Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 88)

88 Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012
Chapter 2 Setting Up Measurements
Spectrum Alarms in the Enpac 2500 Data Collector
The Enpac 2500 supports band alarms with up to ten bands.
• You can have the data collector collect a spectrum measurement if a
magnitude alarm is in alarm. Set the Collect and store condition in the
Edit Storage Specification dialog to ‘On Magnitude Alarm’ for the storage
specification for the spectrum measurement definition.
• You must set Trigger to ‘Yes’ for any alarms you want to appear in the
Enpac 2500 during data collection. If you set Trigger to ‘Yes’ for two or
more alarms for the same measurement definition, Emonitor combines the
alarms before sending the combined alarm to the Enpac 2500.
For more on how Emonitor combines alarms before sending them to the
Enpac 2500,
see Alarms and the Data Collector on page 95 .
The Enpac does not support spectrum alarms. You can still set up the alarms for
the spectrum measurement definitions. Emonitor tests the data against the
alarms after you unload the data.
Typical Spectrum Measurement Definitions
This figure shows the setup for typical spectrum measurement definitions. The
first is a standard spectrum, the second is an order normalized spectrum, and the
third is a time synchronous spectrum.
Figure 17 - Spectrum Measurement Definitions
The following table shows the collection specifications (in the same order as the
measurement definition table above).
The following table shows the transducer specification in the collection
specifications.
Table 25 - Collection Specifications for Spectrum Measurement Definitions
Transducer Window Signal Detection Fmax Lines Phase Order Norm? Averages
Accelerometer Hanning Peak 2 kHz 400 No No 4 linear
Accelerometer Hanning Peak 10 orders 400 No Yes 4 linear
Accelerometer Hanning Peak 2 kHz 400 No No 4 time synch.
Table 26 - Transducer Specification in Spectrum Collection Specifications
Name Base Unit Input Type Units Calibration Value DC Offset
Accelerometer Acceleration ICP Accel g 100 0