Emerson CSI A6120 Enclosure Seismic Vibration Monitor

CSI A6120 Enclosure Seismic Vibration Monitor for CSI 6500 Machinery Health Monitor

The Case Seismic Vibration Monitor for use with electromechanical seismic sensors is

designed for high reliability on the plant's most critical rotating machinery.

This 1-slot monitor is used in conjunction with other CSI 6500 monitors

to form a complete API 670 machinery protection monitor.

Applications include steam, gas, compressors and hydraulic turbines.

Casing measurements are common in nuclear power applications.

The primary function of the casing seismic vibration monitor is

to accurately monitor casing seismic vibration, the

and to reliably protect machinery by comparing vibration parameters

with alarm set points, actuated alarms and relays.

A case seismic vibration sensor, sometimes referred to as a case absolute vibration sensor

(not to be confused with a shaft absolute vibration sensor), is an electrodynamic,

internally spring-loaded, and magnetically actuated vibration sensor.

It is an electrodynamic, internal spring and magnet, velocity output type sensor.

A housing seismic vibration monitor monitors the overall vibration

of a bearing housing at millimetres per second (inches per second).

Since the sensor is mounted on the bearing housing,

vibration in the housing can be affected by many different sources.

These include rotor motion, foundation and bearing box stiffness,

blade vibration, adjacent machinery, etc.

When replacing ffeld sensors, many are being updated to piezoelectric sensors,

which provide internal integration from acceleration to velocity.

Piezoelectric sensors are a new type of electronic sensor rather

than the older electromechanical type.

Case Seismic Vibration Monitors are backward compatible

with electromechanical sensors installed in the ffeld.

The CSI 6500 Machinery Health Monitor is an integral

part of PlantWeb® and the AMS Suite.

PlantWeb combines Ovation® and DeltaV™ process control systems

to provide operators with an integrated view of machinery health.

The AMS Suite provides maintenance personnel with advanced predictive

and performance diagnostic tools to accurately determine machine failures at an early stage.