Health & Safety
Real-Time Analysis of Electromagnetic Fields in Hand-Held Format
Narda Safety Test Solutions (Germany) has now equipped its frequency-selective measuring set for electromagnetic fields with a “Scope” operating mode. Using this, it is now possible to analyze the frequency content and time characteristics of signals from radar equipment, mobile communications services such as Wi-Fi, WLAN, WiMAX, and DECT, or radio control systems like ZigBee and Bluetooth.
The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions is now available with a “Scope” operating mode. The instrument displays the real-time characteristic of a signal recorded using frequency selection. It is possible to measure pulse widths and signal periods as well as set triggers, just as with an oscilloscope. The time intervals that can be set range from 24 hours down to microseconds, and the resolution goes down into the nanosecond range. It can therefore be used to make long-term observations of individual radio channels e.g. over the course of an entire day, as well as to detect even the shortest of impulses, such as from radar equipment.
Reader Reply Card no 148 This combination of frequency-selective measurement and display versus time opens up possibilities that are not covered by either pure spectrum analysis or simple measurement over time:
In unknown multi-frequency environments specialists can determine the type of field source by marking a frequency line displayed in “Spectrum” mode and switching to “Scope” mode to look at the time characteristic which exhibits specific features for various mobile communications services such as Wi-Fi, WLAN, WiMAX or DECT. The resolution bandwidth (RBW) can be set between 40 kHz and 32 MHz – enough to capture an entire WiMAX channel.
Where the signals are known, e.g. from GSM stations, operators can select a single 200 kHz bandwidth traffic channel (TCH) and measure the loading of the individual timeslots within the frequency channel using “Scope” mode.
In “Scope” mode, the instrument records the real peak values of radio control signals in the industrial environment, such as ZigBee, or Bluetooth, or in the public and private domain – garage door openers, automobile keys, installation switches – even in complex situations where several signals are superimposed. The SRM-3006 measures the average, RMS and peak values simultaneously; further conclusions about the type of field source can be drawn from the ratios of these values to one another. The instrument can be set to display all results in either physical quantities, such as field strength (V/m, A/m) or power density (W/m2
, mW/cm2
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), as logarithmic expressions (dBµV), or directly as a percentage of the permitted limit value. For the latter, the weighting curves for all
the current safety standards are stored in the instrument. The SRM-3006 automatically takes the calibration data into account when Narda’s proprietary antennas are used. The instrument also accepts measuring antennas from other manufacturers, such as socalled sniffer probes. In such cases, software can be used to upload the calibration data to the instrument.
About the SRM-3006
The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions has been specially developed for environmental and safety measurements in electromagnetic fields. Using isotropic measuring antennas, the instrument covers the entire frequency range from 9 kHz to 6 GHz. It can therefore be used equally well to investigate safety in the near field region of long wave transmitters, make measurements on radio and TV broadcast transmitters, and determine exposure levels caused by the latest generation of mobile telecommunications services.
Reader Reply Card no 149 COSHHSMART Launch a Success Following its launch at the Safety & Health Expo in May, COSHHSMART is proving to be a huge success.
Aimed at small or large companies who have a limited requirement for COSHH assessments due to the relatively small number of products used on site, COSHHSMART enables you to protect both the health of your employees and your business whilst ensuring you are complying with the COSHH Regulations.
Our experience over the last 21 years of assisting companies with their COSHH compliance, using CMS from Sypol, means that we are in a unique position to make sure that the smaller user can also now access our trademark pictorial assessments but in a truly cost effective way.
Features: Pictorial summary sheet for the worker, web based, Safety Data Sheet (SDS) repository, audit trail, management dashboard to help you manage change and assessments kept up to date.
Benefits: Easy to interpret and understand, accessed from anywhere in the world, immediate access to the appropriate, SDS linked to the COSHH assessment, everything you do is tracked, hazard and risk rating, outstanding actions flagged, user prompted when assessments due for review and user prompted when assessments updated due to legislative changes.
Using a simple assessment request wizard, the system documents your required exposure scenario to help you to search our database for the product you are using, in the way that you are using it and, if you get a match, the assessment is immediately available. If the search does not find what you need, the request comes through to Sypol’s consultants who produce a new one for you.
The ’My COSHHSMART’ dashboard prompts you when Sypol has altered or updated your assessments as legislation changes, ensuring that you manage change effectively and efficiently.
COSHHSMART is also the perfect solution for internal and external auditing. Plus you have access to Sypol’s helpdesk and management reports within the software, such as safer substitute search, health surveillance information, etc.
So if you are an SME or an orga nisation with limited requirements for COSHH, give us a call and let us show you how you can maintain compliance with the Regulations and access help when you need it from the people who know about COSHH.
Reader Reply Card no 150
Cirrus recognised as a Registered Safety Supplier
Cirrus Research (UK) is pleased to announce that it has been awarded a shield to identify it as a member of the Registered Safety Supplier Scheme (RSSS). Following compliance with a strict set of criteria, Cirrus will now be able to use the scheme shield to identify its organisation and products as ‘genuine and safe’.
Launched by the British Safety Industry Federation (BSIF) as part of its ongoing Counterfeit and Illegal products campaign, the scheme is designed to assist buyers of safety critical products find quality supply sources and offers assurance that the products supplied are genuine and properly tested and certificated.
Reader Reply Card no 151 Permeation Tubes for Hazardous Air Pollutants
Kin-Tek (USA’s) new Trace Source™ Permeation Tubes are used to blend gas calibration standards needed for air analysis for many Hazardous Air Pollutants (HAPs). Over 80 HAPs are currently available in Trace Source™ tubes. Applications include formaldehyde, hydrazines, ethylene glycol, cresols, naphthalene, and 15 other compounds not available as ‘cylinder’ mixtures.
Trace Source™ permeation tubes emit a constant flow of vapor that is used to dynamically blend low-pressure gas mixtures. Emission flow measurements are traceable to NIST through fundamental measurements (weight change, temperature, etc.). Mixing the emission flow with a traceable flow dilution gas creates a traceable mixture.
FlexStream™ and AutoBlend™ Gas Standards Generators provide the controls required to blend traceable gas mixtures using Trace Source™ tubes.
Reader Reply Card no 152
November/December 2010
IET
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