Honestly - It's not needed. I get it, I researched the hell out of these before I shot my first plates. Went as far as to try to find historical documentation for vintage plates, then converted the ancient sensitivity rating to another ancient dead rating, to another, to ISO.
The thing is -there is no need for a meter like that. Modern films, black & white or color, have gotten to the point where you have to have a catastrophic failure in metering or camera operation to screw up. Over expose or under expose by a stop with most professional films they'll take it easily.
The UV shift isn't that bad anyways, and if you read through the blog posts Jason has and the instructions he gives us to sue the plates, you'll be fine. If you mess up - well that's the process. That's actually kinda the fun with this, it's taking photography back 100+ years. You meter with charts and experience.
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