Rockwell Automation 441-PEN25 Enpac Ex Data Collector - Manual (Page 40)

Publication GMSI00-UM001A-EN-E - February 2005
34 Setting Up Measurements
gSE filters
Use a gSE filter to detect bearing and other component defects. The gSE
filters provide a demodulated measurement similar to the "envelope"
measurements in other instruments. You can use gSE filters with the following
measurement definitions:
• Magnitude
• Spectrum
These six gSE filters are available in the Enpac Ex. If you select the Envelope
filter, Emonitor automatically picks the 5 kHz gSE filter.
IMPORTANT
Filters in Emonitor are referred to as software filters.
Filters in data collectors are referred to as hardware filters.
Hardware filters alter the signal in the Enpac Ex. Emonitor
software filters alter the signal (data representing the signal)
after you unload the data into Emonitor. In general, if the
filter you want to use is available in both Emonitor and in
the data collector, it is to your advantage to use the
hardware filter in the data collector.
Hardware filters have the following advantage:
They can remove low frequency, high amplitude signal
components that would dominate the dynamic range in the
data collector. This results in improved amplitude
resolution of the remaining signal range.
Software filters have the following advantage:
If there is no corresponding filter in the data collector, or
you choose not to use it, Emonitor can apply a digital filter
after you unload the data from the data collector.
100 Hz gSE (6000 CPM)
200 Hz gSE (12000 CPM)
500 Hz gSE (30000 CPM)
1000 Hz gSE (60000 CPM)
2000 Hz gSE (120000 CPM)
5000 Hz gSE (300000 CPM)