Product Details
Configured for seismic vibration acquisition in rotating machinery, the Emerson EPRO PR9268/301-100 (PR9268/301-100) Electrodynamic Velocity Sensor provides direct electrical execution of velocity-based vibration monitoring.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PR9268/301-100 |
| Brand | Emerson EPRO |
| Operating Temp | -40 deg C to +125 deg C |
| Power Consumption | Passive (no external power) |
| Sensitivity | 28.5 mV/mm/s |
| Frequency Range | 4 to 1000 Hz |
| Measurement Range | +/- 1.5 mm |
Mechanical Monitoring and TSI Characteristics
The PR9268/301-100 operates on an electrodynamic principle, where an internal mass-spring system converts seismic mechanical motion into a proportional voltage output. Accurate rotor dynamics analysis requires the sensor to be mounted within its calibrated orientation—specifically, horizontal with a tolerance of +/- 10 deg for this variant. Operators must verify proper cabling to the monitoring system, as high-frequency coil induction is susceptible to electromagnetic interference. To maintain signal integrity, ensure the sensor body is mechanically coupled to the machine casing to minimize high-frequency attenuation, and perform periodic impedance checks to confirm the coil circuit continuity remains within specified limits.
Frequently Asked Questions
Q: Does the sensor require an external power supply to function?
A: No. The PR9268/301-100 is a passive electrodynamic device that generates its own output signal based on seismic movement. It does not require supply voltage, but must be connected to a compatible signal conditioner with the correct input impedance.
Q: What is the significance of the natural frequency rating?
A: The natural frequency of 4.5 Hz +/- 0.75 Hz defines the lower limit of the sensor's linear measurement range. Operation below this natural frequency will result in phase shift and non-linear amplitude response, making it unsuitable for low-frequency structural vibration analysis.
Field Installation Guidelines
- Secure the sensor to a flat, machined surface on the bearing housing or casing using a heavy-duty mounting stud to ensure rigid high-frequency transmission.
- Verify the mounting orientation is horizontal; exceeding the +/- 10 deg tolerance will introduce gravitational bias to the internal spring, altering the natural frequency and damping characteristics.
- Terminate signal leads at the signal conditioner input using shielded twisted-pair cabling; connect the shield to a common instrument ground to minimize 50/60 Hz line noise.
- Confirm the cable length does not introduce excessive capacitive loading, which can attenuate the high-frequency response (up to 1000 Hz).
- Conduct a physical tap test during commissioning to verify a positive output signal, confirming polarity and circuit integrity before the machinery is brought to full operating speed.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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