What is EMF?
“EMF” is an abbreviation for “electric and magnetic fields” and “electromagnetic fields.” Power lines, appliances, and home wiring all produce electric and magnetic fields. “EMF” is also often used by people as shorthand for just “magnetic fields,” which some people are concerned about, so that is what “EMF” refers to here.
Why test for EMF?
If you are a heart-device patient, you may find your device at risk of interference around high-voltage overhead power lines, radio transmission towers, electric power tools, portable two-way radios, large AC and small DC motors and so on. In the workplace you may request an Electromagnetic Field Interference (EMI) survey (also called a site survey) of your workplace. An EMF testing
consultant can conduct a site survey of your entire work facility or even a single piece of equipment.
Sources of EMI in the workplace
Types of workplace measurements:
- Overhead Power Lines
- Motors (AC and DC)
- Industrial Magnets
- Accessible electric circuits with live current
- Power Frequency: E-field strength
- Static or DC Currents: B-field strength
- Power Frequency and Modulated Magnetic Fields: H-field strength (B-field)
- Radiofrequency or High Frequency: RF-field strength:
- Conducted Electric fields
For medical professionals
As a cardiologist, you need to know about electromagnetic interference (EMI) that can affect your patients’ implanted heart rhythm devices.
- Can employee with an implantable device return to work safely.
- Are restrictions to an employee’s work environment required.
- EMI testing reveals which minor modifications need to be made to satisfy ADA requirements.
- The major US Heart Device Manufacturers are:
- Medtronic CRDM
- Boston Scientific CRM
- St. Jude Medical