Rockwell Automation 441-PEN25 Enpac Ex Data Collector - Manual (Page 130)

Publication GMSI00-UM001A-EN-E - February 2005
Glossary 124
band alarm
An alarm that operates on defined frequency bands in a measurement. Each
band can have its own alarm levels. The band definition determines whether
the alarm in each band is set on the band maximum amplitude or the band
sum.
band filter
A filter to use during data collection to help obtain high quality data. You can
use a band filter (high pass. low pass, or both) or a percentage filter to remove
specific frequency ranges from the measurement.
band maximum amplitude
Also known as peak in band and band peak. The maximum amplitude is the
highest amplitude at a spectral line in a band.
band set
One or more bands, each of which defines a specific frequency range. A band
set might contain three bands: from 500 to 1200 Hz, from 2000 to 3800 Hz,
and from 3800 to 5000 Hz. You can use a band set to define specific frequency
ranges for a band alarm.
band sum
Also called band limited overall value. This is the total energy in a spectrum
between two frequencies. If the band contains the entire spectrum, the band
sum value is the same as the magnitude value for the entire spectrum.
baseline measurement
A reference measurement you identify from the archive data for a
measurement definition. It indicates the proper operating condition of a piece
of equipment. You can use it as a comparison to other measurements, and in
alarms.
collection specification
The collection specification defines the parameters used when collecting a
measurement. This includes the type of transducer, windowing factor, signal
detection, frequency range, resolution, number and types of averages, and
whether to collect phase and order normalize the measurement.