1 Introduction

The Outlet Measurement Unit Model OMU1-S-WW (OMU1) is a low-cost power monitor employing the Teridian 78M6612 SOC, a single-phase power and energy measurement IC supporting up to two outlets. The 78M6612 IC monitors the AC line voltages and load current. The embedded demo firmware calculates the RMS line voltage and RMS load current, Watts, VA, VAR and power factor for a single outlet. Access to real-time data in the 78M6612 is available via a serial interface to a PC using a Command Line Interface (CLI). A USB interface on the OMU1-S-WW provides the serial connection and DC power to the 78M6612.

Included with the OMU1-S-WW is a Windows based Graphical User Interface (GUI) for simplified access to the following measurement data and controls:

• Power, current, voltage and power factor indicator dials

• Adjustable display scales

• Minimum and peak parameter tracking

• Selectable strip chart display format

• Narrow-band versus wide-band measurement

• Selectable sample size averaging

• Accumulated energy usage and expense tracking

• Line frequency

• Alarm indicators

• Programmable alarm thresholds

• Data log to file

Alternatively, the user can directly query the device with the command set using HyperTerminal and the provided 6612_OMU_S2_URT_V1_13 Firmware Description Document.