Phil,

Whatever system you use for evaluating exposure with AZO should work fine with kallitype. The main issue is that the paper you use to test exposure should be coated in the same way you coat the paper used for the final print. In other words, adjust the amount of sensitizer to give the same ratio for the small and large print, and try to be as consistent as possible in the way you coat.

I work with a 50 watt yellow bug light when coating, dry the sensitized paper in the dark, and turn on full room lights about 15 seconds after the print is in the developer.

However, you will not be able to judge exposure until after the print is fully processed and dry. Dry down is very significant with kallitype. And if you plan to tone the final print, as you really should for permanence, you need to also tone the test print.