Isolated Dynamic Signal Test and Analysis System - DE-918U
The DE-918U Isolated Dynamic Signal Test and Analysis System delivers exceptional measurement accuracy in high-interference environments through advanced channelto-channel isolation technology. Featuring individual shielding for each channel and a robust 19-inch rackmount design, the system supports unlimited channel expansion via Gigabit Ethernet while maintaining perfect signal synchronization across all measurement points
Suitable for accurate measurement in harsh electromagnetic environment with strong interference
Suitable for multi-point grounding of sensor and acquisition system
Individual 18-bit SAR A/D converter and dedicated DSP real-time signal processing system per channel with continuous sample rates of up to 1MHz.
Anti-CMV up to 500V and CMR over 120dB
DMA for real-time, high speed, stable data transmission.
Built-in bridge completion and excitation
Built-in 24V/4mA biasing circuit, used to acquire the output signal of IEPE acceleration sensors and microphones.
Built-in low-pass filter and anti-aliasing filter
Suport EID and TEDS
Support the self-check of strain channel and quickly get current state.
| Name | Detail |
|---|---|
| Number of input channels | 1 channel/card, 8/16 card slots |
| Input Coupling | GND, Dif-DC, Sin-DC, AC, IEPE |
| Input Impedance | 10MΩ/100pF |
| Input Voltage Range | ±0.005V, ±0.01V, ±0.02V, ±0.05V, ±0.1V, ±0.2V, ±0.5V, ±1.0V, ±2.0V, ±5.0V, ±10.0V, ±20.0V |
| Indication Error | 0.05% of F.S. |
| Stability | 0.05%/h |
| Nonlinearity | 0.05% of F.S. |
| Noise | ≦3μVRMS |
| Zero Drift | ≦±3μV/24h |
| CMV | ≧500V (DC/AC peak value) |
| 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 |
| Current | Max. 500mA |
| LPF | |
| Cut-off Frequency (-3dB±1dB) | 10Hz, 30Hz, 100Hz, 300Hz, 1kHz, 3kHz, 10kHz |
| Flatness | <0.1dB Within 2/3 of cutoff frequency |
| Stop-band Attenuation | -24dB/Oct. |
| Communication | Gigabit Ethernet |
| A/D Converter | 18-bit SAR |
| Freq. Response | DC~100kHz (+0.5dB~-3dB) |
| Continuous Sampling | Up to 1MHz/channel |
| Sample rates (6 channels) | Up to 250kHz/channel |
| Sample rates (All channels) | Analog filter and real-time digital filter |
| Anti-aliasing filter | |
| Filtering Mode | Analog filter and real-time digital filter |
| Cut-off Frequency | 1/2.56 of sampling rate |
| Stop-band Attenuation | -120dB/Oct. (Fs < 100kHz) |
| Flatness | <0.1dB Within analysis frequency range |
| Power supply | 100~240VAC/10~30VDC |
| Dimensions | 237×88×328mm (8 channels chassis), 482×88×328mm (16 channels chassis) |
| Weight | Approx. 6kg (8 channels chassis) |
| 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 Resistance |
Frequency cycle range: 5~55~5Hz Drive amplitude (peak): 0.19 mm Sweep frequency: ≦1 Oct./min Duration of resonant: 10 min 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-918U DAQ Card
1 input channel
Support GND, Dif-DC, Sin-DC, AC, IEPE, three-wire 1/4 bridge, 1/2 bridge and full bridge Input
Full-scale voltage Value from ±0.005V to ±10.0V
Full-scale strain value from ±1000με to ±100000με
Individual 18-bit SAR A/D converter per channel with transient sample rates of up to 1MHz
System uncertainty within 0.5% of F.S
Frequency response range from DC to 100kHz
CMRR over 120 dB.
Semi-19" 2U Chassis
CPU based on on-chip system (SOC)
8 Card Slots
Including control card, Gigabit Ethernet communication interface
100 ~ 240VAC / 12VDC power supply
19" 2U 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: 10^3pC or 10^5pC, software selectable
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)
Dimensions: 50mm(W)×20mm(H)×80mm(L)
DT5855-8 Charge Conditioner (Optional)
1 input channel
Max. input charge: 10^3pC or 10^5pC, software selectable
Max. bandwidth: 0.3Hz ~ 300kHz (+0.5dB ~ -3dB)
Quadratic analog integral
Dimensions: 50mm(W)×35mm(H)×110mm(L)
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
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