Aim tti 1908 series high performance benchportable multimeter 5frac12 digit aim tti 1908p the 1908p is a bench or rack mounting digital multimeter that is designed for serious use by professionals and is at home in the laboratory workshop or classroom as well as in the field the dmm has functions and features that have been chosen to provide real value and it will carry out a range of measurements including ac and dc voltage dc current and true rms ac current resistance frequency