Description

The Bently Nevada 23732-01, also cataloged as the 23732 Acceleration Transducer, operates as a dedicated hardware component for critical machinery casing acceleration measurements within 3300 monitor platforms. This 3-wire piezoelectric-based component translates physical casing vibration acceleration into a proportional low-impedance electrical voltage signal. However, it requires an external 23733-03 interface module to step up the raw output to standard industry monitoring levels. The hardware design features a ruggedized 316L stainless steel enclosure that directly mounts onto high-speed machinery housings such as gearboxes and pumps.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Calibration

Because the 23732-01 system uses an external 23733-03 interface module, engineers must calibrate the interface amplification loop to scale the raw 25 mV/g sensor output up to a nominal 100 mV/g monitor input target. During initial setup, technicians verify cross-talk suppression by ensuring the high-impedance low-noise coaxial interconnect cable remains isolated from adjacent high-voltage power conduits. This step prevents induced electromagnetic interference from distorting high-frequency gear mesh frequencies.

Furthermore, adjusting the baseline system common configuration eliminates ground loop noise because the built-in internal isolator mechanically separates the circuit common from the outer 316L stainless steel transducer case. Consequently, this step preserves the physical integrity of the measurement path during high-transient rotor dynamics tracking, allowing the 3300 rack to capture exact synchronous vibration vectors without signal saturation.

Frequently Asked Questions

Q: Can technicians connect the 23732-01 accelerometer directly to a standard 3300 monitor rack?

A: No, because the 23732-01 sensor possesses a raw high-impedance output rated at 25 mV/g, it requires the intermediate 23733-03 interface module. Therefore, technicians must route the sensor signal through the interface module first to amplify the signal to the standard 100 mV/g level required by the monitor backplane.

Q: What type of cabling does the 23732-01 require between the sensor body and the interface module?

A: The system requires a dedicated, special low-noise coaxial interconnect cable. Because the unamplified sensor output is highly sensitive to triboelectric noise, standard industrial twisted-pair shielding will degrade accuracy across the 10 Hz to 20 kHz frequency range.

Field Installation Guidelines

• Mechanical Thread Engagement: Prepare the mounting surface to a minimum diameter of 17.5 mm. Then, engage the 1/4-28 UNF mounting stud with at least 5 full thread turns of engagement, using a 19.0 mm hex flats wrench to torque the sensor securely against the flat machined surface.
• Cable Strain Relief: Secure the low-noise coaxial cable to the machine casing using rigid physical clamps within 150 mm of the sensor body. This prevents physical cable whipping from generating false high-frequency acceleration signals.
• Shielding Ground Routine: Terminate the outer cable shield at the interface module common terminal only. Simultaneously, maintain the internal electrical isolation from the machine case by keeping the built-in isolation layer intact during mounting.
• Environmental Sealing: Wrap all external coaxial connector joints using self-fusing silicone tape or terminal boots. This protection prevents oil, moisture, or chemical solvents from breaking down the high-impedance connector interfaces.