Hardware And Firmware Design - Allen-Bradley 1444-TSCX02-02RB User Manual

Monitoring system
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Input: Sine-wave, 0.707 RMS (-5 to -3V), ADC FMAX = 4578 Hz, 0.1 Hz HPF
Measurements (volts RMS)
Values that are stated as "avg" are approximate as the measurement is varying by >10%
Frequency
TC=0.5 (Default)
OAO
60
0.717
50
0.715
40
0.715
30
0.716
20
0.711
15
0.717
10
0.710
9
0.710
8
0.720
7
0.715
6
0.71 avg
5
0.72 avg
4
0.71 avg
3
0.71 avg
2
0.71 avg
1
0.68 avg
0.5
0.64 avg
0.25
0.65 avg
Table 74 - Input: Sine-wave, 0.707 RMS
TC=30
OA1
OAO
0.716
0.715
0.715
0.715
0.716
0.715
0.716
0.715
0.710
0.715
0.717
0.715
0.720
0.715
0.710
0.715
0.710
0.715
0.715
0.715
0.71 avg
0.715
0.71 avg
0.715
0.71 avg
0.715
0.71 avg
0.714
0.71 avg
0.715
0.68 avg
0.715
0.68 avg
0.714
0.44 avg
0.708
OA0 = Post Filter, OA1 = Mid-Filter

Hardware and Firmware Design

The module hardware is designed to provide accurate, repeatable
measurements, over a range of operating and environmental conditions.
Selected components such as the precision of the 24-bit Analog to Digital
converters, or the delta-sigma hardware anti-alias filters, directly affect
measurement precision and accuracy. Design elements that provide sources of
error or noise also affect measurement precision and accuracy.
Sources of error can include circuits that amplify or attenuate signals, which
include components that have a precision tolerance, which then add to the
potential error in the measurement. To minimize these errors, the 1444 design
helps eliminate these circuits where the same function can be performed in
firmware.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
TC=60
Tracking Filter
OA1
1xM
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.715
0.714
0.715
0.714
0.714
0.711
0.712
0.697
0.702
0.664
0.664
0.573
0.556
Operate the Module
Chapter 10
RPM
1xP
81
3600
81
3000
81
2400
81
1800
81
1200
81
900
80
600
80
540
80
480
80
420
80
360
79
300
79
240
77
180
75
120
70
60
57
30
40
15
299

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