Good Morning, Sean,
Generally, a fairly precise temperature is required only when mounting RC materials. Absent the commercial temperature-measuring test strips, you can establish a correct setting by using a series of waste B & W RC paper strips. Start with what you think is a correct temperature setting; if the RC paper shows no melting (usually a little surface glazing) at the first setting, raise the temperature in five or ten degree increments and repeat with new scraps of RC paper until you start to get melting. Then just back off a bit, mark the setting, and you should be good to go. Naturally, these tests should be done with release paper to prevent anything from sticking to the platen.
It has been my experience that mounting fiber paper is not very temperature-critical. As long as the press is hot enough to activate the mounting tissue, it shouldn't matter much if it's accidentally set somewhat hotter.