Rion DA-20 Data Recorder

The DA-20 epitomises how portable data acquisition (such as audio or vibration signal recording) should be. Quick, simple, flexible, portable, battery-powered and storing data in a standard file format to portable media that can be opened and analysed without recourse to specific bespoke software. When you choose a DA-20 for in-situ data acquisition you will be storing data long before you would have figured out how to get started with most data acquisition systems. The DA-20 records wav files (up to 4 channels) onto compact flash cards. Input and analogue output are via standard BNC connectors and CCLD line drive accelerometers can be connected directly. Designed for the rigours of in-situ use, the DA-20 is perfect for measuring noise and vibration inside vehicles and in other locations where you can’t practicably or would prefer not to attach sensors directly to the fixed system you are going to use for analysis.

In the March 2007 DEFRA NANR172 report into Human Response to Vibration in Residential Environments the Rion DA-20 was selected as the preferred equipment option for data acquisition on the basis that is provided the best combination of functionality and cost.

  • Records up to 4 channel 16 bit wav files
  • Data recorded onto compact flash for easy and quick data transfer
  • Frequency range d.c. – 20 kHz
  • 80 dB dynamic range
  • Input voltage ranges (peak) 0.01V, 0.0316V, 0.1V, 0.316V, 3.16V and 10V
  • Frequency ranges 100, 500, 1000, 5000, 10 000 and 20 000 Hz (sample rate selectable 2.4x or 2.56x)
  • 10 Hz High Pass and 100, 500 and 1 kHz Low Pass Filters (all filters can be switched off)
  • Supports direct connection of suitable microphone pre-amplifiers and accelerometers
  • 2 mA 18V power supply for CCLD devices (e.g. line drive accelerometers or microphone pre-amplifiers such as the Rion PV-41
  • Accelerometers or NH-22 Pre-Amp)
  • Charge accelerometers supported if used with Rion VP-80 3 Channel Charge Amplifier (Option)
  • Can be powered from standard internal batteries (4 x AA cells) or external (6V d.c.) supply
  • Up to 10 hours battery life on internal batteries when CCLD off and up to 5 hours with CCLD supply on
  • Very small, light and compact (175mm x 140mm x 45 mm and less than 600g including batteries)
  • Really simple to operate with physical tape-recorder type buttons for record and play functions and a logical and intuitive menu structure for setting the instrument up
  • Clear backlit LCD display which shows real time input levels as bar graph display
  • Supplied with free Viewer software for reviewing signals
  • Up to 2GB Compact Flash Cards supported
  • Available recording time dependent upon user-selected frequency range and number of channels but for example (with a 2GB card) 1 channel up to 20 kHz – 5 hours 20 minutes, 3 channels up to 500 Hz 71 hours and 6 minutes
  • Recording can be continuous or internally or externally triggered by level (0, 1 and 5 second pre-trigger periods available)