Portable Dynamic Signal Analyzer - DU-844D  Portable Dynamic Signal Analyzer - DU-844D

The DU-844D Portable Dynamic Signal Analyzers is specially designed for modal experiment of force measurement method. Connecting to IEPE acceleration sensor and force sensor, DU-844D can be used for structural vibration test, as well as experimental modal analysis using hammer excitation method and exciter excitation method.

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  • Product Description
  • Specifications
  • System Configurations
  • Software
  • Modules/Accessories

 Compact, portable, easy to use, suitable for on-site testing

 Built-in 24V/4mA biasing circuit, support IEPE sensors

 Independent 24-bit A/D converter per channel with selectable sample rate of up to 128kHz for high resolution data

 Built-in Butterworth low-pass filter, Butterworth high-pass filter and Anti-aliasing filter

 High Performance DMA Data Transfer

 Run on USB3.0 power, ideal for portable applications, no external power supply needed

 Suport TEDS

Number of Input Channels4 IEPE input channels
Input CouplingSin_DC, Dif_DC, AC, Sin_IEPE
Full-scale Voltage Value±0.05V, ±0.5V, ±5V
Indication Error<0.5% of F.S.
     Transfer CharacteristicButterworth low-pass filter
     Cut-off Frequency (-3dB±1dB)10Hz, 30Hz, 100Hz, 300Hz, 1kHz, 3kHz, PASS
     Flatness<0.1dB (Within 2/3 of cutoff frequency)
     Stop-band Attenuation- 18dB/Oct.
     Transfer CharacteristicButterworth high-pass filter
     Cut-off Frequency (-3dB±1dB)0.3Hz, 1Hz, 3Hz, 10Hz
     Flatness<0.1dB (Above 2 times cut-off frequency)
     Stop-band Attenuation ≥-12dB/Oct.
A/D Converter24 bits 
Freq. ResponseDC ~ 50kHz (+0.5dB ~ -3dB)
Max. Sampling Rate128kHz
Anti-aliasing filter
     Cut-off Frequency1/2.56 of sampling rate
     Stop-band Attenuation≥-100dB/Oct.
     Flatness±0.1dB (Within analysis frequency range)
Power SupplyUSB power, 5W
WeightApprox. 410g
Environmental Conditions
     Operating Temperature- 10°C to 50°C
     Operating Humidity20 ~ 90%RH@40°C
     Storage Temperature- 40°C to 60°C
     Storage Humidity90% RH24h@50°C
     VibrationFrequency cycle range: 55Hz ~ 555Hz ~ 5Hz
Drive amplitude (peak): 0.19mm
Sweep frequency: ≤1Oct./min
Duration of resonant: 10min
Vibration direction: x, y, z

Figure 1  System Block Diagram

 DE-BPS Basic Platform Software

  • Running on XP/Win7/Win8/Win10 operating system

  • Parameters setting, Function control, Real-time/post-acquisition analysis, data browsing, cursor readouts, scaling curve, data management and simple processing, report generation, long-term continuous data recording, etc.

 Spectrum Analysis Module (Optional)

  • Real-time and post FFT analysis, power spectrum analysis, frequency amplitude and phase, real and imaginary frequency, windowing, overlop, average

 Frequency Response Analysis Module (Optional)

  • Built-in multiple frequency response estimation method, supports MIMO, frequency analysis and response, coherence function, impulse response

 Modal Analysis Module (Optional)

  • Frequency response function method (including MIMO), environmental incentive modal analysis, SSI, characteristics of the system with random subspace algorithm ERA, strengthen EFDD frequency domain decomposition method, frequency domain identification methods, such as reference more complex index method (PolyLSCF)

 LC02 Impact Hammer
  • Gain: 0.5mV/pC

  • Sensitivity: 4pC/N

  • Range: 5000N

  • Resonant Frequency: >22kHz

  • Nonlinearity: ≤1% of F.S.

  • Output Signal (Peak): >5VP

  • Output Impedance: <100Ω

  • Power Supply: 20~30VDC/2~20mA

 1A102E IEPE Accelerometer
  • Sensitivity: ~1mV/m·s-2

  • Range: 5000m·s-2

  • Frequency: 1 ~ 10000Hz±10%

  • Resonant Frequency: >35kHz

  • Resolution: 0.01m·s-2

  • Output mode: 3-M5

  • Operating Temperature: -40°C to 120°C

  • Mounting: M5 screws

  • Dimensions: Φ10×22mm

  • Weight: Appro. 6g

 1A302E IEPE Triaxial Accelerometer
  • Sensitivity: ~1mV/m·s-2

  • Range: 5000m·s-2

  • Frequency: 0.5 ~ 4000Hz±10%

  • Resonant Frequency: >18kHz

  • Resolution: 0.01m·s-2

  • Output mode: 3-M5

  • Operating Temperature: -40°C to 120°C

  • Mounting: 2-Φ3

  • Dimensions: 24×24×12mm

  • Weight: Appro. 26g

 DT-CZ002P Magnetic Base
  • 8Kg Magnetic force

  • M5 thread, plane, Φ20.5×12.5mm

 45-6 Model Packing Case

 USB3.0 Cable
  • 1.5m

 IEPE Signal Cable
  • 3m

 BNC Cable
  • 3m


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