Rockwell Automation 1441-DYN25-Z Dynamix 2500 Data Collector - Manual (Page 61)

Rockwell Automation Publication 1441-UM001B-EN-P - September 2012 61
Configuring the Dynamic 2500 Data Collector Chapter 2
Autoranging Sets the input range during data collection.
• If Autoranging is set to Fixed or Aggressive, the software integration is used on all FFT measurements. This is to give
improved dynamic range and faster hardware settling times.
• If hardware integration is required, set Autoranging to `Conservative.’
• For all autoranging settings (including Fixed), the input range is automatically increased and the data retaken if clipping
occurs. This means that the final input range used will never be too low for the signal being measured.
Table 14 - Instrument Configuration Parameters
Parameter Description Value
Value Description
Aggressive Default
Limits the auto-ranging to 20 mV level and sets the range limits from 1% to 70% of range.
When the input is under-range, the instrument recalculates the most appropriate setting and begin
data sampling. The range will not be adjusted a second time or checked prior to data collection.
Use Aggressive autoranging when faster data collection is desired. When using Aggressive
autoranging, set Auto Store to `Off,’ or set Auto Store Time to `2’ seconds when Auto Store is set to
`On.’
Conservative Allows auto-ranging to go as low as 2 mV and sets the range limits from 10% to 70% of range.
The instrument perform a series of checks prior to sampling data. This will result in longer data
collection times and potentially lengthy acquisition.
When the input is under-range, the instrument recalculates the most appropriate range setting and
sample data to make sure the range has been properly selected. In addition, the dynamic range will
be adjusted several times prior to data collection.
Use Conservative autoranging when large variations in signal amplitude are present for proper input
range selection but increases the settling time required.
Fixed No autoranging measurements are taken. Input range is set based on the transducer type and
sensitivity.
For example, an accelerometer, the input range will be 5 V for 100 mV/G sensitivity or 500 mV for 10
mV/G sensitivity.
Transducer Input Range (EUs)
Accelerometer 50 g
Velocimeter 50 ips
Displacement probe 200 mils
Volts, A.C. 2 V