CEMP-E
TI 811-12
18 August 1998
etc.), and its maximum flow rate. For electrical service metering, determine the secondary voltage to the
building and the maximum amp service. With this data, cost estimates can be developed for installing
building and equipment submetering.
m. Data Transmission System. There are three methods available for DTS: (1) fiber optics (FO), (2)
wirelines, and (3) radio frequency (RF). Each DTS type has its economic and technical benefits. The
preferred DTS is fiber optics or wirelines. The selection will be based on economics and the particular
site requirements. Any new communications systems at a facility will have to be coordinated with the
local communications office for approval. For DTS to be installed on existing aerial poles, meet with the
communications personnel at the installation and go over the proposed DTS routing on site plans
showing existing telephone and electrical power poles. The local communications office should identify
all rights-of-way for adding cables on these poles. In addition, if the facility has specific design criteria for
installation of overhead wires, the communications office should provide these guidelines. For
underground direct buried DTS, the communications office should locate on site plans special
obstructions or right-of-way problems. On some facilities where communications wiring is run
underground, there may be spare conduits available for special applications, such as UMCS or
fire/security. Communications office approval is normally required to use these conduits. The use of
radio frequency equipment requires approved frequencies to transmit data signals to receivers on the
facility. Again, the communications office should identify any problem areas to reach with RF signals (for
example, " hadows"behind obstructions or other RF noise interference).
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(1) Fiber Optics and Wireline DTS Application. Each facility will have its own design criteria for
installation of communication cables. In some instances the DTS will be aerial, and in some cases it will
be underground. After identifying the routing of the DTS from building-to-building, locate the DTS
entrance to the building floor plan where the contractor will mount the cable terminations and junction
boxes. Also note the exterior wall construction, which is needed for wall penetration details and cost
estimating. Once the basic method of installation of the cabling has been determined through
coordination with the communications office, conduct a visual survey with the facility site plans to verify
pole locations, direct buried cable obstructions and other factors which might significantly impact the
budgetary cost estimate.
(2) Radio Frequency DTS. The use of radio frequency (RF) DTS involves the installation of
radio receivers and transmitters for data communications. Coordinate the possible use of RF with the
communications office to avoid problems with the availability of radio frequencies for data transmission.
On some facilities, all available frequencies are used and RF will not be an option. To survey a facility for
RF DTS, look at the local geography. Make note of large hills and valleys which may obstruct the
communications of the RF. Also, determine where the main transmitter antenna should be located.
Many times a tall building will provide a suitable location for elevating the antenna system. If there is no
available tall building, identify an alternative location for a new antenna tower. The transmitter for the RF
must be located in close proximity to the antenna. If the antenna is located on top of a building, the
transmitter could be located in the building. If a new antenna tower is built, a new enclosure may be
necessary to house the transmitter. Since the RF DTS is only used for communication between the
UMCS central equipment and the SFPs, the designer must choose an alternate DTS for SFP to field
equipment panel communication.
n. Energy Savings Estimation. Collect all essential data to estimate potential energy savings and
system cost. Survey Sheet 8, Energy Estimating Survey Observations, is a list of information required for
this purpose.
o. Documentation of Results. After completing the survey, compiling and organizing the data will
help in determining whether the data is complete. All survey notes and sketches should be dated and
initialed by the engineer in charge of the survey. In many cases, changes will occur during and after the
UMCS design. If there is any question as to the conditions at the time the notes were made, it is
important to have the date and person responsible for the survey data. During this period, it is also
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