The True RMS A.C. Millivoltmeter (Models ACM-102 & ACM-103) is a precision measuring instrument designed to provide accurate True RMS readings of AC voltages, regardless of waveform shape—whether sinusoidal, square, or distorted. It is ideal for laboratory, testing, and calibration environments where accurate low-level AC voltage measurement is essential.

These models employ advanced True RMS conversion circuitry, ensuring precise voltage readings over a wide frequency range and input signal types. The ACM-102 typically offers analog display functionality, while ACM-103 includes a digital readout for higher accuracy and easier monitoring.

Both models feature:

• Wide frequency response (typically from a few Hz to several MHz)

• High input impedance to avoid circuit loading

• Multiple voltage ranges (from mV to several volts)

• Shielded input and rugged metal casing for stability and noise immunity

Suitable for use in R&D labs, audio testing, signal processing, and instrument calibration scenarios, these millivoltmeters help in analyzing signal amplitudes where conventional voltmeters fall short.