They're really simple. The NZHA has the Aztec feature too which is pretty sweet.
Turn it on, remove the yellow plastic cap, pick the pilot off of the wall for the cartridge you're annealing (can be looked up on their website, there's a PC right there) and screw it in place, grab a shell holder from the drawer (or bring your own) and drop it into the little brass holder (which also on the wall), select Aztec, analyze, enter the pilot number, insert the case using the holder, analyze.
Red light will come on, it'll make some ticking noises, then turn off. The bit of brass will be trashed but it'll give you a code number. Make a note of it for future reference - it's specific to that brand of brass for that cartridge. Select use.
Then you can one by one run your brass through the machine - case in, run, wait for light to go off, case out onto cooling tray, case in, run...
Next time you don't need to analyze, because you already have the code. Turn on, insert pilot, Aztec, run, enter code, off you go.
There are videos on YouTube too.
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