Rockwell Automation 1441-DYN25-Z Dynamix 2500 Data Collector - Manual (Page 62)

62 Rockwell Automation Publication 1441-UM001B-EN-P - September 2012
Chapter 2 Configuring the Dynamic 2500 Data Collector
Mach. Speed Controls the amount of time auto-ranging will wait to be sure it has seen the peak signal value of the sample.
When faster data collection is desired, set Autoranging to `Aggressive’ and Mach. Speed to `Normal.’
Settling Delay The amount of time the instrument should delay data
acquisition after applying power to an ICP accelerometer.
The specified delay applies only to the first ICP
measurement after turning ICP on, for example, the first
measurement at the start of a ROUTE or a measurement
following a non-ICP measurement
After the first measurement, data acquisition times are not
affected. If ski slope anomalies occur, try increasing the
settling delay by one or two seconds.
0.00…60.00 s
5.00 s (default)
Memory Configures the data collector’s memory.
Table 14 - Instrument Configuration Parameters
Parameter Description Value
Value Description
Normal Sets the auto-ranging algorithm to only track signals above 120 rpm. Therefore, use this setting
when the machine speed is greater than 120 rpm.
The normal speed setting guarantees the waiting time be no longer than 0.5 seconds. It will
significantly improve auto-ranging times and therefore data collection times for any points that
have low filters (<2 Hz) selected.
Slow Sets the auto-ranging algorithm down to the Low Pass Filter setting. (If none, it will track down to
approximately 0.33 Hz or 20 CPM.) Therefore, use this setting when the machine speed is less than
120 rpm.
The slow speed setting enables low frequency auto-ranging to accommodate collection of low
frequency components. For slow speed equipment, this is necessary to be sure adequate sampling
and collection of the peak signal. The slow speed setting allows the Dynamix 2500 data collector to
auto-range on machines running as slow as 20 rpm. The auto-ranging algorithm makes an
assumption about the speed of the machine that is being monitored to determine how long to wait
for the peak signal value to be seen. With the slow speed setting, the wait-time is calculated as 1
/ f
hpf
where f
hpf
is the high-pass filter cutoff in Hz for the current point.
For example, if a 0.36 Hz filter is selected, the auto-ranging algorithm will wait for 1 / 0.36 = 2.78
seconds to make sure it has seen the peak signal value.
Auto (default) Select to have the Dynamix 2500 automatically select Normal or Slow depending on the
measurements speed setting specified by Emonitor.
Value Description
Select cmd: Default Exit this parameter without selecting an option.
Purge Marks all the points on the route as taken, sets the current reading to be
the previous reading for each point, and deletes all the Offroute data.
Delete route Deletes the current route in memory.
If you have an internal or SD storage card, the route to be deleted
depends on what you have chosen on the Setup Utility screen.
Delete all routes Deletes all routes and data in memory.
If you have an internal or SD storage card, the route to be deleted
depends on what you have chosen on the Setup Utility screen.
Initialize Formats the active memory. Note this will delete all routes and data in
active memory.
TIP Configure only when you open data collection. You must have a Route
open for the memory option to display. A Route must be in active
memory.