The 3500/25 125792-01 Enhanced Keyphasor Module produces important speed and timing reference signals for a rotation-based machinery monitoring system. The advanced Keyphasor module is an improved version of the previous Keyphasor unit, which now has better signal processing capabilities, improved system compatibility, and higher reliability. The Keyphasor Module receives an input signal provided by an eddy current probe or a magneto-electric sensor and converts it into a standard Keyphasor pulse signal. The application area of the Keyphasor Module is vast and includes power, petrochemical, chemical, metallurgical, paper, and natural gas transmission, and other practices involving large machinery manufacturing.
In the rotating machinery monitoring system, the Keyphasor signal is regarded as the "time reference signal", which serves as the foundation for vibration analysis, phase calculation, and speed monitoring. Without the Keyphasor signal, many advanced analysis functions (such as 1X vibration analysis, order analysis, trajectory graphs, etc.) would not be achievable.
| Basic parameters | Description | Enhanced Keyphasor Module |
| Model | 3500/25 | |
| Part Number | 125792-01 | |
| Number of channels | 2-channel (half-height module) | |
| Input parameters | Input Type | Electromagnetic eddy current probe / Magneto-electric sensor |
| Input range | Non-isolation: +0.8V to -21V | |
| Isolation: +5V to -11V | ||
| Output parameters | Output signal | Buffered Keyphasor signal |
| Output method | Front panel coaxial interface | |
| Back-end Euro connector | ||
| Origin | USA | |
| Dimension | 26*14*5cm | |
| Weight | 0.34kg | |
| Keyphasor Signal Generation Mechanism |
| The core function of the 3500/25 125792-01 module lies in generating the Keyphasor signal. Receive analog signals from sensors (electro-vortex probes or magneto-electric sensors) Filter, shape, and amplify the signals Convert them into standard digital pulse signals (Keyphasor) Output them to the 3500 monitoring module or the external diagnostic system |
| Speed measurement and phase analysis |
| One of the important applications of the Keyphasor module is speed measurement. By using the pulse frequency, the rotational speed of rotating equipment (RPM or CPM) can be directly calculated. At the same time, this module also provides a phase reference, enabling the system to perform: 1. Analysis of vibration amplitude and phase Synchronous analysis of multi-channel vibration signals Axis trajectory analysis (Orbit Analysis) |
| Dual-channel design |
| The 3500/25 125792-01 module adopts a dual-channel structure design and has the following advantages: Simultaneously connect two sensor signals Support primary/backup redundant configuration |
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