26 Portable / Field Testing Accredited Calibration of Field Strength Meters
Effective from 12th of July, Narda Safety Test Solutions GmbH (Germany) has been awarded accreditation for electric and magnetic field strengths by DAkkS, the national accreditation body of the Federal Republic of Germany. This enables Narda to offer accredited, internationally recognised calibration of field strength meters to their customers.
The calibration laboratory of Narda Safety Test Solutions GmbH in Pfullingen is accredited for electric field strengths in the frequency range 9 kHz to 18 GHz. The calibration range covers up to 300 V/m depending on the frequency, and extends down to 2 V/m – i.e. field strengths that are relevant when it comes to measurements for human safety and environmental field exposure.
The accreditation certificate confirms that the laboratory meets the “general requirements of competence for test and calibration laboratories” according to DIN EN ISO/IEC 17025:2005. The calibration method itself is described in IEEE Std 1309-2005, which is the most comprehensive and therefore globally recognised “Standard for Calibration of Electromagnetic Field Sensors and Probes”.
The calibration certificate gives the customer details of the measured values and their associated measurement uncertainties, as well as additional information about the calibration that was performed. Customers also benefit from the Mutual Recognition Agreement of ILAC (International Laboratory Accreditation Cooperation) which ensures that the accredited calibration certificates from Narda Safety Test Solutions laboratory's are recognised worldwide by leading institutions.
As well as accredited calibration, Narda Safety Test Solutions will continue to offer their factory calibration service. All calibration services can also be combined with maintenance and adjustment. The company can also carry out rapid repairs to Narda equipment because as the manufacturer it has both the know-how and the original spare parts for the product.
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New Noise at Work Sound Level Meter Launched
A new range of world-class professional sound level meters specifically designed to meet noise at work requirements is now available from Pulsar Instruments plc (UK). The Pulsar Nova range comprises a choice of 6 hand-held meters perfectly suited for safety professionals seeking to undertake anything from the most basic noise level assessments, occupational and industrial hygiene noise measurements to more complex environmental noise monitoring.
Featuring a high resolution OLED display, ambient light sensor and illuminated silicon elastomer keypad, the Pulsar Nova sound level meter offers users a very clear visual of noise measurement data under all weather conditions. The meters are easy to operate and allow measurements to be captured and displayed in 3 easy steps. A unique 30 hour battery comes as standard with all 6 meters prolonging the life of the instrument thus saving users time by allowing more time for measurements and by removing the need to change batteries after a few hours of use.
The meters have a die cast aluminium outer case offering maximum robustness and reliability needed by heavy industries such as engineering, manufacturing, construction and transportation whilst requiring minimum training. The Pulsar Nova meters are available are standard measurement kits or longer term outdoor monitoring system.
Sarah Brack, Managing Director of Pulsar Instruments, said “The Pulsar Nova sound level meters can be upgraded further with a range of optional modules at the time of purchase or later on making it the ideal solution to cover every requirement and budget”.
The new Pulsar Nova sound level meters come with a 7 year warranty .
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Solution for Reliable RH Measurement in Ultra-Harsh Conditions
When a European OEM customer needed a reliable RH and temperature probe that would stand up to highly challenging and corrosive conditions, they contacted Michell Instruments (UK) for a solution. Michell’s PCMini52 RH and temperature probe is designed specifically for harsh environments. Its electronics are potted to provide protection from the surrounding atmosphere which means it can survive for longer in aggressive atmospheres than comparable products. However, the OEM customer wanted to provide extra reliability and low-maintenance for its customers so they asked Michell to adapt the measuring element filter of the PCMini52 to meet its specifications.
While the calibrated performance of a sensor is important, in practical factory-floor applications, mechanical protection and strength of the humidity filter around the measuring elements also play a vital role in successful measurements, and this is what Michell’s team of custom-build engineers focused their attention on. They designed a simple, mechanical protection system to enable the PCMini52 to withstand the ultra-harsh conditions demanded by the OEM.
The application involved high levels of condensate surrounding the probe, so the main challenge was to prevent ingress into the probe at the joint of the filter assembly. The solution was deceptively simple: an alternative filter guard for the sensing head was engineered to reduce the possible points of ingress for condensate and provide extra strength and protection. The filter protection cap was also designed to visually indicate contamination, which acts as an additional fail-safe for the process.
IET September / October 2013
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The new filter is now available as an option on the RH probes from Michell Instruments .
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