Do I need True RMS?

True RMS matters when you're measuring non-linear loads such as VFDs, switching power supplies, LED drivers, and modern HVAC equipment. Reviewers on r/ElectricalEngineering explicitly flag that the Fluke 17B+ lacks True RMS, while the Fluke 117 and 87V include it. For pure DC bench work or simple resistive AC loads, non-TRMS is acceptable.