Southwire AECM200206 Electra Check Digital Line Monitor RMS Voltage & Frequency Meter

The Southwire AECM200206 Electra Check Digital Line Monitor is a compact, plug-in AC power quality monitor built with advanced microelectronics for accurate testing and monitoring of all 120V AC power sources. It plugs directly into a standard 120V/15A outlet and is ideal for use with power lines, campground pedestals, generators, inverters, and Uninterruptible Power Supply (UPS) systems.

Voltage is measured as True RMS, the only method capable of accurately measuring all AC waveforms — including modified sine waves produced by solid-state generators and inverters — making it far more precise than a simple AC average measurement.

Key Features:

• RMS Voltage & Frequency Metering — Displays true RMS line voltage and line frequency in Hz; monitor alternates between readings or locks to voltage-only or frequency-only mode
• 3 Display Modes — Alternating Voltage & Frequency, Voltage Only, and Frequency Only; both values are continuously monitored regardless of display mode
• LED-Backlit LCD Display — Clear digital readout visible in low-light conditions
• Wiring Diagnostics — Tests for and indicates open ground, open neutral, and correct polarity
• Voltage Alarm Thresholds — Over-voltage alarm triggers above 135V AC RMS; under-voltage alarm triggers below 102V AC RMS
• Frequency Alarm Thresholds — Over-frequency alarm triggers above 65 Hz; under-frequency alarm triggers below 55 Hz
• Multi-Tone Fault Alarm — Audible alerts notify users of power problems without requiring constant attention
• Hands-Free Auto Reset — Automatically resets when power conditions return to normal
• One-Button Operation — Simple single-button control for display mode selection
• Surge Protection — Built-in surge protection for added safety
• Compact & Rugged — Small form factor allows permanent outlet installation or use as a portable service tool
• Operating Temperature — Rated for use from +32°F to +125°F
• Voltage Range — Monitors 85 to 150V AC RMS
• Frequency Range — 40/80 Hz
• Operating Current — 0.02 Amp draw

Also sold under the Surge Guard brand by Southwire and supersedes earlier TRC model number AECM20020. Backed by a limited 1-year manufacturer warranty. UPC: 024098200203.