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Outline
The DA-21 is a compact, lightweight data recorder designed for waveform
recording. The unit can be powered from batteries, for convenient use in the
fi eld.
To record sound or vibration waveforms, microphones or accelerometers can
be connected easily. The capability for sensor drive power supply (CCLD) is
also provided. Unlike with conventional units having only general-purpose
connectors, the design of the DA-21 eliminates the need to set up additional
connection equipment, allowing quick and uncomplicated recording start.
Features
The unit has the following features.
Simultaneous recording of electrical signals in up to 4 channels.
Compact and lightweight body ensures easy portability. A set of four
IEC LR6 (size AA) alkaline batteries will power the unit for about
8 hours of continuous use (at 23ºC, frequency range setting 100 Hz,
4-channel input, CCLD off, backlight off).
CCLD support allows easy hookup of sensors including microphones
and accelerometers.
A wide range of sensors for converting sound pressure, vibrations,
rotation, temperature or other measurement quantities into an electrical
signal (AC or DC) is supported. Measurement quantities measured
by sensors are displayed in units “V”, “V/EU”, “mV/(m/s
2
)” or “dB”
with a user selectable setting range.
Frequency range from DC to 20 kHz allows recording of a wide range
of phenomena.
Recorded data are stored on SD memory card in WAVE format. For
example, when using a 32 GB card, available recording time with the
20 kHz frequency range setting and continuous recording in 4 input
channels is about 23 hours.
Voice memo and marker information can also be recorded, to facilitate
later data management.
Summary of Contents for DA-21
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