UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
7-5
MONITORS
7-5.1
Monitors should be ergonomically mounted. New products allow wall-
mounted flat-screen plasma displays and smaller, hinged, flat monitors that can be
swiveled out and adjusted for individual operators.
7-5.2
Monitors should meet the following minimum specifications:
7-5.3
Horizontal resolution: 450 lines of horizontal resolution at center; 700-800
TV lines offer super-high resolution.
7-5.4
Brightness: More than 250 lux in 100% white signal at center.
7-5.5
Total geometric distortion: less than 3%.
7-6
GROUNDING/POWER CONDITIONING
7-6.1
It is a good practice to provide a dedicated ground bus bar in the Dispatch
Center for grounding the ESS panels. Refer to NFPA 70 and TIA-J-STD-607 for
additional guidance on grounding and power conditioning.
7-7
HVAC
7-7.1
Typical environmental conditions for a Dispatch Center are as follows:
7-7.2
72 degrees Fahrenheit plus/minus five degrees.
7-7.3
50% Relative Humidity (RH) plus/minus 10%. If the relative humidity drops
below 30%, there can be equipment problems due to abnormally high level of static
electricity. Conversely, too high a humidity can result in condensation, which may cause
electrical shorting or corrosion problems.
7-7.4
HVAC heat/cooling loads can be calculated by considering these heat loads:
7-7.5
Personnel and equipment. The average staffing count of personnel in
conjunction with the kilowatt (kw) load of associated electrical equipment such as DVRs
and ESS servers as well as internal lighting loads. For personnel, ASHRAE 62
recommends 20 cfm flowrate per occupant. Refer to NMCI UFC 3-500-10N and utilize
equipment loads based on the room configuration.
7-7.6
Shell load. Shell load considers the perimeter walls, ceilings, windows, and
associated solar gains of the external surfaces.
7-7.7
Dispatch Center location.
7-7.8
Components to consider are air handlers, ductwork, inlets and outlets
(diffusers and grills), as well as heating and cooling sources.
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