Case Studies
1. Measurement Details
- Measurement Date
May 24, 2016 - Measurement Devices
1. LAN-XI Data Acquisition Hardware
– Brüel & Kjæ r 3050-A-040 (Serial Number: 3050-111438)
2. Data Analysis Software
– Brüel & Kjæ r PULSE LAB SHOP 14
3. Sensors
– PCB Accelerometer
– Model: 393B05 (Serial Number: 48995, 40626) - Measurement Location
1st Floor - Measurement Setup
Bandwidth: 0 – 100 Hz
Lines: 400
Window: Hanning
Averaging: Fast Fourier Transform Spectrum Averaging
Amplitude Units: m/s2
Spectral Unit: RMS
2. Equipment Information
- Manufacturer
ZEISS - Model
EVO 18 SEM - Floor Vibration Specification
The manufacturer specifies that allowable vibration values are less than 6μm/s RMS up to 30 Hz and less than 12 μm/s RMS above 30 Hz. Unless otherwise stated, requirements should be assumed to be in three orthogonal axes and in third octaves between 1Hz and 80Hz.
3. Vibration Isolation System Information
Model: DVIA-MB1000
| Platform Dimensions | 1140 x 910 x 224 mm | |
| Load Capacity | 500 - 1700 kg | |
| Actuator | Electromagnetic Actuator | |
| Maximum Actuator Force | Vertical: 40N, Horizontal: 20 N | |
| Degrees of Freedom | 6 degrees | |
| Active Isolation Range | 0.5 - 100 Hz | |
| Vibration Isolation at 2 Hz | ≥90% | |
| Vibration Isolation at 10 Hz | ≥99% | |
| Input Voltage (V) | AC100 - 240V / 50 - 60 Hz / 1A | |
| Power Consumption (W) | Maximum 110W, <50 W in normal operation | |
| Operating Range | Temperature (°C) | 5 - 50 °C |
| Humidity (%) | 20 - 90% | |
| Required Air Pressure | ≥ 0.5 MPa (5 bar) | |
4. Installation Photos
5. Summary
| Floor Vibration Specification | ||||||
|---|---|---|---|---|---|---|
| Frequency Range | 1 - 30 Hz | Above 30 Hz | ||||
| Allowable Vibration Values | 6 μm/s RMS | 12 μm/s RMS | ||||
| Measurement Direction | Z axis (Vertical) | X axis (Left to Right) | Y axis (Front to Back) | Z axis (Vertical) | X axis (Left to Right) | Y axis (Front to Back) |
| Floor | Fail | Fail | Fail | Pass | Pass | Pass |
| On Active Vibration Isolation System | Pass | Pass | Pass | Pass | Pass | Pass |
6. Results
Z-axis (Vertical)
X-axis (Left to Right)
Y-axis (Front to Back)
7. Results – Active Off vs Active On
Active Vibration Isolation Off
110K
Active Vibration Isolation On
110K