Bently Nevada Velomitor Sensor - Nuclear Use Specifications (330530)

Section 5 - Specifications
31
Connector 2 pin Mil-C-5015,
hermetically sealed,
304 stainless steel shell
2 pin Mil-C-26482,
hermetically sealed,
304 stainless steel shell
Mounting Torque 4.5 N-m (40 in-lbs) 45.3 N-m (400 in-lbs)
Polarity Pin A goes positive with respect to Pin B when the
sensor case motion is toward the connector.
Note: Operation outside the specified limits will result in false readings or loss of
machine monitoring.
5.2 Nuclear Use Specifications (330530)
Parameters are specified at 77° F (25° C) unless otherwise indicated.
330530 Velomitor®
Sensor
(Pre-Radiation)
330530 Velomitor®
Sensor
(Post Radiation)
5.2.1 Electrical
Sensitivity
4 mV/mm/s (100 mV/in/s)
±5% at 100 Hz
4 mV/mm/s (100 mV/in/s)
±10% at 100 Hz
Frequency Response ±0.9 dB, 6.0 Hz to 2.5 kHz
±3.0 dB, 4.5 Hz to 5.0 kHz
±1.0 dB, 6.0 Hz to 2.5
kHz
±3.0 dB, 4.5 Hz to 5.0
kHz
Velocity Range 635 mm/s (25 in/s), peak 420 mm/s (16.5 in/s),
peak
Transverse Sensitivity < 5% of axial sensitivity
Amplitude Linearity
± 2% to 6.0 in/s, peak
Mounted Resonant
Frequency
12 kHz, minimum
Power Requirements DC Voltage: -22 to -30 Vdc
Bias Current: 2.5 to 6.0 mA
Output Bias Voltage,
referenced pin B to pin A
-12.0±1.0 Vdc, Room Temp
-12.0±3.45 Vdc, Over Temp
Referenced to pin A
-12.0±2.0 Vdc, Room
Temp
-12.0±3.7 Vdc. Over
Temp
Referenced to pin A
Dynamic Output Impedance
< 2400 Ω
Broadband Noise Floor
< 0.008 mm/s (320 µin/s)
Grounding Case Isolated
Maximum Cable Length 305 m (1000 ft) with no signal degradation
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