3.4 Programming Tests
This section describes in more detail how to fill in the data for the dialogue boxes for each of the tests available for your AT3600.
By the end of this chapter you will be able to program any of the following tests:
| Test Type |
| Continuity |
| Resistance (dc) |
| Resistance (ac), series or parallel |
| Inductance, series or parallel |
| Inductance with Internal Bias |
| Quality Factor |
| Dissipation factor |
| Leakage Inductance |
| Inter-winding Capacitance |
| Turns Ratio |
| Turns Ratio By Inductance |
| Impedance |
| Impedance with Internal Bias |
| Inductance Match |
| Capacitance Match |
| General Longitudinal Balance |
| Longitudinal Balance |
| Insertion Loss |
| Frequency Response |
| Return Loss |
| Impedance Phase Angle |
| Inter Winding Phase Angle |
|
|
| Test Type |
| Trimming Adjustment |
| Output To User Port |
| Insulation Resistance |
| Hi-Pot (DC) |
| Hi-Pot (AC) |
| Surge (Impulse) |
| Wattage |
| Wattage (External Source) |
| Stress Wattage |
| Stress Watts (External Source) |
| Magnetizing Current |
| Mag. Current (External Source) |
| Voltage Open Circuit |
| Voltage O/C (External Source) |
| Low Voltage Open Circuit |
| Leakage Current |
| Inductance with External Bias |
| Impedance with External Bias |
| Hi-Pot Ramp (AC) |
| Hi-Pot Ramp (DC) |
| Voltage Break Down (AC) |
| Voltage Break Down (DC) |
|
SEE ALSO:
Chapter 7 - ‘Test Conditions’ for help with selecting the tests and test signal conditions that you need.
AND:
The tester’s measure mode can also be used to determine the nominal values of a new part. See section 3.9 of this chapter.
3.4.1 Continuity
The continuity test can 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, 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, to give confidence, for example, that the correct wire gauge has been used.
On selecting ‘CTY - Continuity’ from the available tests window, the following dialogue box will be displayed:
To program the test:
- Enter the maximum resistance limit.
Remember that there is only one limit, and the same value will be applied to all windings.
If all the windings on your transformer have small resistance values, then choose the value of 10kΩ, to give the quickest test execution.
If any winding has a resistance greater than 10kΩ, then choose a value bigger than that expected for the winding with the largest resistance.
- Select OK. The test specification will then be displayed in the program window.