3300/50 Introduction

The 3300/50 Tachometer continuously measures shaft rotative speed, rotative acceleration, or provides an output for zero speed indication. The tachometer provides a proportional voltage or current output on the rear terminal strip and supplies Alert status via relay contacts for use with an external annunciator panel.

Although a single channel monitor, the 3300/50 Tachometer accepts inputs from two transducers. Voting logic between the two transducers is internal to the monitor, minimizing false indications in the event of a single transducer failure.

Bently Nevada 3300/50 Tachometers are not designed for use independently as, or as a component of, a speed control or overspeed protection system. Bently Nevada 3300/50 Tachometers do not provide protective redundancy and the response speed needed for reliable operation as a speed control or overspeed protection system. Where provided, the analog proportional output is suitable for data logging or chart recording purposes only. Also, where provided, speed alert setpoints are suitable for annunciation purposes only.

Failure to take the above warnings into account constitutes a misuse of the product and may result in property damage and/or bodily injury. When applications require machine overspeed protection, use Bently Nevada's 3300/53 or 3500/53 Electronic Overspeed Detection Monitors instead