Allen-Bradley 1444-TSCX02-02RB User Manual page 301

Table 75 - Typical Measurement Resolution
Measurement Sensitivity
Type
Acceleration
Velocity
(integrated)
Velocity
Displacement
Thrust (DC)
Dynamic Pressure
Full Scale Range
The module does not apply amplifiers or attenuator to the analog signals to
"scale" signals to some "full scale" value. Rather the module relies on its
precision 24 bit A/D and further digital processing to accommodate
measurement requirements. The 1444 does not provide a "full scale range" in
the same manner as older instruments.
When considering resolution and accuracy, rather than providing values
referenced to a possible "full scale range", the following reference values to a
"typical range or alarm limit", which vary with the selected engineering units
and application.
Measurement Resolution
The 24 bit A/D has a theoretical resolution of 3 μV. However, for practical
purposes, an input signal of 0.5 mV peak-to-peak is considered more
representative of real world applications, and as a more realistic minimum
resolution. Based on this assessment the following table presents typical
resolutions, in Engineering Units, and as a percent of a typical range or alarm
limit for various measurement types.
Typical Range or Alarm Limit
100 mV/g
100 mV/g
100 mV/g
4 mV/mm/s
100 mV/ips
8 mV/micron
200 mV/mil
8 mV/micron
200 mV/mil
100 mV/psi
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
EU (at 0.5 mV Input)
40 g RMS
25 mm/s RMS
1 ips RMS
25 mm/s RMS
1 ips RMS
125 micron pk-pk
5 mil pk-pk
2 mm
80 mil
2 psi RMS
Operate the Module
Resolution (%)
0.0018 g RMS
0.0018 mm/s RMS
0.000007 ips RMS
0.0442 mm/s RMS
0.0017 ips RMS
0.0625 micron pk-pk
0.0025 mil pk-pk
0.0625 micron
0.0025 mil
0.0018 psi RMS
Chapter 10
0.0045
0.0072
0.0071
0.18
0.18
0.05
0.05
0.003
0.003
0.09
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