BRUEL & KJAER 2671-W-001 Product Data

PRODUCT DATA
CCLD Microphone Preamplifier Type 2671-W-001
CCLD Microphone Preamplifier Type 2671-W-001 enables you to
make acoustical measurements with a CCLD input module. You
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can connect ½ prepolarized microphones to the preamplifier. The
preamplifier's low output impedance allows problem-free use of
long extension cables. The robust, compact design means that you
can use Type 2671-W-001 over a wide range of environmental
conditions.
Uses
• Low price, multichannel sound measurement setups with
½" Brüel & Kjær prepolarized condenser microphones
• Multichannel signal analysis measurements
• Multichannel sound power measurements
• Industrial machinery noise measurements
Features
• Optimised noise specifications
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• ICP compatible
• BNC connector for easy installation and use with inexpensive
BNC cables
• Connects directly to CCLD sockets and to LEMO sockets
with adaptor
Introduction
CCLD Microphone Preamplifier Type 2671-W-001 is very
compact and operates over a wide range of temperature,
humidity and other environmental conditions. It has a very high
input impedance, presenting virtually no load to the microphone.
Its low output impedance means that you can connect long
cables between the preamplifier and measurement equipment.
Description
CCLD products operate on a constant-current power supply and
give output signals in the form of voltage modulation on the
power supply line. One of the advantages of this is that you can
use inexpensive BNC coaxial cables.
• Low output impedance allows long extension cables to
be used
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• Falcon Range product
• Supports "Smart transducer Interface" IEEE 1451.4 containing
TEDS (Transducer Electronic Data Sheet
The preamplifier converts the CCLD supply, which must be
between 2 and 20 mA (nominal 4 mA), into a constant 12 V DC
voltage level. The output signal from the microphone swings
around this DC level. Since no polarization voltage is available,
only prepolarized condenser microphones can be used. This
preamplifier is also available in a version with a 20 Hz high-pass
filter (Type 2671) and in a version with built-in A-weighting
(Type 2699).
TEDS
"Supports TEDS" means that the preamplifier can be used with
the Smart Transducer interface according to IEEE 1451.4. The
ability to store and recall TEDS data drastically reduces test
setup time and allows cost savings in most measurement
situations.