GE / Commtest vb7 Vibration Analyzer

The GE/Commtest vb7 is a portable dual-channel vibration analyzer designed for condition monitoring, machine diagnostics, and on-site balancing of rotating machinery. It enables predictive maintenance through simultaneous data collection, real-time analysis, and trending across two channels. The vb7 serves analysts at all skill levels and is certified for Class 1, Division 2 hazardous areas. Its ergonomic design—contoured grip, innovative neck-strap attachment, and ambidextrous keypad with raised tactile keys—supports extended fieldwork without fatigue.

## Technical Specifications

**Measurement Capabilities:**
• Dual-channel simultaneous recordings with 24-bit analog-to-digital conversion
• FFT resolution: 6,400 lines; 12,800 lines in select configurations
• Frequency range (Fmax): Up to 40 kHz; 80 kHz in some configurations
• Acceleration range: 1000 g
• Velocity range: 25,000 mm/s
• Displacement range: 2,500 mm
• Dynamic range: ≥ 95 dB
• AC coupled range: 16 V peak-peak (±8 V sensor output swing, ±80 g)
• DC coupled ranges: 0–20 V, −10 to +10 V, −20 to 0 V
• Long time waveform Fmax: 25 Hz to 40 kHz
• Demodulation: 23 bandwidth options (125 Hz–1,250 Hz through 16 kHz–20 kHz)
• Sensor support: Acceleration, displacement, velocity, and current sensors

**Analysis & Balancing:**
• Two-plane rotor balancing
• 6Pack™ measurement mode: Up to 12 simultaneous measurements across two channels
• Time synchronous averaging, coastdown, runup analysis, bump test, cross-channel phase analysis, orbit plot, long time waveform
• Average value mode for DC-coupled sensors
• Spectrum and waveform recording

**Data Management:**
• 1 GB onboard memory
• Software compatibility: Ascent® Level 2 and Bently Nevada System 1

## Key Features

• Class 1, Division 2 hazardous area certification (USA)
• True left- and right-handed keypad operation
• Balanced neck-strap carrying system
• On-route and off-route data collection with machine-side analysis and diagnosis capability

## Typical Applications

• Rotating machinery condition monitoring
• Bearing fault detection via demodulation
• Dynamic balancing correction
• Predictive maintenance trending

## Compatibility & Integration

Integrates with Ascent® Level 2 software and Bently Nevada’s System 1 software for extended analysis and data management.