Report "Hello i have a welch allyn Audioscope 3 model # 92680 i believe we have all the parts for the audiometer however were not sure how to use it and have misplaced our usermanual . i did look up on line for a user manuel and its only showing for models :71123,71126,71040, 71032,71034,,71036, 71130,71135,71170,71175 and it says "only" so were wondering if its used the same way or how can we pull up the proper manual for model 92680"