for 16 C.
>>
>> Does anyone have any knowledge of the above error, or has anyone had
>> serious issues with the temperature stability of an XL-I?
>>
>> Cheers,
>>
>> Mark
>>
>>
>> _____________________________________
>> Dr Mark Agacan
>> Scientific Officer,
>> Division of Biological Chemistry and Drug Discovery,
>> Wellcome Trust Biocentre,
>> College of Life Sciences,
>> Dow St., University of Dundee,
>> Dundee, DD1 5EH
>> Tel: +44 1382 388751
>> Fax: +44 1382 345764
>> _____________________________________
>> _______________________________________________
>> RASMB mailing list
>> RASMB at rasmb.bbri.org
>> http://rasmb.bbri.org/mailman/listinfo/rasmb
>>
>>   
>
>

-- 
Department of Biochemistry and Molecular Biology
University of New Hampshire
Durham, NH 03824-3544
Phone: 603-862-2459
FAX:   603-862-0031
E-mail: Tom.Laue at unh.edu
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