Health & Safety 45 New Compact Acoustic Calibrator
UK manufacturer of industrial hygiene and occupational health monitoring equipment Casella CEL (UK) has launched a new acoustic calibrator. The simple, easy-to- operate CEL-120 features a rugged over-moulded design to facilitate the highly accurate calibration of Sound Level Meters in the field.
Calibration is an essential procedure when conducting any type of noise survey both before and after each measurement sequence. The process ensures that instruments are providing consistently precise readings necessary for monitoring to ensure compliance with workplace and environmental noise regulations.
Fully compliant with IEC 60942:2003 and ANSI S1.40:2006 standards, Casella’s new CEL-120 acoustic calibrator, which measures just 75.5mm x 54.0mm x 37.0mm, incorporates the latest digital technology to ensure exceptionally stable acoustic performance, as well as dual calibration level (Class 1 version) of 94dB and 114dB at 1khz.
For added ease-of-use benefits, the CEL-120 features a simple keypad specially designed for intuitive control, permitting calibration level changes as required. When used with instruments such as Casella’s well proven CEL-600 series of sound level meters, calibration routines start automatically as soon as a calibration tone is detected.
A MEMS (MicroElectrical-Mechanical System) microphone and a digital feedback loop maintain the acoustic pressure in the cavity at the required level. An indicator shows if the sound level meter microphone is incorrectly inserted into the cavity, removing any potential for calibration error. An energy-saving automatic power off function helps ensure batteries last for up to two years.
Both the CEL-120/1 and CEL-120/2 models accept all industry standard ½” microphone capsules. Smaller ¼” microphones may be accommodated using the ½” to ¼” adaptor (CEL-4726). The relevant calibrator is also available as standard with Casella’s range of noise monitoring kits.
Reader Reply Card No. 119
Heat Stress Monitor (HSM) - an Innovation in Heat Stress Monitoring
The portable, rugged Calor Heat Stress Monitor (HSM) is an essential tool for occupational and environmental health and safety (OEHS) professionals to measure radiant temperature, dry bulb ambient temperature, relative humidity, wind speed, and air pressure parameters that affect heat stress in various conditions from industrial workplaces to underground mines.
The HSM has applications in the military, foundries, agriculture, offshore drilling operations, food industry, engineering, sports, and industry. Due to its rugged design and anemometer for measuring wind speed, the HSM is well suited for monitoring in underground mines.
The HSM measures; black globe radiant temperature, dry bulb ambient temperature, relative humidity, wind speed, and air pressure. Rugged design stands up to use in underground mines, whilst small size and light weight design ensure easy portability and fast deployment - 370gms (with batteries) (H9.4cm W12cm D4.5cm).
A foldaway sensor system is present, as is a large backlit LCD. The HSM calculates wet bulb temperature based on dry bulb, RH, and wind speed eliminating refilling of thermometer water. This toll displays results as; WBGT (ISO 7243 1989) (BS EN 27243/1994), Thermal Work Limit (TWL) in w/m2
, air cooling power in w/m2
and also Min/Max work cycle times. Environmental zone ratings include; unrestricted, acclimatised, buffer, and withdrawal. An Internal logging system allows data to be downloaded to a PC.
OEHS professionals find the HSM ideal for confirming the appropriateness of work clothing and personal hydration practices to prevent heat stress.
SKC Limited and their agents are the exclusive distributors for Calor HSM in the UK and Europe.
Reader Reply Card No. 120 Reader Reply Card No. 121
IET November / December 2011
www.envirotech-online.com
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