Dynamic Signal Test and Analysis System - DE-944 Dynamic Signal Test and Analysis System - DE-944

The DE-944 is a synchronous-sampling, multi-functional Dynamic Signal Test and Analysis System designed for the strength and life evaluation test of large structure. DE-944 supports simultaneous sampling of 32/64 analog input channels with software-selectable GND, Sin-DC, Dif-DC, AC, Sin-IEPE, Dif-IEPE input configuration for measuring various of physical quantities, such as voltage, current, stress, strain, pressure, temperature, vibration and so on. If more than 64 analog input channels are required, multiple DE-944 can be expanded and synchronized via the Gigabit Ethernet switch, Synchronous clock box and Device-to-Device Bus to support over 1000 AI channels simultaneously sampling.

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

 Independent 24-bit A/D converter per channel with the sampling rate of up to 256kHz

 Built-in bridge completion and Excitation

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

 Built-in low-pass filter and anti-aliasing filter

 Suport EID and TEDS

 On-site self-checking function of stress/strain channels is supported to get the current state quickly

Number of Input Channel4 channles/card, 8/16 card slots
Input CouplingGND, Sin-DC, Dif-DC, AC,   Sin-IEPE, Dif-IEPE
Input Impedance10MΩ+10MΩ
Full-scale Voltage Value±0.1V, ±0.2V, ±0.5V, ±1.0V,   ±2.0V, ±5.0V, ±10.0V
Indication Error0.2% of F.S.
Nonlinearity0.1% of F.S.
Channel to Channel Isolation≥80dB
Strain Measurement
     Full-scale Strain Value±1000με, ±10000με, ±100000με
     Indication Error≤0.5%±3με
     Zero Drift≤3με/2h
     Self-Balancing Range±20000με
Bridge Excitation
     Bridge ConfigurationFull, Half, Three-wire quarter bridge
     Bridge Completion Resistors

120Ω/350Ω (Three-wire quarter bridge)

50Ω~10000Ω (Half bridge / Full bridge)

     Bridge Voltage2V, 5V, 10V, 24V DC
     Max. Current30mA
     Cut-off requency (-3dB±1dB):30Hz, 300Hz, 3kHz, PASS
     Flatness: <0.1dB Within 1/2 of cut-off frequency
     Stop-band Attenuation: ≥-18dB/Oct.
CommunicationGigabit Ethernet / USB 3.0
A/D Converter24 bits
Freq. ResponseDC ~ 100kHz (+0.5dB ~ -3dB)
Sampling rate

256kHz/channel for simultaneous sampling of 32 channels

128kHz/channel for simultaneous sampling of over 32 channels

Anti-aliasing filter
     Cut-off Frequency1/2.56 of sampling rate
     Stop-band Attenuation:- 120dB/Oct. 
     Flatness: ±0.05dB Within analysis frequency range
Power Supply100 ~ 240VAC / 10 ~ 30VDC, 160W (32 channles) / 320W (64 channles)
     Semi-19" Chassis237×133×338mm
     19" Chassis482×133×338mm
     Semi-19" Chassis (32 channels)Approx. 7kg
     19" Chassis (64 channels)Approx. 12kg
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: 5Hz ~ 55Hz ~ 5Hz
Drive amplitude (peak): 0.19mm
Sweep frequency: ≤1Oct./min
Duration of resonant: 10min
Vibration direction: x, y, z

Figure 1  Single system block diagram

Figure 2  Multi-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.

 DE-944 DAQ Card

  • 4 input channels

  • Support GND, Dif-DC, Sin-DC, AC, Sin-IEPE, Dif-IEPE, three-wire 1/4 bridge, 1/2 bridge and full bridge input

  • Full-scale voltage value from ±0.1V to ±10.0V

  • Full-scale strain value from ±1000με to ±100000με

  • Independent 24-bit A/D converter per channel with continuous sample rates of up to 256kHz

  • System uncertainty within 0.2% of F.S.

  • Frequency response range from DC to 100kHz

 DE-92U Semi-19" 3U chassis
  • CPU based on on-chip system (SOC)

  • 8 Card Slots

  • Including control card, Gigabit Ethernet communication Interface

  • 100 ~ 240VAC / 12VDC power supply

 DE-93U 19" 3U chassis
  • CPU based on on-chip system (SOC)

  • 16 card slots

  • Including control card, Gigabit Ethernet communication Interface

  • 100 ~ 240VAC / 12VDC   power supply

 DT5857-8 Charge Conditioner (Optional)
  • 1 input channel

  • Max. input charge: 105pC

  • Input Impedance: >1011Ω

  • Amplifier output sensitivity: 0.1mV/pC and 10mV/pC

  • Indication error: <1%

  • Noise:<10×10-3pC

  • Max. bandwidth: 0.3Hz ~ 1MHz (+0.5dB ~ -3dB)

  • Distortion:<0.5% (<30kHz)

 DT5856-8 IEPE Quadratic Integral Conditioner (Optional)
  • Built-in 24V/4mA biasing circuit

  • Amplifier bandwidth: DC ~ 300kHz (+0.5dB ~ -3dB)

  • Distortion:<0.5%(within 30kHz)

  • Integral type: No integral, Primary integral, Quadratic integral

  • Integral Frequency Range: 

        Primary integral: 10Hz ~ 10kHz or 1Hz ~ 1kHz

        Quadratic integral: 10Hz ~ 1kHz or 1Hz ~ 100Hz

  • Integral Error:

        Primary integral:<3%

        Quadratic integral:<5%

  • Dimensions: 50mm(W)×35mm(H)×110mm(L)

 DT3811-8 Current Loop Conditioner (Optional)
  • 1 input channel

  • Suitable for 2-wire / 3-wire 4 ~ 20mA sensor

  • 24V DC power supply

 DT3814-8 Thermistor Conditioner (Optional)
  • 1 input channel

  • Suitable for Pt10, Pt100, Pt1000 sensors

  • Measuring temperature range from -200℃ to 850℃

  • Accuracy: 0.5%±0.5℃

  • Iout:1mA±2μA

 TC-01 Tachometer / Counter Module (Optional)
  • Number of channel:2 input channels

  • Rotation rate measurement

        Range: 30 ~ 600000 rpm
        Accuracy: ˂0.05%±1r
        Input signal pulse width: 10μs

        PPR: 1 ~ 4096

  • Counter measurement

        Operating mode: support positive/reverse, pulse accumulative count, pulse count per unit time
        Reset mode: manual/atuomatic   

        Pulse count range: 0 ~ 100k/s

  • Power supply: 5VDC/50mA

 DT5944 Signal Source Output Card (Optional)
  • Number of Channel: 2 channels

  • Voltage Range: ±10VP

  • Current: Max. 5mA

  • Frequency: 0.1 ~ 20kHz

  • D/A Resolution: 24 bits

  • Accuracy: 1% within 2kHz

  • Signal type: constant frequency sine wave, sweep frequency sine wave, square wave, random, burst random

 DT5945 CAN Bus Card (Optional)
  • Number of channel:2 channels

  • Protocol: CAN2.0B

  • Baud rate: 4800bps ~ 1Mbps

  • Communication mode: duplex CAN bus for sending and receiving

  • Minimum sending interval: 1s

  • Support dbc file import

  • Supports standard and extended frame formats

 DT5946 RS485 Communication Card (Optional)
  • Number of channel:2 channels

  • Baud rate: 1200bps ~ 115200bps

 DT5947 Digital I/O Card (Optional)
  • Number of channel: 8-Ch DI and 8-Ch DO

  • Digital input: Support Dry/Wet Contact

  • Digital output: Power Output (Ch1-Ch4) and TTL Output (Ch5-Ch8)

  • Power Output: Max. 24V/1A

 DT5611A Synchronization Box (Optional)
  • 8 inputs

  • Built-in synchronization clock distributor

  • Support multiple clock box cascade connection

  • 19" 1.5U chassis.

 C-4 Cable
  • 4-core cable

  • Default 5m bare cable or 1.5 m cable with bridge box


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