PRODUCT DATA Battery-powered CCLD Signal Conditioners: Type 1704-A-001, one-channel, and Type 1704-A-002, two-channel Type 1704-A is a range of CCLD conditioner/amplifiers designed for field and lab use. It includes features like a built-in, rechargeable battery optimised for in situ measurements. They provide signal conditioning, amplification and gain for CCLD compatible: • Accelerometers • Charge Accelerometers (using Type 2647 Inline charge amplifier) • Microphones • Tacho Probes Uses and Features • Provides power for microphones, accelerometers and other CCLD-compatible transducers • Industry standard CCLD power is compatible with wide range of DeltaTron® and ICP® sensors • Built-in Li-Ion battery and charger – ready to measure when you are • Powered and charged from PC's USB connector (with optional cable): no need for an extra mains adaptor • Wide range of gains (×1, ×10 and ×100) amplify signal before A/D to improve noise floor • Selectable acoustic bandpass and A-weighting (type 0) filters remove unwanted frequencies • Switches to quickly change settings and LEDs for fast verification of configuration • Both 2 × BNC and 3.5 mm stereo output connectors provide options to connect to A/D converters or sound cards Description Fig. 1 Connectors, switches and LEDs on Type 1704-A-002: 1) CCLD power for accelerometers, microphones and tacho probes; 2) LED overload and CCLD cable fault detection; 3) BNC outputs for connection to instrumentation; 4) 3.5 mm stereo socket for soundcard connection; 5) CCLD On/Off − can be used without CCLD power as voltage amplifier and filter; 6) Gain and filters to improve dynamic range; 7) 13 hours of battery life; 8) USB Micro-B for powering and charging The Type 1704-A range of conditioners provides CCLD (Constant Current Line Drive) power for CCLD transducers such as microphones, accelerometers, and tachometer probes. Type 1704-A-001 is a onechannel version while Type 1702-A-002 is a two-channel version. CCLD power is a de facto standard in the dynamic test and measurement world and has many manufacturer specific names such as DeltaTron®, ICP® (Integrated Circuit Piezoelectric), IEPE (Integrate Electronics Piezoelectric) and ISOTRON®. Type 1704 CCLD signal conditioners are compatible with transducers u

CCLD conditioning has advantages because it allows the transducer power to be delivered using the same coaxial cable that the transducer uses to return the measurement signal. This reduces cabling costs and improves noise immunity compared to multi-conductor cables. Connectors The Type 1704-A range of conditioners have all their connectors, switches and status LEDs located on the front of the unit (see Fig. 1). Flexible Powering Options Type 1704-A uses a Micro-B USB connector for power and charging the built-in rechargeable battery. Power comes from either the provided mains adaptor or from...

Brüel & Kjær's Family of CCLD DeltaTron Signal Conditioners Type 1704-A is part of a larger family of CCLD DeltaTron signal conditioners. From small, battery- or USBpowered units to large, computer-controlled systems, Brüel & Kjær has a unit to fit your needs. Table 1 Features of Brüel & Kjær's Family of CCLD DeltaTron Signal Conditioners Battery Power Manual Control Computer Control Read Transducer's Electronic Datasheet (TEDS) Uni (Fine) Gain Adjustment Multiplexer Output Number Channels per Unit Maximum Number Channels from one PC Maximum Frequency (kHz at filters −5% point) Minimum Frequency...

Specifications – Type 1704-A Gain ×1 (0 dB) Input Connector Output Connector Amplifier Gain Gain Tolerance Excitation Voltage Excitation Current Maximum Input Voltage (peak) Input Protection Maximum Output Voltage (peak) Output Impedance Cable Fault Voltage Levels Total Harmonic Distortion Linear (none), Acoustic Bandpass, A-weighting (type 0) Acoustic Bandpass Filters Spectral Output Noise Lin. (μV/√Hz) with internal Acoustic Bandpass filter CCLD Powered Enabled, Linear filter Direct (CCLD Off), Linear filter Broadband Electrical Output Noise, Lin. (μVrms) Broadband Output Noise (μVrms) post-processed...