Technician's lingo form Yiddish word "putz" dick
To change or alter something haphazardly in order to observe a result. Often done with no significant goal in mind and as a form of wasting time. Interchangeable with "dick around".
Someone who putz's with equipment on a regular basis instead of contributing a in useful manner may be called a putz monkey
Work gave me an old sever to putz with.