Combining measurement definitions for a location – Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector User Manual
Page 93
Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012
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Setting Up Measurements
Chapter 2
Combining Measurement Definitions for a Location
You can use Emonitor to set up many different measurement definitions for data
collection at a location. These can include magnitude, spectrum, time waveform,
and numeric measurements. You can then select the measurement definitions you
want to load to the data collector by creating a list of those measurement
definitions. When you want to load the data collector, Emonitor builds a load file
containing the measurement definitions in the list.
Emonitor combines measurement definitions at each location to make data
collection more efficient. This allows you to collect two or more measurements
automatically, without having to start each measurement separately. The rules for
combining measurement definitions depend on several factors. In general,
however, Emonitor can combine measurement definitions at the same location
when they have the same:
•
Measurement units (part of the measurement definition)
•
Measurement filter (part of the measurement definition)
•
Transducer calibration and input type (from the transducer specification
used in the measurement definitions collection specification)
In addition, there are some specialized cases that allow or prevent Emonitor from
combining measurement definitions from the same location when they meet the
above conditions.
•
In general, Emonitor cannot combine a magnitude and a spectrum
measurement if they have different measurement filters.
•
Emonitor can combine an envelope acceleration magnitude measurement
with a spectrum with the same units.
•
Emonitor can combine a non-filtered measurement definition with a high
pass, low pass, or band filtered measurement when the band filter is
applied by Emonitor after the spectrum is unloaded.
•
Emonitor can combine two signatures if they are the same type (time, fixed
frequency spectrum, order normalized spectrum) and the same resolution.