Wash. Admin. Code § 51-11C-40904 - Section C409.4-Measurement devices, data acquisition system and energy display
C409.4
Measurement devices, data acquisition system and energy display.
C409.4.1
Meters. Meters and
other measurement devices required by this section shall be configured to
automatically communicate energy data to a data acquisition system and energy
display. Source meters may be any digital-type meters. Current sensors or flow
meters are allowed for end use metering, provided that they have an accuracy of
+/- 5%. All required metering systems and equipment shall provide data that is
fully integrated into the data acquisition and display system per the
requirements of Section C409. Electrical meters shall be configured to
communicate data to the data acquisition system and energy display for both
consumption (e.g., kWh) and consumption rate (e.g., kW). Other meters and
measurement devices shall be configured to communicate data to the data
acquisition system for consumption.
C409.4.2
Data acquisition
system. The data acquisition system shall store the data from the
required meters and other sensing devices in a single database for a minimum of
36 months. For each energy supply and end use category required by C409.2 and
C409.3, it shall provide energy consumption logged in one-hour or less
intervals and energy consumption rate logged in 10-minute or less intervals.
Data from the data acquisition system shall be viewable via the energy display
in accordance with the requirements of Section C409.4.3.
C409.4.3
Energy display. For
each building subject to Section C409.2 and C409.3, either a single visible
display in a location with ready access, or a single web page
or other electronic document available for access to building operation and
management personnel or to a third-party energy data analysis service shall be
provided in the building; for metering data acquisition systems and energy
displays monitored by a third-party energy data analysis service, building
operation and management personnel shall retain access to the metering data
acquisition system and energy display. The display shall numerically provide
the current energy consumption rate and energy consumption total for each whole
building energy source and each end use category. The energy display shall also
graphically and numerically display logged data from the data acquisition
system for energy consumption for each whole building energy source and energy
consumption rate for whole building electrical use and each end use category
for any selected day, week, month, or year.
C409.4.4
Commissioning. Energy
metering and energy consumption management systems shall be commissioned in
accordance with Section C408.6.
Notes
Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. 13-04-056, § 51-11C-40904, filed 2/1/13, effective 7/1/13.
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