Fortunately, that's now an easy problem to solve: http://astore.amazon.com/poolbooks?node=24 . I've been using the MasTech meter shown for about 9 months now, and have been very pleased.
I'm going to be gradually expanding the PoolForum "A-store", since it gives me a way to respond more helpfully and directly to questions like these. I just added some books that are relevant, and well-rated on Amazon.
I also found this video, http://www.youtube.com/watch?v=B2p8L-f8kyc
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