The emphasizes that the meter uses True RMS for accurate AC measurements on non-sinusoidal waveforms (e.g., VFDs, switch-mode power supplies). For pure sine waves, standard meters work, but for distorted signals, True RMS is essential. The manual specifies an accuracy of ±1.2% for 50/60Hz and ±3% for 40Hz–1kHz.
A fault has occurred. Common causes include: Overvoltage: Input voltage exceeds 50V. Undervoltage: Input voltage drops below 18V. Overcurrent: The motor is stalled or the load is too heavy. zm-7205a manual
"Okay, Manual," Elias said, reading the page. "Let's see what happens at Setting 1: 'Maintenance Mode'." The emphasizes that the meter uses True RMS
Compatible with AC 70V to 230V (nominally 80V to 220V). standard meters work
