Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 147)

Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012 147
Collecting and Reviewing Data Chapter 4
Input channel Maps the input channel to the LEMO connectors on the top of the Enpac 2500 data
collector. Input channel X maps to Connector CH1 (pin 2):
• Input channel Y maps to Connector CH2 (pin 2); it is also linked to Connector A
(pin 6).
• Input channel Z maps to Connector CH1 (pin 3); it is also linked to Connector B
(pin 7)
X (default)
Y
Z
X & Y
Z & Y
X, Y & Z
Detection The measurement (or calculation) performed on the input signal.RMS, Peak, Pk-Pk, True Peak, True Pk-Pk
Sensitivity The sensitivity of the transducer. The sensitivity value is included with the
transducers documentation or it may be imprinted on the side of the transducer. Default value is 100m V/EU (Engineering Unit)
Filter Sets the high pass filter to apply to the measurement. The high pass filter is useful
in removing high vibration, low frequency signal components that would
dominate the signal. Off (default)
Set Filter to Off if you do not want to use a filter.
10.8 Hz
21.6 Hz (default)
120 CPM
160 CPM
318 CPM
600 CPM
1428 CPM
4200 CPM
Fmax The maximum frequency for the measurement. 18000 CPM (default)
Lines/Samples The number of lines or bins in the spectrum measurement and the number of
samples in the waveform measurement. This determines the measurement
resolution.
The data collection time increases as you increase the measurement resolution. For spectra: 100…12800 spectral lines.
For time waveforms: 256…32678 time samples.
400…1024 (default)
Table 37 - Offroute User Parameters
Parameter Name Description Values/Comments
Detection Description
RMS The Enpac 2500 data collector measures the dynamic signal as the square root of the mean of the square. Use this or
the Peak setting for most acceleration and velocity measurements. Use this also for time waveform, voltage, and
process (DC) voltage measurements.
Peak The Enpac 2500 data collector measures the dynamic signal from zero to peak voltage. Use this or the RMS setting
for most acceleration and velocity measurements.
Pk-Pk The Enpac 2500 data collector measures the dynamic signal from the minimum peak to the maximum peak. Use
this setting for most displacement measurements.
True Peak Use to detect impacts and random transients. The dynamic time signal contains the absolute value of the largest
peak (positive or negative) within a specified time window. Returns a magnitude value only. If used with a
spectrum measurement, Emonitor uses a Peak detection type instead. This value is not calculated but is measured
directly.
True Peak Pk-Pk Use to detect impacts and random transients. The dynamic time signal contains the absolute value of the largest
peak to peak distance within a specified time window. Returns a magnitude value only. If used with a spectrum
measurement, Emonitor uses a Peak-Peak detection type instead. This value is not calculated but is measured
directly.