46 Health & Safety
New Modifications to Personal Sound Exposure Meter Available to New and Existing Users
New Differential Air Pressure Sensor Board
An innovative new differential air pressure (ΔP) sensor configuration is now available for use with GrayWolf’s (USA) AdvancedSense™ and WolfPack™ instruments. By combining auto-ranging and
auto-zeroing technology, this ΔP board offers superb low-end sensitivity, yet an exceptionally broad measurement range.
There’s a trade-off between range and low-end resolution with commercially available ΔP sensors. For many Indoor Air Quality (IAQ), Heating Ventilation Air Conditioning (HVAC), Industrial Hygiene (IH) or
other applications, extremely low-end ΔP resolution is critical, yet a wide measurement range is highly
desirable. GrayWolf solves this by incorporating a 250.0 Pa (1.000 inches H2O) range sensor and a 10KPa (40.0 inches H2O) sensor on the same board and then smoothly auto-ranging from one sensor to the other dependent on the detected pressures. A further issue for low-end measurements,
such as determining pollutant pathways, is that sensor drift at these tiny pressures may be significant over a matter of only minutes. Most low range digital manometers include a manual zeroing button to depress in open air ahead of each reading. But for long-term monitoring, the manometer must re-zero automatically in order for the readings to be reliable over time. The DP-702LH board does exactly this, auto-zeroing both sensors every 2 minutes.
This combination of unequaled low-end sensitivity, and wide-range measurement capability, makes the DP-702LH ideal for applications including; verifying positive pressure in occupied areas during local
area construction, investigating pollutant pathways (quantifying ΔP is an essential IAQ investigation tool),measuring static pressure, air velocity and volume airflow with a pitot static tube and measuring air velocity over a broad range with a pitot static tube; 1.0 m/s up to 125 m/s (200 ft/min up to 25,000 ft/min).
Demonstrating its continued commitment to improving its range of industrial hygiene and occupational health monitoring equipment, Casella CEL (UK), has announced modifications to the CEL-350 dBadge Noise Dosimeter, which will allow the user to view run information while a measurement is in progress. In addition, the newly enhanced unit can be locked to prevent results from being viewed by unauthorised personnel.
The digital, cable-free CEL-350 Series of Dosimeters or Personal Noise Exposure Meters accurately measure all occupational noise parameters, and gives the time history of an individual's noise exposure throughout the day via a built-in graphic display.
Casella CEL Market Manager, Tim Turney, explains the background behind modifications to the firmware: “A number of our larger customers have requested the ability to see what is happening while a run is in progress to allow them to make operational decisions based on the values measured so far. This can include, but is not limited to, checking an eight-hour run after two hours to see if the dosimeter has accumulated more than 25% of the allowable noise dose.”
Turney continues: “Accumulated run results are also available in terms of the time average level Lavg decibel level measured so far. Both of these values are produced with the key threshold values of 80 and 90 dB as per the OSHA workplace noise regulations.”
Previously all CEL-350 run values were suppressed on screen during a run and were not available for viewing until the run was stopped. The intention was to secure the display against being seen by the wearer and minimise the likelihood of results being falsified.
Customers now have the option of locking the unit display to prevent the results from being viewed during a run by unauthorised personnel. It is also possible to set the run to last for a fixed duration from 30 minutes up to 12 hours in 30- minute increments.
Another benefit of the changes is that a total of seven screens are now displayed individually for approximately five seconds each before moving on to the next. This allows the supervisor enough time to see the results that are of interest without having to wait too long before moving to the next screen.
Casella’s CEL-350 dBadge range also includes the ‘Lite’ model, which offers simple functionality at a very affordable price, ensuring that cost need not be a deterrent to safety. The 'Lite' measures all the same occupational noise parameters as the original dBadge except for the time history of exposure to noise levels, so is ideal for users needing straightforward noise dose results at low cost.
Casella CEL is offering all of the latest changes as standard in future dBadge dosimeters and, as they can be reprogrammed into older CEL-350 hardware, the changed v1.13 firmware will be used to upgrade existing models.
Reader Reply Card No. 125
The DP-702LH sensors install into GrayWolf’s AdvancedSense and WolfPack instruments which not only display and data-log readings, but also provide powerful annotation capabilities. Notes are easily attached to data files on-site for efficient, reliable documentation. Attach extensive audio notes with the built-in voice recorder. Even attach photos and videos to data files with an optional camera or borescope. Reports are proficiently generated from information in the field. WolfSense PC software (supplied as standard) enables simple download, analysis and report creation. Optional “Advanced Report Generator” software automates the entire reporting process.
Reader Reply Card No. 122
Portable Infrared Gas Analyser for On-site SF6 Gas Measurements
The InfraRan Analyser -- a portable, mid-infrared specific vapour analyser – form Wilks Enterprise (USA) is designed for easy, on-site measurement of sulphur hexafluoride (SF6) and is ideal for fume hood evaluations as per the ASHRAE 110 Method, as well as for determining airflow in ventilation systems, rooms and buildings. The InfraRan Specific Vapor Analyser provides accurate, on-site, real-time measurements of SF6 and is factory calibrated for measuring SF6 in the 0 – 10 parts per million (ppm) concentration range with resolution to 0.01ppm.
The InfraRan Specific Vapour Analyser has been designed to be a rugged, field portable instrument, weighing under 18 lbs. It is ideal for both on-site survey studies and laboratory analyses. The analyser is factory calibrated for SF6 and operation is user-friendly via menu-driven software enabling non-technical personnel, as well as certified industrial hygienists to obtain easy, accurate measurements. The InfraRan Specific
Vapour Analyser has a internal rechargeable battery for up to 8 hours of continuous field use or it can be operated from a 110/220V power source.
Reader Reply Card No. 123
Hazardous Location Approved Remote Area Lighting System
To give users a safer option in hazardous locations, Peli™ Products (Spain), announces that their Advanced Area Lighting Group, has rolled out the 9435 Remote Area Lighting System (RALS) as its first safety-approved LED area lighting system.
Built with versatility and safety in mind, the 9435 is a compact, 7,98kg, portable area lighting system that boasts stringent approvals from ETL (Class 1, Div 2) CE and ATEX. The 9435 brings portable, powerful, energy-efficient and environmentally responsible lighting technology to remote area applications.
It features a swiveling telescope mast (extends to nearly 1 meter), a 360 degree articulated light array and a wide area handle for easy gloved grip and transport.
The 9435’s next-generation LEDs and dual power mode (with water-proof switch) radiate 1,500 lumens in high and 750 in low. Powered by a maintenance-free rechargeable battery, the system offers up to 5 hours of peak brightness and takes 8 hours to be completely charged when fully expended.
With an extremely durable, water-resistant, polymer construction the 9435 is available in Orange. Reader Reply Card No. 124
IET November / December 2011
www.envirotech-online.com
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