Description

The Bently Nevada 3300/35, also cataloged as the 3300/35 RTD Temperature Monitor, operates as a dedicated hardware component for continuous thermal tracking within 3300 Machinery Protection System platforms.

Hardware Specifications

Machinery Monitoring and TSI Characteristics

This temperature module monitors continuous thermal gradients on critical bearing surfaces to safeguard machinery against failures related to aggressive rotor dynamics. Specifically, the internal conditioning electronics process resistance variations from multi-wire RTD arrays to compute real-time structural temperatures. Subsequently, the module transmits these digitized health parameters across the passive rack backplane to adjacent protection cards. Furthermore, the localized circuitry enforces cross-talk suppression between high-density sensor lines to prevent common-mode electrical noise injection. Consequently, this stable processing core isolates temperature loops from high-frequency variations, ensuring that auxiliary systems can perform reliable gap voltage validation targeting standard -10 VDC operational baselines on adjacent proximity sensors without thermal calibration drift.

Frequently Asked Questions

Q: How do you adjust the 3300/35 monitor to match a different RTD material type?

A: You alter the internal sensor selection profile using plug-in hardware jumpers located on the main circuit board assembly. Subsequently, you must install matching scaling resistor packs to modify the input bridge circuit before executing final loop calibration.

Q: What specific action does the module execute if an external RTD lead wire breaks?

A: The onboard diagnostic loop immediately detects the open-circuit condition. Subsequently, the monitor disables normal alarm voting logic for that channel, illuminates the front-panel error indicators, and drives the analog recorder output to its maximum limit to flag a Not OK status.

Field Installation Guidelines

First, insert the 3300/35 card guide into an available chassis slot within the 3300 rack frame, tightening the front panel thumbscrews to secure the physical ground path. Subsequently, route all field-side sensor leads through independent, grounded metal conduit to maintain optimal cross-talk suppression. Always isolate the low-voltage RTD cables from high-voltage plant power distribution conduits to prevent electromagnetic induction. Finally, connect the outer signal cable shields to the single-point instrument earth terminal; this exact deployment paths ambient common-mode current loops away from the internal microprocessor core.