Vibration measuring systems
Low Frequency Vibration Signal Conditioner (VM-5123/6)
- A compact signal amplifier to make optimal signal processing
- It is used for vibration acceleration measurement, waveform observation and various analysis. In addition, vibration data can be output to instruments like recorders.
Features
- ■ Compact and light weight (920 g)
- ■ 6 channels (vibration signal inputs) + 2 channels (voltage signal inputs)
- ■ Connectable to 3-axis pickup
- ■ Sensitivity range change over & low-pass filter
- ■ High signal / noise ratio
System Composition
Makes optimal signal processing being connected with the servo type accelerometer. It is used for vibration acceleration measurement with AC voltage meter, waveform observation with oscilloscope and various analysis with FFT analyzer.
Specifications
| Item | Specification | Notes |
|---|---|---|
| Measurement channel | Vibration input x 6 (CH1–CH6) Voltage input x 2 (CH7–CH8) |
Voltage inputs from servo type accelerometer (single axis type, 3-axis type) Capable of input voltage signal such as noise level meter, pressure meter, thermometer and hygrometer |
| Input combination | CH1–CH6 AC/DC CH7–CH8 DC |
CH1–CH6 AC : 0.1 Hz–DC : Zero adjustment / Gravity acceleration cancellation CH7–CH8 DC only |
| Frequency response | CH1–CH6
0.1 Hz / DC to 12 Hz (±0.5 dB) CH7–CH8 DC to 12 kHz (±0.5 dB) |
CH1–CH6 Variable low-pass filter to be set as (fc=20 Hz, 50 Hz, 100 Hz) CH7–CH8 Low-pass filter to be set on or off (fc=20 kHz) |
| Measurement range | CH1–CH6
0.01 m/s2, 0.1 m/s2, 1 m/s2, 10 m/s2 CH7–CH8 ±5 V full scale voltage signal |
― |
| Output signal | ±5 V full scale voltage waveform signal | 1 signal route (for recorder) |
| Linearity | ±0.5 % full scale | ― |
| Inter range error | ±2 % | ― |
| S/N | ≧60 dB to 100 dB | ≧ 100 dB (measurement range : 10 m/s2) |
| ≧ 96 dB (measurement range : 1 m/s2） | ||
| ≧ 80 dB (measurement range : 0.1 m/s2） | ||
| ≧ 60 dB (measurement range : 0.01 m/s2） | ||
| Calibration signal output |
12 Hz full scale | Calibrated for 0.01 m/s2 |
| External control | Measurement range low-pass filter | Controlled by TTL level signal |
| Power supply | DC9 to 12 V 5A | ― |
| Power consumption | 4W | Increases by (0.8 x axis number) W connected with pickups |
| Operational temperature range |
0 to + 50 ﾟC | ― |
| Size / Mass | 240 (W) x150 (D) x35 (H) mm / Approx.920g | ― |
Option
| Item | Content | Notes |
|---|---|---|
| Output cable | Mini plug-BNC 1.5 m | ― |
| Battery pack | Continuous operation : ≧ 3hrs. for 6ch. | Battery for lap top PC |
Servo type accelerometer (VP-5123HHV)
| Item | Specification |
|---|---|
| Sensitivity direction | HHV 3 directions |
| Maximum measurable acceleration | 29.4 m/s2 |
| Sensitivity | 0.204V m/s2 (±5 % ≦) |
| Frequency range | DC–100 Hz |
| Natural frequency | ＞ 400 Hz |
| Linearity | ±0.1 % full scale |
| Resolution | ≧ 4.9 x 10-5 m/s2 |
| Power supply voltage | DC±11 to 16 V |
| Operational temperature range | -25 to +70 ﾟC |
| Structure | Dust-proof, Drop-proof (IP65) |
| Cable connection | Waterproof connector |
| Material | Aluminum die casting |
| Mass | 3 |
| Self-testing | Non |