Stable Isotope Geochemistry


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John Hill <[log in to unmask]>
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Stable Isotope Geochemistry <[log in to unmask]>
Mon, 12 Oct 2009 10:28:35 +0100
text/plain (42 lines)

Try MASCOM in Bremen as they repair electronic boards including power 
supplies for Thermo anyway.


Brian N. Popp wrote:
> The transformer on the A2 Power Supply on our MAT 252 has failed. The 
> MAT 252 is now considered obsolete by Thermo Fisher (and will likely be 
> retired next year) so replacement parts and support are offered on a 
> best effort basis - if they have the parts, they will be sold to users. 
> This is understandable for a 20 year old instrument. Thermo Fisher US is 
> contacting Bremen about availability of this power supply, but I thought 
> I would ask the isotope community if anyone has experience repairing the 
> A2 power supply. The transformer in the A2 power supply on our Delta S 
> has the same part number as that in the MAT 252 so it looks like the 
> power supplies are interchangeable - I suspect they are also the same on 
> the Delta Plus.
> I checked the ISOGEOCHEM archives and cannot find reports of problems 
> with this power supply. Does anyone have experience with this power 
> supply and how was that problem resolved? In particular, are there 
> companies that have experience repairing these units? Might anyone have 
> a spare A2 Power Supply they are willing to sell us?
> Our University electronics shop has indicated that they can replace the 
> single original transformer with 5 separate transformers to supply 
> voltage for each of the 5 circuits that provide +/-15 and +/- 23 volts 
> to the Trap, DAC, ADC, SARE and motor (bellows). However I was hoping 
> for an easier solution to this problem.
> Thanks in advance for any help you can provide.
> Brian