The Bently Nevada AS3100S2-Z2, also cataloged as the AS3100 Side Exit Sensor, operates as a dedicated hardware component for seismic vibration monitoring within industrial machinery and power generation platforms.

Suffix Breakdown & Model Matrix

The AS3100S2-Z2 follows the standard Bently Nevada seismic transducer nomenclature for industrial housing and connectivity:

• AS3100: Series identifier for seismic acceleration sensors.

• S2: Sensitivity and frequency response configuration.

• Z2: Connector exit and mounting style (Side Exit).

Hardware Specifications

Seismic Monitoring Characteristics

The AS3100S2-Z2 transducer utilizes piezoelectric sensing technology to translate casing acceleration into a proportional voltage signal. This sensor is designed for mounting directly to machine casings, bearing housings, or structural components. Accurate monitoring requires proper coupling to the machine surface to ensure the high-frequency vibration signatures of the internal components (such as gear mesh or bearing defect frequencies) are accurately captured. The sensor requires a constant current power supply (typically from an IEPE-compatible vibration monitor or data collector) to bias the internal amplifier.

Ordering info

• One (1) AS3100S2-Z2 Side Exit Sensor.

• Mounting stud (standard thread).

• Calibration certificate.

• Note: This sensor requires a low-noise coaxial cable for connection to the monitor input; ensure the cable is compatible with the sensor's connector type.

Field Installation Guidelines

• Surface Preparation: The machine mounting surface must be flat and free of paint or debris; apply a thin layer of synthetic grease or epoxy to ensure high-frequency signal transmission.

• Mounting: Thread the sensor onto the mounting stud; ensure the base is flush with the machine surface. Do not over-torque, as this can stress the piezoelectric element.

• Cabling: Use high-quality, shielded twisted-pair or coaxial cable; avoid sharp bends. In high-vibration areas, provide strain relief for the cable near the sensor to prevent connector fatigue.

• Grounding: The sensor housing is case-grounded. Ensure the machine surface provides a stable earth potential to minimize ground loops and 50/60 Hz line noise.

• Orientation: The "Side Exit" configuration is designed for installations where vertical clearance is limited, allowing for low-profile cable routing.

Frequently Asked Questions

• What is an IEPE sensor?

  IEPE stands for Integrated Electronics Piezo-Electric. These sensors contain internal amplification circuitry and require a constant current power supply provided by the monitoring system.

• Why is a side-exit cable design used?

  Side-exit sensors are used in tight installations where space above the sensor is limited, allowing the cable to be routed parallel to the mounting surface.

• Does this sensor require an external Proximitor?

  No. Unlike eddy-current proximity probes, the AS3100 is an acceleration sensor and does not use a Proximitor. It interfaces directly with IEPE-compatible vibration inputs.

• Can this sensor be mounted using a magnet?

  While magnetic bases can be used for temporary diagnostic measurements, permanent monitoring installations require a threaded stud mount for reliable high-frequency response.

• What is the frequency response range?

  The AS3100 series is typically optimized for broad-spectrum industrial vibration; consult the specific calibration data sheet for your unit's exact frequency response limits.

• Is the sensor sensitive to orientation?

  The sensor measures acceleration along its primary axis (the axis of the mounting stud). Ensure it is oriented in the direction of the vibration you intend to monitor.

• Can the cable length affect the signal?

  Yes. Long cable runs can introduce capacitive loading, which may attenuate high-frequency signals. Use high-quality, low-capacitance cable for runs exceeding 30 meters.

• How is a faulty sensor identified?

  Common signs of failure include a DC bias voltage outside the nominal range (typically 8 VDC to 12 VDC) or a lack of signal output under machine operation.