Description

Configured for specific non-contact displacement and vibration measurements in machinery protection networks, the Bently Nevada 46920-01 (46920 Velomitor Super Mag 100 Magnetic Base) operates as a dedicated hardware component for portable vibration sensor coupling within asset monitoring platforms. This specialized, high-strength permanent magnetic accessory attaches directly to flat or curved ferrous surfaces, establishing a rigid physical coupling for 330500 Velomitor and other piezo-velocity sensors. Consequently, the component routes mechanical casing velocity details directly to external diagnostic instruments without requiring field technicians to execute permanent stud drilling or tapping procedures.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Calibration

Because the 46920-01 magnetic base serves as the direct mechanical interface between the vibrating machine casing and the internal piezo-velocity element, technicians must verify the physical coupling integrity during sensor scaling routines. While a permanent threaded stud provides an ideal flat-frequency transmission line, temporary magnetic bases shift the high-frequency response limits. Therefore, during initial calibration passes, engineers adjust the signal filtering limits within the 3500 monitor rack to compensate for this physical interface variation.

Furthermore, precise mounting placement prevents cross-talk suppression failures when moving portable velocity transducers across multiple designated measurement paths on a single bearing housing. Clean, flat physical alignment ensures that the magnetic base eliminates rocking anomalies, which minimizes induced high-frequency signal noise. As a result, maintaining solid magnetic adhesion allows the transducer to transfer exact synchronous casing velocities and transient rotor dynamics signals to the machinery protection system.

Frequently Asked Questions

Q: Does the 46920-01 magnetic base require an electrical excitation voltage from the monitor rack?

A: No, because the hardware utilizes a passive, permanent high-pull magnetic array, it requires no external power supply. Therefore, it maintains its rated physical holding force continuously across the entire specified temperature range.

Q: Can field personnel install the 46920-01 base on non-ferrous machinery surfaces?

A: No, because non-ferrous metals like aluminum, bronze, and austenitic stainless steels lack magnetic properties, the permanent magnetic core cannot establish physical adhesion. Consequently, technicians must exclusively use this accessory on carbon steel, cast iron, or other raw ferrous structural components.

Field Installation Guidelines

• Surface Preparation: Wipe clean the designated physical measurement location to completely remove grease, heavy oils, loose paint scaling, and rust debris. A raw, smooth surface optimizes the physical contact area and ensures maximum magnetic holding stability.
• Mechanical Thread Engagement: Thread the 330500 Velomitor or matching velocity transducer directly into the top 1/4-28 UNF internal mounting hole. Ensure a minimum of 5 full thread turns of engagement, then hand-tighten the sensor body to prevent internal thread deformation.
• Attachment Technique: Tilt the 46920-01 base slightly and place one edge onto the ferrous metal housing first. Then, gently lower the base flat against the target machine casing. This step prevents severe physical shock from fracturing the internal permanent magnets or damaging the sensitive crystal elements inside the velocity sensor.
• Cable Safety Routing: Secure the attached sensor cable immediately to the machine structure using temporary clips or ties near the magnetic assembly. This configuration prevents physical cable weight and whipping forces from tipping the magnetic base away from its target measurement coordinates.