Isolated Dynamic Signal Test and Analysis System - DE-918
The DE-918 Isolated Dynamic Signal Test and Analysis System employs advanced isolation technology and multilayer shielding design to effectively suppress both radiated and conducted interference. With its superior comprehensive performance, the system guarantees accurate signal measurement even in high-radiation and strong electromagnetic interference environments.
Modular design, expandable to over 500 channels via Gigabit Ethernet
Super anti-interference ability comes from the high isolation of input-output and channel-channel, multi-layer shielding and reasonable grounding
Independent 18-bit SAR A/D converter per channel with selectable sampling rate of up to 200kHz
Built-in bridge completion and excitation
Built-in 24V/4mA biasing circuit, support IEPE sensor
Built-in Butterworth low-pass filter and anti-aliasing filter
DMA for real-time, high speed, stable data transmission
Suport EID and TEDS
Input protection and signal state indication
| Name | Detail |
|---|---|
| Number of input channels | 1 channel/card, 8 card slots (19" 3U chassis) |
| Input Coupling | GND, Dif-DC, Sin-DC, AC, IEPE |
| Input Impedance | 30MΩ/100pF |
| Input Voltage Range | ±0.005V, ±0.01V, ±0.02V, ±0.05V, ±0.1V, ±0.2V, ±0.5V, ±1V, ±10mV, ±1.0V, ±10V |
| Indication Error | <0.05% of F.S. |
| Stability | <0.01%/24h |
| Nonlinearity | <0.005% |
| Distortion | ≦0.5% |
| Noise | ≦2μVRMS |
| CMV | <1μV/24h |
| CMR | ≧120dB |
| Strain Measurement | |
| Input Strain Range | ±1000με, ±10000με, ±100000με |
| Bridge Excitation | |
| Bridge Configuration | Full, half, three-wire quarter bridge |
| Bridge Completion Resistors | 120Ω, 350Ω (Three-wire quarter bridge), 50Ω~10000Ω (Half bridge/Full bridge) |
| Bridge Voltage | 2V, 5V, 10V, 24V DC Within 0.01% |
| Current | Max. 50mA |
| LPF | Butterworth low-pass filter |
| Cut-off Frequency (-3dB±1dB) | 1Hz, 5Hz, 10Hz, 30Hz, 100Hz, 300Hz, 1kHz, 3kHz, 10kHz |
| Flatness | <0.1dB Within 2/3 of cutoff frequency |
| Stop-band Attenuation | >-18dB/Oct. |
| Communication | Gigabit Ethernet |
| A/D Converter | 18-bit SAR |
| Freq. Response | DC~100kHz (+0.5dB~ -3dB) |
| Max. Sampling Rate | 256kHz |
| Anti-aliasing filter | |
| Filtering Mode | Analog filter and real-time digital filter |
| Cut-off Frequency | 1/2.56 of sampling rate |
| Stop-band Attenuation | >-150dB/Oct. |
| Flatness | ±0.1dB Within analysis frequency range |
| Power Supply | 100 to 240VAC, 50–60Hz, 100W |
| Dimensions | 482 × 133 × 338 mm |
| Environmental Conditions | |
| Operating Temperature | -10 to 50°C |
| Operating Humidity | 20–90%RH @40°C |
| Storage Temperature | -40 to 60°C |
| Storage Humidity | 90%RH 24h@50°C |
| Vibration |
Frequency cycle range: 5~55~5Hz Drive amplitude (peak): 0.19 mm Sweep frequency: ≦1 Oct./min Duration of resonant: 10min Vibration direction: x, y, z |
Figure 1 Single System Block Diagram
Figure 2 Multi-System Block Diagram
DE-BSP Basic Platform Software
Core Features
Integrated Analysis Modules
Data acquisition and basic signal processing
Order analysis and field dynamic balancing
Impact waveform detection
Experimental modal analysis
Acoustic analysis
Smart Operation System
Modular management for simplified workflow
Automatic system parameter identification
Fully programmable instrument settings (range, filtering, sampling)
Virtual instrumentation with one-click configuration
Technical Specifications
Unified Platform Architecture
Supports multiple DAQ system types on single platform
Visual parameter configuration with real-time status monitoring
Data Management
Intelligent project organization for large-scale experiments
Batch processing and automated report generation
Multiple sampling modes (triggered/continuous)
Advanced Analysis Capabilities
Flexible channel grouping
Custom data flow configuration
Real-time processing (acquisition, storage, display, analysis)
Visualization Tools
Global data navigation
Multiple display modes:
Digital tables and bar charts
X-Y plotters and FFT views
Octave analysis, 2D/3D visualization
Reporting & Output
Interactive Word report generation
Multi-format export capabilities
Customization & Expansion
Open development interface
Plugin architecture for user-created modules
Shared plugin repository
Distributed System Support
Multi-client operation:
Main control terminal (full system control)
Display terminals (remote monitoring)
View layout management for field applications
Selective data storage based on bandwidth
DE-918 DAQ Card
1 input channel
Support DC, AC, GND, IEPE, three-wire 1/4 bridge, 1/2 bridge, and full bridge Inputs
Full-scale voltage value from ±0.005V to ±10.0V
Full-scale strain value from ±1000με to ±100000με
Independent 18-bit SAR A/D converter per channel with selectable synchronous continuous sampling rate of up to 200kHz
Frequency response range from DC to 100kHz
Anti-common mode voltage up to ±500V
CMRR over 120 dB
19" 3U Chassis
CPU based on on-chip system (SOC)
8 card slots
Including control card, Gigabit Ethernet communication interface
100 ~ 240V AC, 50-60Hz power supply
DT5857-8 Charge Conditioner (Optional)
1 input channel
Max. input charge: 10^5pC
Input Impedance: >10^11Ω
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)
DT5855-8 Charge Quadratic Integral Conditioner (Optional)
Max. input charge: 10^5pC
Amplifier output sensitivity: 0.1mV/pC and 10mV/pC
Indication error: <1%
Noise: <10×10^-3pC
Max. bandwidth: 0.3Hz ~ 300kHz (+0.5dB ~ -3dB)
Distortion: <0.5％ (Within 30kHz)
Integral type: No integral, Primary integral, Quadratic 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: 50×35×110mm
DT5856-8 IEPE Quadratic Integral Conditioner (Optional)
Built-in 24V/4mA biasing circuit
Amplifier bandwidth: 0.3Hz ~ 100kHz (+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: 50×35×110mm
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
DT3811-8 Current Loop Conditioner (Optional)
1 input channel
Suitable for 2-wire / 3-wire 4 ~ 20mA sensor
24V DC power supply
DE-9-S Signal Source Module (Optional)
2 channels
2 irrelevant sources
TM03 Tachometer (Optional)
2 input channels
30r/min ~ 300,000r/min or 5r/min ~ 20,000r/min
PPR: 1 ~ 512
DT5611A Synchronization Box (Optional)
8 inputs
Built-in synchronization clock distributor
Support multiple clock box cascade connection
19" 1.5U chassis.
C-1 Cable
1-core cable
Default 5m bare cable or 1.5 m cable with bridge box