Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 68)

68 Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012
Chapter 2 Setting Up Measurements
RSS Overall
The Enpac 2500 allows you to take a digital overall measurement, instead of
analog. This set up makes measurement collection faster. Be aware that this Root
Sum Squares (RSS) overall value is not as complete because it does not include
the power in the signal from below the first spectral bin or above the highest
spectral bin. Please note that the RSS overall values may not trend well with
analog overall measurements.
To use the RSS filter, you must create a Band Filter in Emonitor. Choose Setup >
Band Filter and click New. Then select RSS (digital) as the filter type.
Figure 9 - RSS Filter
Measurement Units
Emonitor and the Enpac 2500 support many different measurement units. The
measurement units that appear in the Enpac 2500 are text that depend on:
• the type of measurement definition.
• the units for the measurement definition.
• the transducer specification used in the collection specification for the
measurement definition.
IMPORTANT The available filters in Emonitor depend on the data collectors you select as
active data collectors using Tools > Set Active Collectors. If you have two or
more active data collectors, you may not see all the selections available for
the Enpac. If you have no active data collectors, you see all the selections for
every data collector, not just the selections for the Enpac.
IMPORTANT Using the 0.36 Hz (21.6 CPM) low cutoff filter for integrated measurements
or the 0.18 Hz (10.8 CPM) low cutoff filter for non-integrated
measurements will always cause the Enpac 2500 to go into a long
autorange mode. Only use these filter settings when very low frequency
data is required.
Select to use the RSS filter