Data Acquisition & Logging

The ALTA wireless AC Current Meter measures the RMS current of an alternating current (AC) system using a current transformer (CT) that wraps around the “hot” wire of a two wire (hot, common, ground(optional)) power system. The sensor reports Minimum RMS current, maximum RMS current, average RMS current, and amp hours to the iMonnit system. The iMonnit system is capable of generating watt hour or kilowatt hour readings as well.

• Measures amp hours, max RMS current, min RMS current, and average RMS current

• Two different current transducers available:

• Low Current: 0-20 amp

• High Current: 0-150 amp

• Capable of generating watt hour or kilowatt hour readings using iMonnit

• Data logging for accumulated amp hour readings

• Can notify based on current levels or changes in current levels

• Simple and safe installation of current/power measurement hardware, no rewiring required

Principle of Operation

To measure current, clip the CT around only a single wire of the AC system (clipping around a hot and neutral wire at the same time will result in 0 current readings). After the sensor powers on and connects to the gateway, it will begin taking measurements based on the averaging interval (5 seconds default). It will report data to iMonnit every heartbeat or if the current goes outside of the aware thresholds set in iMonnit. The sensor reports amp hours, max RMS current, min RMS current, and average RMS current. iMonnit can also generate watt hour or kilowatt hour readings if a default RMS voltage is set in iMonnit.