User's Guide

Chapter 5 • Features
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 37
available to the MDMS, it will be able to synthesize a dial reading for each channel
for every interval throughout the day.
The meter is also able to capture quantities that may be of interest to operations
more so than the billing department. It can capture minimum and/or maximum
temperature, as well as minimum, average, and/or maximum voltage or current.
N
OTES A form 12S meter, with firmware 6.0 and patch 4.1 (or later), along with NIC
firmware 3.0 (or later), are required to obtain voltage measurements on Phase
C.
The K2 switch is required to enable reactive energy measurements. The Q2
switch is required for voltage measurements.
Voltage and current are measured cycle by cycle. If the minimum or maximum
of a voltage or current is reported, it represents the minimum (or maximum)
voltage (or current) occurring over a single cycle out of all of the cycles
monitored during the LP interval. The timestamp associated with that interval
will represent the end of the interval, not the moment that the minimum or
maximum occurred. The voltage event log however (if enabled) can capture a
voltage minimum or maximum and report the magnitude and timestamp of a
voltage sag or swell.
The I-210+c includes harmonics in its measurements. To obtain a fundamental
only measurement of energy one must use a meter such as the KV2c.
Daily Shifted (DS), On-Request (OR), and Demand Reset (DR)
Quantities
The meter supports a wide range of billing and engineering quantities. Once the
meter is programmed with specific quantities to capture, the NIC must be
configured to report specific quantities from the programmed subset.
The meter is capable of reporting each of the four flow directions (forward,
reverse, total, and net) for kWh and kVArh energy. These will be expressed as
bulk quantities and could appear as dial readings. However, while the LCD will
likely provide kWh resolution, the NIC will supply the measurement with
resolution down to the watt-hour. If a bulk quantity of these channels is reported
with a Daily Shift message, and every interval of LP data is available to the
MDMS, it will be able to synthesize a dial reading for each channel for every
interval throughout the day with Wh resolution.
The meter is also capable of capturing maximum demand values per a predefined
demand interval. This demand interval is not usually communicated between
systems. It is set by the tariff and understood that all components will measure
according to the tariff requirements. When demand is talked about, it is always in
the context of the mutually agreed upon demand interval. Data from the meter is
normalized in the meter to convert Wh measurements to Watts over the course of
the demand interval.