Know Your Meter
The Consumer Energy Meter (CEM) is an all-electronic, solid state, poly phase energy meter which accurately measures all parameters of the supply voltage, current, power-factor, KW, KVAr, KVA etc., in addition to active, reactive & apparent energies (as the case may be). The CEM is designed around an Application Specific Integrated Circuit (ASIC) based micro-controller with its own programming language. It also has a high degree of programmability to accommodate various types of applications & tariffs.
The Metering System provides a total solution to Energy Metering. It is not a meter alone or energy-billing computer, but an all-encompassing system that covers all these aspects. It offers in one package a complete system for the analysis of power and revenue.
Meters are read in the following manner :
a) Manual Reading from the Meter display window — For viewing Display Sequence, click here
b) The meters are Automatic Meter Reading (AMR) enabled. Remote Meter Reading (RMR) is carried out through GSM/GPRS Modems. The Modems are connected to the meters through their optical / RS232 ports.
c) The meter reading Instrument (MRI), an instrument used by meter readers for electronically collecting the meter readings & other performance data from the CEM.
BASIC MEASUREMENT PRINCIPLE :
a) An analogue to digital converter is used to sample voltage and current relative to incoming waveform.
b) High sampling rate gives exceptionally accurate results with highly reliable non-volatile memory.
c) The data from non-volatile memory can either be displayed on the LCD display or can be communicated via an optical communication port on to a hand-held MRI