The Bently Nevada 200350-00-00-00, also cataloged as the 200350 Accelerometer, operates as a dedicated hardware component for high-frequency casing vibration measurement within Trend Monitoring Systems. This case-mounted seismic transducer contains a piezoelectric sensing element that generates an internal electrical charge proportional to dynamic acceleration along its sensitive axis, translating mechanical excitation into a continuous differential voltage signal.

Variant Coding Options

• 200350 : Base Model for general-purpose case-mounted seismic accelerometer

• -00 : Mounting Stud Option: 1/4-28 UNF threaded stainless steel stud with brass tip, 0.5 inch length

• -00 : Measurement Tolerance Option: 100 mV/g +/- 20 percent sensitivity calibration

• -00 : Agency Approval Option: Standard design configuration with no hazardous location certifications

Physical and Electrical Specifications

Rotor Dynamics and Cross-Talk Suppression

The internal piezoelectric shear geometry of the 200350-00-00-00 is specifically isolated to restrict base strain sensitivity and eliminate cross-talk suppression failures caused by structural multi-axis movement. By providing a passive high-impedance charge conversion loop before differential voltage amplification, the transducer maintains signal integrity across rotating machinery casings without capturing low-frequency rotor dynamics harmonics or eddy-current probe scaling variances. This design minimizes high-frequency distortion and acceleration saturation on high-speed industrial motor frames and centrifugal pump blocks.

Packaging Assembly Kit

• 1 x Bently Nevada 200350-00-00-00 Accelerometer unit

• 1 x 1/4-28 UNF Stainless Steel Mounting Stud (with Brass Tip)

• 1 x Silicone Connector Dust Shield Cap

Structural Installation Protocol

• Surface Preparation Matrix

• The casing location must be spot-faced flat and smooth within a surface tolerance of 0.8 micrometers to avoid phase shift errors.

• Threaded Base Engagement

• Ensure the 1/4-28 threaded mounting hole matches a minimum of 5 full threads of engagement before applying torque.

• Coupling Torque Constraints

• Tighten the sensor base to a maximum mechanical limit of 4.5 N m (40 in-lb); do not exceed this threshold to prevent crystal damage.

• Excitation Input Warning

• Apply only constant current positive excitation voltage between 18 and 28 VDC; negative voltage injection will destroy the internal electronics.

Engineering Support FAQs

• Can this accelerometer be hot-swapped while the field terminal monitor is active?

  Yes, field signal connections using the MIL-C-5015 plug can be safely disconnected and reconnected while the main instrumentation power loop remains fully energized.

• What is the specific current loop limit requirement for the internal amplifier circuit?

  The constant current supply sourcing this device must be maintained within a strict 2 mA minimum and 20 mA maximum operational threshold window.

• How should the interconnecting signal shield be terminated to prevent grounding loops?

  The outer shield must be isolated and left floating at the accelerometer housing end, while terminating to system ground inside the monitoring rack panel.

• Does this unit require an external charge converter module?

  No, the sensor features an integrated internal charge amplifier that translates high-impedance piezoelectric charge directly into a low-impedance voltage output.

• What occurs if the housing seal is exposed to continuous chemical washing?

  The hermetically sealed stainless steel enclosure prevents internal contamination, though the external MIL-C-5015 interface requires a splash-proof boot assembly.

• Are there any configuration jumpers required to adjust the sensitivity calibration?

  No, the 100 mV/g sensitivity rating is fixed permanently during factory element polarization and cannot be field-adjusted or re-ranged.

• What failure state occurs if the mounting surface is unlevel?

  Misalignment increases transverse axis sensitivity, allowing perpendicular cross-talk signals to distort the true acceleration waveform data on the primary axis.

• Can this device be deployed in explosive gas environments?

  No, this specific configuration variant features the -00 agency code, meaning it lacks intrinsic safety barriers or explosion-proof certifications.