SV 38
SV 38 Whole-Body Vibration Accelerometer
Description
The SV 38 is a MEMS based triaxial accelerometer designed for whole-body seat vibration measurements with the SVAN 958A four-channel analyser.
The seat-pad meets ISO 8041:2005 and ISO 2631-1 requirements so it can be used for seat and seat-back
vibration measurements.
For the periodic verification, the accelerometer can be easily removed from the seat pad and installed on a shaker with a dedicated SA 38 adapter (optional).
Technical Specifications
Performance :
| Number of Axes | 3 |
| Sensitivity (± 5 %) | 100 mV/(ms-2) at 15.915 Hz |
| Measurement Range | 0.01 ms-2 RMS ÷ 50 ms-2 PEAK |
| Frequency Response (by design guideline, ± 3 dB) | 0.1 Hz ÷ 100 Hz |
| Resonant Frequency | 5 kHz (MEMS transducer) |
| Electrical Noise | < 316 μV RMS, HP1 weighting |
Electrical :
| Supply Current (IEPE) | 1 mA ÷ 10 mA (2.5 mA typ.) per channel |
| Supply Voltage (IEPE) | 22 V ÷ 30 V (28 V typ.) |
| Bias Voltage (IEPE) | 15.3 V ± 0.5 V |
| Output Impedance | 51 Ohms |
| Charge / Discharge Time Constant (start-up time) | 30 sec. typ. |
| TEDS Memory | Installed (Channel 1) |
Environmental Conditions :
| Maximum Vibration | 100 000 ms-2 shock survival for MEMS sensor |
| Temperature Coefficient | <+0.012 dB/°C |
| Temperature | from -10 °C to +50 °C |
| Humidity | up to 90 % RH, non-condensed |
Physical :
| Sensing Element | MEMS |
| Cable | integrated 1.4 meters long |
| Connector | LEMO 4-pin plug (SVAN 958A compatible) |
| Dimensions | 236 mm diameter; thickness from 3.6 mm to 12 mm |
| Weight | 550 grams (including cable and rubber cushion) |
Accessories :
| SA 38 (optional) | Calibration adapter |
| SC 39S (optional) | Cable LEMO 4-pin socket to three BNC plugs, 0.7 meter |
