Nuclear Use Specifications (330530); Electrical - Bently Nevada Velomitor Sensor Operation Manual

Connector
Mounting Torque
Polarity
Note: Operation outside the specified limits will result in false readings or loss of

5.2 Nuclear Use Specifications (330530)

Parameters are specified at 77° F (25° C) unless otherwise indicated.

5.2.1 Electrical

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