Applications
- Provides power for microphones, accelerometers and other CCLD-compatible transducers
- Two channels for cross and FRF measurements
- 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
| Fonctionnalités
- Industry standard CCLD power is compatible with wide range of DeltaTron® and ICP® sensors
- Powered and charged from PC's USB connector: no need for an extra mains adaptor
- 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
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Type 1704-A-002 provides two channels of CCLD (Constant Current Line Drive) power for CCLD transducers such as microphones, accelerometers, and tachometer probes.
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 using any of the above trade names.
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
Type 1704-A-002 has all its connectors, switches and status LEDs located on the front of the unit (see Fig. 1).
Flexible power options
Type 1704 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 a powered USB port of a computer using the optional USB cable.
The built-in rechargeable battery is not only more convenient than replacing non-rechargeable batteries but also makes for a lower cost of ownership. The rechargeable battery has at least 500 cycles, each lasting for 13 hours.
Gain and Filtering
Type 1704 includes analogue gain and filtering. Available gains settings include ×1 (0 dB), ×10 (+20 dB) and ×100 (+40 dB). Adding gain before the analogue to digital conversion can improve the system’s noise floor. Likewise, the selectable acoustic band-pass filter can remove unwanted frequencies before the analogue to digital conversion. An A-weighting type 0 filter is also selectable.
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