AMU Use
24
Improve mode. The duration of the Improve mode is determined by the number of Improve
iterations set from the menu path.
MENU: Edit Settings/Password / Run settings / Improve Iterations
It is recommended that this value be set to between 7 – 10 iterations.
An important difference between this mode and the initial learning period is that
AMU monitors the motor status during IMPROVE but does not during LEARN.
Once the IMPROVE stage is complete, the MONITOR phase will automatically continue
without user intervention. This is the main operating mode and AMU is expected to spend
most of its time in this mode monitoring attached motor systems.
NOTE
In order to start monitoring,
AMU must first have learnt the characteristics of the
motor it is to monitor and have a valid learning mode.
3.4.5.3.
Iteration cycle time
In general a data processing cycle takes between 60 – 120 seconds depending on several
factors. First, AMU requires relatively unchanging data over a minimum time period during
its data acquisition phase and will repeat the data acquisition until it obtains stable data,
thus varying the iteration time cycle. If the amplitude or frequency of the voltage and
current phases varies excessively and stable data cannot be found, an alarm is raised.
Secondly, if harmonic values are being calculated, extra processing cycles are required.
Finally, if AMU encounters an error, it may repeat the cycle several times.
Once started, the monitoring process will continue until one or the other of the following
conditions is fulfilled:
1.
An error condition is generated and canceled.
2.
The user presses the CLEAR button to cancel the process. In order to prevent
unauthorized access, if the Local Lockout setting is set a password must first be
entered.
3.
Power to the AMU unit is cut.
Содержание AMT Toolkit
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Страница 34: ...Equipment Faults Diagnosis and Reporting 32...
Страница 69: ...Appendices 67 7 6 Appendix 6 Flowcharts for AMU use 7 6 1 Running AMU Edit Settings and Check Motor...
Страница 70: ...Appendices 68 7 6 2 Running AMU Learn...
Страница 71: ...Appendices 69 7 6 3 Running AMU MONITOR IMPROVE UPDATE...
Страница 72: ...Appendices 70 7 6 4 Running AMU Alarm conditions...
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