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DC-21 spectrum analyser and data collector

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DC-21 spectrum analyser and data collector

The DC-21 is a fully digital, two-channel spectrum analyser and data collector. It is designed to meet all requirements for condition monitoring, diagnostics and balancing.

With a lightweight aluminium allow casing, it has an improved environmental protection rating (it is dust and splash proof).

The DC-21 is equipped with an easily replaceable battery. Its functionalities can be expanded by a simple software update.

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Applications Fonctions et caractéristiques En savoir plus

The DC-21 is a fully digital, two-channel spectrum analyser and data collector. It is used for the following applications:

  • Monitoring machine condition and diagnostics
  • Rotor balancing
  • Analysis for commissioning machines
Entrées
Type of sensor Accelerometer, microphone, tachometer
Number of channels 2 analogue channels / 1 synchronisation channel
Intégration Analogue (1 stage) / Digital (1 or 2 stages) / TTL
Frequency range 0.1 - 25,600 Hz
Frequency range 0,5 - 256000 Hz
Linear input signal range + or - 3V
Phase difference between channels From 2..300 Hz just below 1 degree / From 301... 1000 Hz 5 degrees or less
Between channel interference -100dB or more
Gain Auto, 0.54dB in 6 dB steps
Vibration parameters
Measured amplitudes Displacement, velocity, acceleration, peak factor
Detector RMS, true peak, peak to peak
Frequency bands for vibration: - ISO Standard: - Add: 2..1000, 10.. 1000, 10.. 2000 Hz 2..200, 3..300, 5..500, 10..5000, 500..2500, 625..1250, 1200..2500, 2500..5000, 5000..10000, 10000..25000 Hz
Vibration range: - Acceleration (out of 160 Hz) - Velocity (out of 80 Hz) - Displacement (out of 40Hz) From 0.05 to 1,000 m/s² From 0.1 to 100 m/s² From 1 to 1,000 um
FFT spectra
Frequency span 25, 50, 100, 200, 400, 800, 1,600, 3,200, 6,400,12,800,256,000 Hz
Frequency resolution 400, 800, 1,600 lines
Dynamic range 90 dB or more
Number of linear averages 1 - 256
Weighting function Hanning
Scale type Linear or logarithmic
Envelope detector with band pass filter: - 1/3 octave - 1/1 octave 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000, 5000, 6400, 8000, 10000, 12800, 16000, 20000 Hz 50, 100, 200, 400, 800, 1600, 3200, 6400, 8000, 12800, 16000 Hz
Amplitude and phase measurements for balancing
Rotation speed: RPM error Phase error Amplitude error Automatic control 0.5- 1700 Hz (30-102,000 RPM) + or - 1% + or - 5 degrees + or - 1 dB
Automatic control Phase reference tacho signal parameters, reliability of measurements
Amplitude measurement units G, m/s², mm/s, um, in/s, mil (RMS, Peak, peak to peak)
Internal power supply for phase reference tacho 5 V DC, 15 mA
PM-amplitude-frequency measurements for run-up/coast-down
Rotation speed 0.5-1700 Hz (30-102,000 RPM)
Frequency range from 0.5 Hz up to 10xRPM
RPM resolution Up to 200 harmonic lines
Measurements taken 1-6th harmonics of rotation speed
General
Operating temperature -20/+50°C (5/+120F)
Weight 0.9 KG
Dimensions 109 (W) x 208 (L) x 35 (H) mm
Operating time 10 hours with reserve battery
Battery charging time 2 hours
Data storage capacity 800 spectra