On Thu, 15 May 2008 13:52:37 +0100, Invisible <voi### [at] devnull> wrote:

>Stephen wrote:
>
>> Is the equipment and software certified? Because that adds to the
>> cost. 
>
>Not by the supplier, I don't *think*. Certainly *we* will be regularly 
>checking it against an ISO standards-certified reference instrument 
>[which really *is* insanely expensive]. But I don't *think* the 
>suppliers actually provide any such guarantees - I'm not sure...

Buy the cheapest and that is what you get. And is your secondary
calibrator regularly checked against a primary calibrator?
-- 

Regards
     Stephen

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