User's Guide
Table Of Contents
- Table of Contents
- 1 - Introduction
- 2 - Safety Guidelines
- 3 - Regulatory Guidelines
- 4 - Product Specifications
- 5 - Features
- 6 - Inside the Meter
- 7 - Inspecting the Site for Anomalies
- 8 - Installing the Meter
- 9 - Testing NIC Communications in the Field
- 10 - Updates and Repairs
- Index
30 A c l a r a R F E l e c t r i c I - 2 1 0 + c U s e r G u i d e
Supported Messages
Phase detection surveys begin at the headend as depicted in the following image.
Figure 5.11
Phase Detection Messages
The headend will generate a unique ID number for each survey at each DCU. It
will send the survey (beacon) command to the DCU for broadcast to all radios
within range. The NICs within the meters will use the phase detect message
broadcast to trigger a time measurement between the arrival of the message until
the next voltage zero cross. This measurement, called phase delay, is reported back
to the headend. A meter will likely hear multiple phase detect beacon messages
from different DCUs all within the same survey period. The NICs send these
messages back to DCUs, which in turn forward them to the headend. The headend
sends these measurements to an analytic algorithm which is hosted in the cloud for
additional processing. The analytic algorithm filters any remaining noise in the
data to arrive at a conclusion regarding the phase connection of every meter
relative to the reference meter(s).