Number of Inputs - Each AEC Webmeter
is capable of monitoring up to four pulse inputs. Each pulse input can be
individually configured to log data at its own rate,
will calculate its own forecast, and can be configured
with its own alarm set point. One utility meter
can be connected to multiple inputs allowing collection
of data at different rates or the use of different alarm
set points.
Electrical Demand Synchronization
- Each input channel also includes an optional second
input to allow connection of a synchronization pulse
from a demand meter. Since
the electrical meter transmits a pulse on its demand
window output at the start of every demand window, use
of the demand synchronization input allows the forecast
calculated by the AEC Webmeter to be precisely synchronized
to the billing cycle of the power company.
Data Logging Capacity - Currently
the AEC Webmeter is capable of logging a total of five
thousand data points. At
a typical power company demand window, one sample every
thirty minutes, this is over 100 days of historical data
stored in the Web Meter memory.
Memory Protection - All data logged
by the AEC Webmeter is stored in a battery backed static
RAM. If power
is lost to the AEC Webmeter all data will be retained. Capacity
of the battery is sufficient to retain data in memory
for over three years with no power applied, and the battery
is easily replacable.
Input/Output Protection - All I/O
used by the AEC Webmeter are either dry contact relay
outputs or optoisolated 12VDC inputs. 12 VDC
for the inputs is supplied from the AEC Webmeter power
supply.
Power Supply - The AEC Webmeter
can be powered either by an external 12VDC supply or
a supplied 120 VAC wall transformer. Input power
is protected from reverse voltage, overvoltage, and
overcurrent by circuitry and internal fusing on the
AEC Webmeter board.
Configuration - The AEC Webmeter
is configured using a serial cable from a PC. Configuration
is saved in the same static RAM as the data, so loss
of power will not result in loss of configuration data.
Current
Status The AEC Webmeter was released in the third quarter
of 2003 and has been going strong ever since. New options
are currently being developed for the AEC Webmeter including
a pulse metering device to allow the AEC Webmeter to be used
away from a demand meter for cost accounting. There is also
a commercial and residential model being designed for use in
cost accounting in those industries.
Demo Unit You can see a sample of what the AEC Webmeter
internet output will be through our demo unit that has been
operating at our facility for nearly a year. To view the actual
operating AEC Webmeter running in our lab,
click here.
