Description

The Bently Nevada 3300/50-01-01-00-00, also cataloged as the 3300/50 Tachometer Monitor, operates as a dedicated hardware component for continuous high-speed shaft rotational velocity tracking and machine speed measurement within 3300 Monitoring System platforms.

Suffix Breakdown & Model Matrix

• 01: Full-scale range option (Standard rpm scale configuration)
• 01: Transducer input selection option (Proximity probe or magnetic pickup compatibility)
• 00: Alarm relay hardware configuration option (No internal relays installed in monitor slot)
• 00: Factory standard agency approval option

Hardware Specifications

Machinery Monitoring and TSI Characteristics

The internal processing hardware applies exact eddy-current probe scaling matrices to transform raw tooth-passing or keyway pulse signals into high-resolution rotational frequency data. When utilizing proximity type sensors for speed event capture, the circuitry runs continuous gap voltage validation (-10 VDC targets) to verify that the transducer remains positioned optimally within its linear voltage window. Consequently, this monitoring avoids pulse dropout or signal loss caused by machine casing thermal expansion or axial movement during startup. To preserve input signal integrity in dense multi-channel instrument racks, integrated cross-talk suppression filters isolate the active frequency bus lines, providing clean speed profiles required to verify critical rotor dynamics.

Frequently Asked Questions

Q: Why does this configuration display “00” for the alarm relay hardware option?

A: The “00” option indicates that no physical mechanical relays reside directly on this card assembly. Speed alarm indicators pass digitally across the rack backplane to trigger a common, separate 3300 system relay module when threshold limits are breached.

Q: Can this monitor determine and display the rotational direction of the shaft?

A: No. The internal logic tracks only the raw frequency of passing teeth or notches. If your machine requires reverse rotation protection, you must use a specialized multi-channel direction-sensing monitor instead.

Field Installation Guidelines

• Disconnect all primary rack backplane power feeds prior to sliding the monitor card assembly into its designated chassis slot to prevent edge connector damage.
• Route all speed sensor and Keyphasor input cables through dedicated, isolated metal conduits to separate them from high-current AC lines.
• Terminate all shield drain wires directly at the designated backplane chassis ground strip using a single-point grounding layout to eliminate ground loop currents.