Catalogues - vibration-transducers

Catalogue Vibration Transducers

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SP Low Frequency Seismic Accelerometers

Short Period accelerometer, SOVIg output, high dynamic range, low frequency performance 0.1 Hz - IKHz.

The SP series of Piezoelectric detection are robust, portable, field proven instruments suitable for operation in any attitude without modification. The SP4 unique inertial system of matched piezoelectric elements arranged in a reciprocal configuration generates high output sensitivity and minimum noise with a capability for complete transducer verification through an input calibration facility.

Outputs proportional to ground acceleration or ground velocity are available with sensitivities up to 50V/g. The sealed stainless steel casing makes the instrument particularly suited for field operation.

The SP4 is also available in a tri-axial configuration, consisting of three SP4s mounted in a 3-D boomerang arrangement. The tri-axial unit is also available mounted within an enclosure, providing calibration signal generation as well as alarm and switching functionality.

Application

• Slow Rotating Plant

• Construction & Foundation Monitoring

• Seismic Protection Systems

• Inaccessible Locations

• Remote Calibration Feature

Specifications

• Frequency Response: Acceleration 0.1 Hz to 1000Hz (3dB)

• Sensitivity: Acceleration 2 - 50V/g

• Dynamic Range: > 120dB

• Accuracy. ±\% at 25°C ±2% over operating temperature

• Linearity: 0.1 %

• Maximum Output: ± 10V pk-pk

• Cross-axis Sensitivity: < 1%

• Output Impedance: Less than I0O.

• Signal Transmission:Two Wire Current Loop

• Power supply unit: ± 12V to ± 15V. 6mA typically at ± 15V

• Calibration Sensitivity: 30V/g ±2% . Maximum Drive 3Vrms

• Shock Limits: 20g peak any direction

• Operating Temperature:-30°C to +70"C

• SP4 Mass:0.6Kg

• Tri-axial Arrangement Mass:5.0Kg

• Standard Connection Details: 8-way MINILATCH

• Standard Cable Type: 7/0.2mm screened, PVC Insulated

Yellow: CAL 15V. Red: Positive Supply, Black :0V

Blue: Negative Supply Green : Signal Hi White : Not Used

Ordering Information - Please see pages 16/17 for details of cable assemblies and mounting studs

Model No.

sp4

sp4t

Config - 6 (6-wire) (Triaxial)

Connection 6c (PTFE) 7g (PU)

Cable Length Specify in metres e.g. 05 (5m) max 25m

Sensitivity Specify in V/g 2V/g to SOV/g

Mounting

1 (M8 female)

2 (Triaxial)

e.g. SP4T-6-7G-03-202 :- SP4T Triaxlol model, 6-wlres per transducer, 3m unarmoured cable with waterproof gland connection at transducer, 20V/g, Triaxial mounting assembly.