Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 317)

Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012 317
Glossary
harmonic cursors Multiple cursors that are at constant multiples of a fundamental frequency.
Typically you position a single cursor at the desired fundamental frequency and
then press a key to activate the harmonic cursors. These cursors help identify the
related frequency components in a spectrum
Hierarchy Tree A graphic illustration of the database hierarchy in Emonitor. It contains the
machines in your predictive maintenance system.
high pass filter A filter that excludes all frequencies below a defined frequency, also called a low
frequency corner. It allows, or passes, frequencies above the defined frequency. It
is useful for removing high vibration, low frequency signal components that
would dominate the signal.
inspection codes Some data collectors allow you to store an inspection code with a measurement.
Inspection codes, also called note codes, can e used to indicate the operating
condition of a piece of equipment (for example, hot bearings, stopped, etc.).
They can also be assigned directly to an item in the Hierarchy Tree or location, or
by importing data.
list A set of measurement definitions, also called a route. You can create a list from
individual measurement definitions or from other lists. A list can be saved in, and
recalled from, the database. The most recently recalled or created list is called the
current list. You can load one or more lists into a data collector, and you can plot
or report on the data from the items in a list.
list type List types allow you to group lists by their function. For instance, you might
group lists like this.
List window A window that contains a display of locations in the current list. A list is a set of
measurement definitions. You can open only one List window, and the List
window cannot be split into panes.
load file When you load a list into a data collector, Emonitor first creates a load file from
the list. The load file contains all the measurement definitions in the list, in a
format that can be loaded into the data collector. Emonitor can create load files
ahead of time from Quickload lists.
location A location can be a physical point in a plant, in an area, on an equipment train, or
on a machine. For vibration measurements, a location is a combination of a
physical point and a direction for the measurement. Each location is attached to
an item in the Hierarchy Tree.
low pass filter A low pass filter excludes frequencies above a defined frequency. It allows, or
passes, frequencies below the define frequency. It is useful as an anti-aliasing filter.
Purpose List type
Everyday data collection Scheduled
In-depth assessment Diagnostic
One-time collection Temporary