7.1.2 CTY - Continuity
The continuity test is available to be placed as the first test in the program to check that the transformer has been inserted correctly into the test fixture. The test checks that every winding has a resistance less than a user specified limit, with the same limit being applied to all windings.
The CTY test is an alternative to using an R (Winding Resistance) test on each winding separately. The CTY test has the advantage of speed of execution; but with the R test, individual limits can be applied to each winding, and manufacturing faults such as the use of the wrong wire gauge can be identified.
If you choose to use it, the continuity test will be quicker to execute than a series of resistance tests applied to each winding.
SPECIFYING THE TEST LIMIT
When specifying the test limit, remember that the same limit is applied to each winding, so you must choose a value higher than the resistance of the biggest winding. For most transformers, where the winding resistances are less than 1kΩ, a test limit of 10kΩ should be used, as this will give the quickest test execution.