GE / Bently Nevada TK21 Oscilloscope Interface

The GE / Bently Nevada TK21 Oscilloscope Interface bridges Bently Nevada machinery monitoring systems and standard oscilloscopes to enable visualization and analysis of vibration signals. This specialized module accepts XY and Keyphasor transducer inputs and outputs conditioned signals via BNC connectors to dual-channel oscilloscopes equipped with Z-axis (external blanking) capability. The TK21 supports X versus Y orbit displays for real-time vibration, position, and phase monitoring – critical for diagnostics and predictive maintenance of rotating machinery. ## Technical Specifications **Signal Interfaces**
• XY Transducer Inputs and Keyphasor Transducer Inputs
• Maximum input signal: ±24 Vdc
• Transducer output bias adjustment: +12 Vdc to -12 Vdc (10 K ohm load)
• Transducer DC gain: 0.985 to 0.995 (10 K ohm load)
• Signal offset: 5 mV maximum
• Keyphasor gain adjustment range: +3 to -3 (factory setting: -0.12 for Tektronix® compatibility)
• Keyphasor DC offset adjustment: +12 Vdc to -12 Vdc (factory setting: +2.5 Vdc)
• High-pass filter corner frequency: 100 Hz to 110 Hz **Power Requirements**
• 110 Vac option: 95–125 Vac, 50/60 Hz, single phase; 50 mA maximum; 100 mA 250 Vac time-delay fuse
• 220 Vac option: 190–275 Vac, 50/60 Hz, single phase; 25 mA maximum; 60 mA 250 Vac time-delay fuse **Oscilloscope Requirements**
• Dual-channel oscilloscope with Z-axis input (external blanking)
• X versus Y (orbit display) capability
• Recommended for analog oscilloscopes ## Key Features • Horizontal and vertical offset adjustment controls
• Output bias indicator LEDs
• Adjustable Keyphasor gain and offset for multi-oscilloscope compatibility
• Factory-optimized settings for Tektronix® oscilloscopes
• BNC connectors for all signal connections ## Typical Applications • Rotating machinery vibration analysis and trending
• Real-time orbit display monitoring
• Keyphasor-based phase reference diagnostics
• Predictive maintenance and failure prevention ## Compatibility & Integration The TK21 interfaces with XY and Keyphasor proximity transducers from Bently Nevada systems. Signal conditioning and output levels are factory-preset for compatibility with most Tektronix® oscilloscopes, with user-adjustable gain and offset for integration with alternative platforms.