Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 315)

Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012 315
Glossary
The following terms and abbreviations are used throughout this manual. For
definitions of terms not listed here, refer to the Allen-Bradley Industrial
Automation Glossary, publication
AG-7.1 .
active data collector You can define one or more data collectors as active. Emonitor uses the active
collectors to determine the valid options when you set up measurement
definitions. Suppose you had two active data collectors:
• DC1 can measure velocity in both in/sec and mm/sec
• DC2 can measure velocity only in in/sec
The only choice you would see for velocity units would be in/sec, because that is
common to both active collectors. This is true for several options in Emonitor,
including the number and length of inspection codes.
active list The list for which you are currently collecting data. You can load multiple lists
into the Enpac 2500. You can only collect data for one list at a time.
alarms An alarm alerts you to a change in a measurement. For example, an alarm can
notify you when the measured value for a machine exceeds a pre-defined value.
You can create one or more alarms for each measurement definition.
archive data The measurement data that you store in Emonitor. It includes all the magnitude,
process, time, and spectral data that you have collected and unloaded or entered
into the program.
averaging Refers to the process of combining multiple data samples to reduce the random
errors and provide a more reliable measurement.
band A frequency range, such as the frequency range between 1,800 and 3,200 Hz. A
band set consists of one or more bands. You can use bands to define specific
frequency ranges and values used - band maximum amplitude or band sum - for a
band alarm.
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.