Rockwell Automation Publication 1441-UM001B-EN-P - September 2012 157
Collecting and Reviewing Data Chapter 5
Input channel Maps the input channel to the LEMO connectors on the top of the
Dynamix 2500 data collector. Input channel X maps to Connector A
(pin 2):
• Input channel Y maps to Connector B (pin 2); it is also linked to
Connector A (pin 6).
• Input channel Z maps to Connector A (pin 3); it is also linked to
Connector B (pin 7)
X (default)
Y
Z
X & Y
Z & Y
X, Y & Z
Input channel X, Y & Z (3 channels) and X, Y, Z & R (4 channels)
are optional upgrades. You can activate the 3 and 4-channel
functionality with the 4-channel activation, cat no, 1441-
DYN25-4C.
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 transducer’s 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…25600 spectral lines.
For time waveforms: 256…65536 time samples.
400…1024 (default)
Table 43 - Offroute User Parameters
Parameter Name Description Values/Comments
Detection Description
RMS The Dynamix 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 Dynamix 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 Dynamix 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.
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