DCA CONSULTING - Quality Consulting Services to Data Center. DCA Consulting uses a careful, pragmatic approach to investigate, gather data, analyze and resolve the most complex power quality, contamination and cooling problems by using state-of-the-art testing and monitoring equipment. DCA consulting not only offers 25 years experience but they offer a professional and proven scientific approach to solving problems in today’s data centers. Everyday, our specially trained technicians clean a myriad of cleanrooms, computers rooms, laboratories, telecom facilities, and video sites : Data center cleaning. KoldWorks is a suite of specialized engineering and educational services designed by Upsite Technologies® to enhance data center performance without additional capital investment.DCA Consulting focuses on improving the productivity and reliability of electronic equipment in the data center environment through consulting services. DCA Consulting offers power quality expertise for the most complex power problems. DCA offers expertise for all aspects of power quality for the data center environment including EMF, high frequency and RF interference, and those hard to diagnose grounding issues that may be causing intermittent interruptions in the data center operation or network performance. The PUE or Power usage effectiveness (PUE) is a metric used to determine the energy efficiency of a data center. PUE is determined by dividing the amount of power entering a data center by the power used to run the computer infrastructure within it. PUE is therefore expressed as a ratio, with overall efficiency improving as the quotient decreases toward 1. PUE was created by members of the Green Grid, an industry group focused on data center energy efficiency. For your offices, DCA Consulting may not be your first choice to investigate the IAQ however for your data center, DCA Consulting should be your only choice. No one knows more about data centers than we do. We know where to look and what to look for.

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	POWER QUALITY
	Signal Reference Grounding
	Signal Reference grounding (SRG) is the most efficient way of dissipating the HFI and helps to shield equipment from RFI so that interference noise is no longer a threat to computer equipment. HFI is a potentially detrimental loop formed when two or more points in an electrical system that are nominally at ground potential and are connected by a conducting path such that either or both points are not at the same ground potential. HFI generated within the facility can come from a variety of sources, such as electronic ballasts, HVAC, construction activity, miswired electrical distribution or equipment, and even communication cable placement. Because of the increased speed of computer equipment and the lowering of logic voltages to compensate for the increased speed, HFI becomes a serious threat to data and system reliability. IEEE defines a signal reference grid as “A system of conductive paths among interconnected equipment that reduces noise-induced voltages to levels that minimize improper operation. Common configurations include grids and planes.” Bonding is the most efficient way of eliminating the HFI threat to computer systems. Many customers have begun to understand the benefits of SRG grounding and are starting to install signal reference grids under their raised floor structure. This illustration shows the construction of an SRG using a bolt together grid structure and circling the perimeter of the floor and connecting to every-other floor pedestal. The perimeter conductor is then connected to the ground bus in all power panels. This construction creates an equipotential ground plane and allows connection to the grid at any pedestal in the floor structure. All server cabinets will bond to the nearest floor pedestal. For more information about signal reference grounding in your data center, contact DCA Consulting.
Electromagnetic Fields \| Radiated Frequency Interference \| High Frequency Interference \| Grounding Studies & Enhancements Ground Resistance Testing \| Signal Reference Grounding \| Load Balance Measurements
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