I know there are real experts out there who are going to jump all over me for this. But I was taught by a bunch of old lab rats who did down and dirty production printing without a whole lot of analyzers, timers, etc. etc. They learned their craft in the 1930s and 1940s and taught me in the 1960s.
Put your negative strip in the carrier with a stripe of the clear film between frames in the center of the easel.
Stop your enlarger lens down to f11.
Make a test strip of the clear film, using three second intervals.
Develop the strip normally; fix. Wash. Dry.
Now find the first exposure patch that is as black as the remainder. That is your baseline exposure. Any part of your actual negative which is clear film will print as black in your print. Make the exposure of your neg at that time and f stop and let us know what you see. KISS.