Bently Nevada 176449-09

Product Features

Bently Nevada 176449-09 has a 4-channel design, with channels programmed in pairs to support 2 monitoring functions at the same time (e.g., channels 1-2 for Impulse Acceleration and channels 3-4 for Reciprocating Velocity).

Bently Nevada 176449-09 supports 4 core functions such as Impulse Acceleration, Acceleration 2, Recip Velocity, Low Frequency Recip Velocity.

Bently Nevada 176449-09 filters (high-pass, low-pass, integral, etc.), amplifies, and extracts features from the input signal, and generates static values (e.g., peak, RMS, 1X/2X amplitude and phase).

Bently Nevada 176449-09 has a built-in smoothing filter (8 turns of averaging) to improve data stability, and supports crankshaft angle bands analysis (6 user-adjustable angle ranges) to accurately capture phase-specific vibration features.

Bently Nevada 176449-09 can be configured with “alert” thresholds for each static value, and “danger” thresholds for any 2 static values, driving external alarms when triggered.

The front panel is equipped with buffered outputs (1 coaxial connector per channel) to support signal multiplexing, and a 4-20mA logger output (proportional to full scale) for easy data archiving.

The front panel LED indicator shows the real-time operation status (e.g. channel alarm, module normal, etc.). Output Bias Voltage for system self-test and sensor fault diagnosis.

Product Functions

Signal Acquisition:

Bently Nevada 176449-09 can receive vibration signals from seismic sensors (e.g. accelerometers, velomitor speed sensors), which reflect the mechanical vibration status of the crankcase or cross head of reciprocating compressors.

Signal Conditioning:

Bently Nevada 176449-09 removes noise and extracts effective frequency components through built-in filters (high-pass, low-pass, integral filtering, etc.); amplifies and rectifies the signals, and calculates static parameters such as peak value and RMS value.

Alarm judgment:

Bently Nevada 176449-09 compares the calculated static values with the preset “alert” and “danger” thresholds, and triggers the corresponding alarm (indicated by LED or external output) if the thresholds are exceeded.

Data output:

Bently Nevada 176449-09 transmits the processed signals (e.g. 4-20 mA logger signals, buffered output signals) to the host computer or recording device for real-time monitoring and historical analysis.

Product Parameters

The following is Bently Nevada 176449-09 Recip Impulse Velocity Monitor detail.

Signal Input: supports 1-4 proximity probe signals or seismic sensor signals

Input Impedance: acceleration signals > 10 kΩ, Velocity signals > 1 MΩ

Pulse Acceleration/Acceleration 2: 0.51-11.72 mV/(m/s²) (5-115 mV/g)

Reciprocating Velocity/Low-Frequency Reciprocating Velocity: 3.54-22.64 mV/(mm/s) (90-575 mV/(in/s))

Power Consumption: 7.7 watts (nominal)

Logger Output: 4-20 mA (proportional to full scale), load resistance ≤ 600 Ω, accuracy ±0.05 mA (ambient)

Buffered Output: impedance 550 Ω (typical), short-circuit protected

Maximum Output Current: 40 mA (running), 15 mA at startup (no foldback)

Pulse Acceleration: High Pass 3-3000 Hz (Peak), 10-3000 Hz (RMS), Low Pass 30-30000 Hz (Peak), 40-30,000 Hz (RMS)

Reciprocation Speed: High Pass 1-400 Hz (Peak), 10-400 Hz (RMS); Low Pass 40-5500 Hz (Peak), 60-5500 Hz (RMS); Filters Hz (RMS);

Filter: 4-pole highpass/lowpass (80 dB/decade), 1-pole bias filter (-3 dB@0.01 Hz)

Threshold Range: 0-100% full scale (limited by sensor range)

Accuracy: ±0.13% of target

Delay:  1-60 seconds for warning (1 second step), 0.1 seconds for hazard (nominal) or 1-60 seconds

Operating temperature: -30°C to +65°C with non-barrier I/O module, 0°C to +65°C with internal barrier I/O module,

Storage temperature: -40°C to +85°C,

Humidity: 95% non-condensing