D30R Users Manual
78
Do Not Touch Test Leads while test is in Progress!
71-023 Rev C 5/8/2007
2.
Press the key corresponding to QUICK STORE. The wave pattern
is now stored in Record #1, Lead #1 and is immediately recalled
on the screen.
b.
Store the pattern conventionally if the tests are to be downloaded to a
pc for further analysis.
1.
Press the function key corresponding to STORE. A list of
available records appears.
2.
Press the keys corresponding to the UP and/or DOWN to bring the
cursor to the desired Record. Press SELECT.
3.
Repeat step 2 above for the desired lead.
Note
: The flicker in wave patterns that is observed when there is
arcing between the windings or phases cannot be stored in the Digital
tester. As soon as the TEST button is released, the wave pattern
freezes. This is the only wave pattern that can be stored.
It is desirable to store the wave pattern production by this arcing for
reference. The operator must attempt to release the TEST (thus
freezing the wave pattern for storage) at the moment when the wave
pattern appears the most affected by the fault (reduced amplitude and
higher frequency).
11.
Change the TLS to position #2 and test again.
Note:
It is convenient to store the results of a single motor into a single
Record. Store the two wave patterns for the coil into two Lead
locations for the desired Record. The results of up to ten motors can be
stored on the Digital tester.
In summary, for each direction the coil is tested, check the display for the wave
pattern produced in each test. If there are two good stable patterns, the winding
is good. If anything other than good patterns is seen, there is a possible fault.
Refer to the chapter on Determination of a Fault for explanations of wave
patterns indicating good or faulty windings. For determination of wave patterns
for a variety of devices refer to Surge Test Applications. Keep in mind, fault
determination is often a result of experience.
Example: Comparison to a Master Coil
Summary of Contents for D30R
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