Power Supply lasts up to 40 hr on set of AA batteries.
Press Release Summary:
Designed for use with externally polarized condenser microphones, single-channel Model 2221 supplies 0 or 220 V polarization voltage. User-selectable features include flat, A, or C-weighting filters and 0, 20, or 40 dB gain switch. In addition to battery operation, unit can be run with on-line power via supplied adaptor, and is suitable for powering data recorders, data loggers, and frequency analyzers.
Original Press Release:
Larson Davis Microphone Power Supply Offers Enhanced Battery Life
February 8, 2007, Depew, NY, USA - Larson Davis, a division of PCB Piezotronics, Inc., has introduced the addition of Model 2221 power supply to its growing line of acoustic accessories. Model 2221 is a single-channel power supply, designed for use with traditional, externally polarized condenser microphones. The 2221 has the ability to supply 0 Volt or a 200V polarization voltage. User selectable features include a flat (Z), A, or C-weighting filters and a 0, 20 or 40 dB gain switch. One of it features is the enhanced battery life, which can last up to 40 hours on a set of AA batteries. This battery life can be approximately doubled when using e-Lithium batteries. The unit can also be run with on-line power via supplied adaptor. The product is a perfect compliment to data recorders, data loggers and frequency analyzers.
Larson Davis carries a full compliment of the prepolarized condenser microphone and preamplifiers. Powered by a 2-20 mA signal conditioner and standard coaxial cables, these modern designs have become extremely popular due to its significant savings in power supplies and cabling, and "ease of use" characteristics. The prepolarized designs can be used with the same constant current source required for ICP¢ accelerometers. This affords the user the luxury of using the microphones along side the accelerometers, in the same test, minimizing set-up time. Besides the modern prepolarized designs, Larson Davis also offers the traditional externally polarized microphones that run off of a 200V power supply.
For detailed product specifications, drawings or additional information, please visit www.larsondavis.com.
PCB and ICP are registered trademarks of PCB Group, Inc.
PCB PIEZOTRONICS, INC.
3425 Walden Avenue, Depew, New York 14043-2495 USA
Toll Free: 800-828-8840 Fax: 716-684-0987
24-hour SensorLineSM: 716-684-0001
E-mail: mktg@pcb.com
Web site: www.pcb.com
ISO 9001:2000 Certified
A2LA Accredited to ISO 17025
