Enable the RS232 communication on a Digital Multimeter - Code Inside Out
How to Use a Multimeter for Electronics Projects
UNI-T UT61E UT61 Series Digital Multimeter PC Data Connect AC DC Voltage Current Tester - YouTube
Tekpower TP4000ZC PC Based USB Interfaced Auto Ranging Digital Multimeter, MS8220R Alike, Computer DMM: Computer Multimeter: Amazon.com: Tools & Home Improvement