New Compact Acoustic Calibrator

UK manufacturer of industrial hygiene and occupational health monitoring equipment Casella CEL 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.