Low and high-frequency field strenght measurings on location
Low-frequency and high-frequency field strenght measurings on location
Electromagnetic fields cause interference with electronics or they may affect the health of human beings. It is important to recognize this at an early stage. This can be done at a future construction location as well as while construction is in progress, so that budgets are not exceeded. By means of field-strength measurements one can chart the existing electromagnetic fields and radiation emitted by, to name but a few, GSM, UMTS antennas and transformer spaces. Based on these measurements the best location may be determined for rooms where sensitive measurements are to take place, for example in hospitals or nano laboratories. And lastly, field-strength measurements can detect sources of interference and be part of a scheduled check of existing screened spaces and Faraday cages.
Magnetic field-strenght ELF-measurements
Measurements can be carried out in the low-frequency spectrum (0 Hz DC - 30 MHz ) for magnetic fields around installations through which high currents flow. In most cases the frequency is 50/60Hz, for example in transformer spaces, overhead lines, bushbar systems, switchboard cabinets and close to high-voltage cables, train and underground railway lines.
Electric field-strenght EMF-measurements
Likewise measurements can be carried out in the high-frequency spectrum (9 kHz -22 GHz) for measuring electric fields generated by transmission equipment/installations among which C2000, GSM and UMTS towers, radar systems, wireless devices etc.
Tests may be performed to meet ICNIRP standardizations or alternative health recommendations such as SBM-2008.
Applications
Baseline
Elektromagnetic fields (V/m) or (W/m2)
EMF measurement
ELF measurement of transformer room (nano Tesla)
Detection of sources of interference
Established norms for health, environment, licenses, arbo regulations
Determining location for rooms to conduct sensitive measurements
Check of shielded areas
Assessment for the opposing party
Magnetic field-strenght measuring after shielding
Electric field-strenght measuring on location
Inhouse antenna calibration
Field-strenght measurement on location
Why measure?
It is extremely complicated to approach electromagnetic radiation from a theoretical angle - it can even be said to be impossible, due to the many variables in the environment. That is why measurement on location is often essential to chart the prevailing electromagnetic fields and to localize possible sources of interference.
Advantages
Measurement on location
Cost-effective
Clear reporting
Expertise in all screening/shielding disciplines
Recommendations with regard to reduction of the fields
Certification
Prevailing fields and recommended standards
Both for magnetic and for electric fields there are recommended standards, set by the Health Council as limits in the Telecommunications Act. Particularly magnetic fields are considered a serious threat to health; for instance, there is wide-spread concern regarding the causal connection between exposure to magnetic fields and the occurrence of leukemia in children. Moreover there are numerous health complaints which are associated with (linked to) exposure to magnetic fields, for example headaches, depression and insomnia..
Opstelling reductie meting
UMTS/GSM antenna
Electromagnetic Analysis Measurement
Damping characteristics + measurement calibration
Determining position of sensitive measurement room
When a map is made of the existing prevailing electromagnetic fields during construction, in an existing building or during remodeling, recommendations can be made for the optimal position for a sensitive measurement room.
Inspection measurements of Faraday cages
Every Faraday cage needs regular maintenance check-ups. This does not only apply to the workmanship of the door, because there can be many invisible reasons for a cage to become ‘leaky’ so it no longer works according to specifications. To check this we carry out control measurements on location. After the measurement, a certificate is provided. Periodic measurements are important for hospitals and companies with ISO (9000) certification.
Reduction performance measures 9 KHz to 22 GHz
Drawing test antenna
mu-copper screened room
References: (Below some examples of our customer portfolio)
Holland Shielding Systems BV performs professional Full Spectrum Magnetic DC & AC and electromagnetic EMF surveys throughout Europe and around the world.
Below you see frequency's that we can measure from low to high frequency: (For more information regarding our measurements, please contact us.)
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