Field Management Services
Mitigating Electromagnetic Interference (EMF/EMI)
in Scientific & Medical Research Facilities
and Commercial Buildings

Increasing the Distance from the Source


Frequently, the most cost effective means to reduce AC magnetic field strength in an area is to simply increase the distance between the affected device and the source of the interfering AC magnetic fields (electrical panels, circuits, etc). AC magnetic fields fall off quickly with distance; moving a jittering monitor further away from a circuit breaker in the wall may be the best solution. Often, a relatively small change in location or orientation of the monitor is sufficient to reduce or eliminate the image jitter.

Other situations may require relocating the electrical equipment (the source of the fields) to another area. Though effective, moving conduit, electric service panels or transformers can be expensive and disruptive. In many cases too, it may "cure" one area, while creating a new problem elsewhere.

If the source of the magnetic fields cannot be moved, then possibly the affected equipment or area can. An option is to redesignate the use of the area affected by elevated magnetic fields. In buildings where space is not an issue, an affected office area can be converted into storage or a meeting room, because it cannot support computer use. When space is more of a commodity however, downgrading prime office space is undesirable and ultimately expensive in lost utility and possibly lost revenue.

Distance on Magnetic Field Strength

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Case Study:
Power Quality

Elevated EMF levels on the ground floor of a Class-A building rendered the space unusable for most computer use. An in-depth investigation revealed that power quality issues were the major source of the EMF interference. Find out how FMS teamed up with ConEd Power Quality Group to locate and rectify the problem.

Case Study:
Monitor Distortion

At what range of ELF magnetic field levels is monitor distortion apparent on modern computer monitors? Explore the research conducted by FMS to find the answers.
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