What is the accuracy of the phase angle measurement on the ION 7650?

Issue
Customer is looking for the phase angle measurement accuracy for the ION7650 device.

Product line
ION7650 Power Meter

Environment
Hardware/Specifications

Cause
Customer cannot find the accuracy of the phase angle measurement.

Resolution

The Power Harmonics Module has phase angle accuracy within (±0.5º x harmonic number); hence, the deviation may increase with higher harmonics. In addition, the Power Harmonics Module is limited to a 2 second update rate since the module is driven from the FFT modules, which have a 2 second update time.