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EMF Testing
EMF (RF) Radiation Measurement solutions: Electric, magnetic and electromagnetic fields exist wherever
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EMF Testing

EMF (RF) Radiation Measurement solutions:

Electric, magnetic and electromagnetic fields exist wherever voltages and currents are present. With rapid growth of Wireless networks like GSM/CDMA Telecommunications networks, Broadcasting facilities for radio, television, Wireless LAN like Wi-Fi networks, MW Satellite communication links, House hold utilities like Microwave Oven etc emit electromagnetic fields, as do industrial facilities etc.

When it comes to how electromagnetic fields affect humans, Many studies were done by various organizations and ICNIRP (International Commission for Non Ionization Radiation Protection) defined general limits for human exposure and accepted by DOT Government of India. These values are important in occupational safety and for protection of the general public.

The effects of electromagnetic fields are dependent on the following:

. Frequency
. Field strength
. Time of exposure
. Extent of exposure (part of body or entire body)

Protective Measures

Measurements- The first step towards effective protection
At the place, many different combinations of LF and RF radiation can exist. The only way to accurately assess EMF is through the survey by use of suitable measuring devices. Measurements are also required to detect leaks at any equipment used with Frequency and power.

Requirements for EMF measuring devices
Depending on the frequency range, EMF measuring devices must be capable of determining electric field strength E, magnetic field strength H, magnetic flux density B and/or power density S. Such devices must also meet the requirements stipulated in standards and include features such as averaging, RMS values, Max/Peak values and isotropic (non-directional) probes. Practical features include data memories, alarm functions, and automatically zero alignment and straight forward operation.

GRAMTEL Delivery of Preparation and measurements of a location
Exposure conditions and information about the exposed persons (locations and times, shifts, groups) must be taken. The operating status must be assessed in case of facilities with variable operating parameters. The measurement techniques and test equipment must be selected depending on the technical conditions and regulations.

A functional check and zero alignment must be performed on the test equipment It is also important to make sure that the calibration interval specified by the manufacturer has not expired. The procedure followed is listed below

OBTAIN INFORMATION ABOUT EQUIPMENT UNDER TEST

PRELIMINARY MEASUREMENT

GENERAL ANALYSIS OF THE FACILITY

DETERMINE REFERENCE POINTS AND WORK AREAS

DETERMINE BOUNDARY CONDITIONS

MAKE THE MEASUREMENTS

PREPARE THE MEASUREMENT RESULTS


GRAMTEL will provide a complete test report for the indicating the buildings or sites of results vis-a vis with standards and limits given internationally.

Important protective measures when limits are violated
Any hazardous area needs suitable organizational measures which might include a fixed measurement system. Depending on the extent of the hazard, this can also involve locks, shielding or enclosures to ensure that the proper distance is maintained and if required a warning sign may be placed to reduce time of exposure at a given point.

For persons who must enter hazardous areas (e.g. for maintenance work), there are different possibilities depending on the relevant standard or operating instructions, e.g.:
. Selection of time frames within lower system utilization (and thus lowers EMF   emissions)
. Techniques for approaching the fields source
. Possible reduction in power levels
. Complete system shut down


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