Bently Nevada Velomitor Piezo-Velocity Sensor 330500

The Bently Nevada Velomitor Piezo-Velocity Sensor is designed for measuring absolute (relative to free space) vibrations of bearing housings, casings, or structural components. The 330500 model is a specialized piezoelectric accelerometer featuring integrated electronics in a solid-state design.

Specifications

Electrical Characteristics:

• Sensitivity:

  • 3.94 mV/mm/s (100 mV/in/s) ± 5%

• Frequency Response:

  • 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) ± 3.0 dB
  • 6.0 Hz to 2.5 kHz (360 cpm to 150 kcpm) ± 0.9 dB

• Temperature Sensitivity:

  • -14% to +7.5% typical over the operating temperature range

• Velocity Range:

  • 1270 mm/s (50 in/s) peak

• Transverse Sensitivity:

  • Less than 5% of sensitivity

• Amplitude Linearity:

  • ± 2% to 152 mm/s (6 in/s) peak

• Mounted Resonant Frequency:

  • Greater than 12 kHz

• Output Bias Voltage:

  • -12 ± 3.0 VDC, referenced to Pin A

• Dynamic Output Impedance:

  • Less than 2400 Ω

• Broadband Noise Floor (4.5 Hz to 5 kHz):

  • 0.004 mm/s (160 μin/s) rms (nominal)

• Grounding:

  • Case is isolated

• Maximum Cable Length:

  • 305 meters (1,000 feet) with no degradation of signal, using part number 02173006

Environmental Limits:

• Operating Temperature Range:

  • -55°C to 121°C (-67°F to 250°F)

• Shock Survivability:

  • 5,000 g peak, maximum

• Relative Humidity:

  • 100% non-submerged; case is hermetically sealed

Mechanical Characteristics:

• Base Strain Sensitivity:

  • 0.005 in/s/mstrain

• Magnetic Field Susceptibility:

  • < 51 min/s/gauss (50 gauss, 50-60 Hz)

• Weight:

  • 142 grams (5.0 oz) typical

• Dimensions:

  • Diameter: 25.3 mm (0.995 in)
  • Height: 63.2 mm (2.49 in)

• Case Material:

  • 316L stainless steel

• Connector:

  • 2-pin Mil-C-5015, hermetically-sealed, 316L stainless steel shell

• Mounting Torque:

  • 32-46 kg cm (24-40 in-lb) max

• Polarity:

  • When the sensor case motion is toward the connector, Pin A becomes positive with respect to Pin B.

Output Characteristics:

• Inrush Current:

  • 3 Amps supplied for 10ms without ESCP trip

• Output Voltage Drop:

  • 0.3 V DC maximum

• Steady-State Overcurrent Trip:

  • 5 Amps typical per point

• Output Leakage Current:

  • 0.1 mA maximum

• On Response Time:

  • 0.5 ms maximum

• Off Response Time:

  • 0.5 ms maximum

• Protection:

  • Short-circuit protection
  • Overcurrent protection
  • Overtemperature protection
  • All with auto recovery