Owner manual

Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012 73
Setting Up Measurements Chapter 2
Measurement Resolution
The measurement resolution is part of the collection specification (Setup >
Collection). See
Setting Up Collection Specifications on page 69. You select the
collection specification when you set up the measurement definition.
Emonitor and the Enpac 2500 support the following resolutions.
The values that appear in the Number of lines drop down list in the Collection
Specification dialog are those for spectrum measurements. Emonitor uses the
corresponding number of time samples from the table above for time
measurement definition.
You can calculate the number of time samples from the number of spectral lines
using the following formula.
You can calculate the total time required to collect a time waveform measurement
from the Number of lines value and the Maximum frequency value in the
Collection Specification dialog (Setup > Collections).
If your Maximum frequency is specified in CPM, convert CPM to Hertz using
the following formula.
Table 16 - Measurement Resolutions
Spectral Lines Time Samples
100 256
200 512
400 1024
800 2048
1600 4096
3200 8192
6400 16,384
12,800 32,768
time samples spectral lines 2.56=
Fmax (Hz)
Fmax (CPM)
60
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