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Model 378A08 MICROPHONE AND PREAMPLIFIER, LOW NOISE, 1/4" FREE-FIELD PREPOLARIZED Installation and Operating Manual For assistance with the operation of this product, contact the PCB Piezotronics, Inc. Toll-free: 716-684-0001 24-hour SensorLine: 716-684-0001 Fax: 716-684-0987 E-mail: info@pcb.com Web: www.pcb.com...
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Assistance is needed to safely operate equipment PCB Piezotronics is an ISO-9001 certified company whose Damage is visible or suspected calibration services are accredited by A2LA to ISO/IEC Equipment fails or malfunctions 17025, with full traceability to SI through N.I.S.T.
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CAUTION Refers to hazards that could damage the instrument. NOTE Indicates tips, recommendations and important information. The notes simplify processes and contain additional information on particular operating steps. The following symbols may be found on the equipment described in this manual: This symbol on the unit indicates that high voltage may be present.
PRODUCT GUIDE 377 SERIES MICROPHONES 426 SERIES PREAMPLIFIERS Contents: Introduction ................1 Standards ..................1 Setting up a Microphone Measurement System ......1 Taking Measurements ..............3 Accessories and Miscellaneous ..........3 Maintenance ................4 Calibration .................. 5 Warranty and Service ..............5 1.0 Introduction Thank you for your purchase of a PCB high quality microphone.
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Phantom powered microphone systems use a 3 pin XLR connector. A phantom powered microphone sys- tem should use a 48V phantom power supply or signal conditioner for optimum performance; however these microphone systems may be powered with a 24V or a 12V phantom power supply, but this will limit the maximum output voltage.
4.0 Taking Measurements The following formula is used to calculate the pressure measured by the microphone from the output voltage signal. The sensitivity of a microphone is typically measured at 250 Hz. Pressure (Pa) = Voltage (mV) / Sensitivity (mV/Pa). The lowest amplitude a healthy human ear can detect is 20 millionths of a Pascal (20Pa).
Windscreens and Nose cones Wind induced noise can be reduced by using a windscreen. This can offer some protection against dust particles and mechanical damage. In the presence of high-speed airflow from a well-defined direction, such as wind tunnels, a nose cone is recommended. When using windscreens and noise cones, the frequency response of the microphone will be attenuated at higher frequencies.
Class1 and IEC 60942-2003, Class 1, Sound Calibrators. 8.0 Warranty and Service All equipment and repair services provided by PCB Piezotronics, Inc. are covered by a warranty against defective material and workmanship under a Total Customer Satisfaction policy. If, at any time, for any reason, you are not completely satisfied with any PCB product, PCB will repair, replace, or exchange it at no charge.
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All specifications are at room temperature unless otherwise specified. 3425 Walden Avenue, Depew, NY 14043 In the interest of constant product improvement, we reserve the right to change specifications without notice. ® is a registered trademark of PCB Piezotronics, Inc.
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REVISIONS the information disclosed hereon. Neither it nor any reproduction thereof will be disclosed to others .28 [ 7.0] DESCRIPTION without the written consent of PCB Piezotronics Inc. RELEASED TO DRAFTING 55015 M6.5x0.3 - 4g MICROPHONE CARTRIDGE .41 [10.4] .50 [12.7]...
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