Rockwell Automation 1441-DYN25-Z Dynamix 2500 Data Collector - Manual (Page 75)

Rockwell Automation Publication 1441-UM001B-EN-P - September 2012 75
Setting Up Measurements Chapter 3
Setting Up Collection
Specifications Measurement definitions are controlled in part by the collection specification
(Setup > Collection). You select the collection specification when you set up the
measurement definition. You can create new collection specifications based on
your specific measurement by choosing Setup > Collection.
Figure 13 - Collection Specification Dialog Box
The transducer specification used in the collection specification includes both
the base unit and the calibration value.
Edit the Measurement Definitions
The Emonitor software does not allow you to change some of the information for
a measurement definition after you collect data for that measurement definition.
This prevents you from collecting and then comparing data with different
measurement definition selections. You cannot edit the Data Type or Units
columns in the Measurement Definition dialog box after you collect data You
can, however, change the Collection, Filter, and the Storage columns for a
measurement definition after collecting data.
The figures in a typical measurement setup in the following sections refer to
making selections in these dialog boxes. For example, a table for STD (HZ) 2000
collection specification would look like this.
Measurement
Input Type
Measurement
Window Type
Measurement
Maximum
Frequency
Measurement
Zoom
Measurement
Resolution
Measurement Signal
Detection Type
Number and Type of
Averages
Orders Track
Magnitude and Phase
Measurement at
Orders
Magnitude and Phase
Measurement at
Orders
IMPORTANT Changing the collection specification can make it difficult to
compare data after the change with data before the change.
Table 19 - STD (Hz) 2000 collection specification
Transducer Window Signal Detection Fmax Lines Phase? Order Norm? Averages
Accelerometer Hanning Peak 2 kHz 400 No No 4 linear