AMETEK MX CTSH - Manual (Page 122)

User Manual MX Series CTSH Compliance Test System
California Instruments Revision G 119
Field / Control Description
Voltage Variations.
Either one or both sequences can be selected for execution.
Output Select The output selection is shown to the left. If a 3 phase AC/DC power
source model is used, this field allows selection of output channel A, B, C
or all three channels (outputs). The same test sequence is applied to all
selected outputs. For single phase power systems, this field defaults to
channel A.
Start Starts the EN 61000-4-29 test using the parameters set by the user. Test
progress is shown at the bottom of the window.
Abort Aborts test in progress.
13.2 Setting nominal values
The EN 61000-4-29 test requires setting of the rated nominal DC voltage of the EUT. The nominal values
must be entered in the Test Setup Nom. Vdc data field before starting a test. When the EN 61000-4 test
windows is first opened, the present DC voltage setting is automatically loaded as the nominal Vdc value.
This value is overridden by selecting each data entry field and typing in a new value or by loading a test file
from the File, Open menu. Thus, test data files also contain the nominal Vdc voltage to be used.
13.3 Test sequence
The test sequence implemented by this test consists of a series of DC voltage dips (to less than DC
nominal) or interruptions (dip to zero volt). It is also possible to select voltage variations which cause the
DC voltage to change at a programmed rate to a specified level and then return at the same or a different
rate to the nominal DC level. The objective of this test is to evaluate a product for immunity from such dips,
interruptions and variations.
These dips and variations can be applied at different levels and durations for different product categories.
The user must determine the product class and select the appropriate test file. The selected levels and
durations are visible on screen and can be edited and saved to a new setup file if needed. This allows a
library of test files for specific product categories to be created. The .429 file loaded determines the test
levels and DC nominal values used. It can also contain information on the EUT and operator. The
maximum number of steps that can be defined is 100 for both Dips/Interruptions and Variations.
These parameters can be entered on screen by the operator or loaded from disk. To load a new test or test
class, select the File, Open menu. The default location for IEC test files is:
C:\Program Files\California Instruments\Mxgui\IEC_Test. The following duplicate sets of EN 61000-4-29
test files are distributed with the MXGUI program:
For PC's using US Windows Settings (period as decimal separator), use the following files:
Generic IEC 1000-4-29 Voltage Variations.429
Generic IEC 1000-4-29 Voltage Dips.429
Generic IEC 1000-4-29 Voltage Dips Ints and Vars.429
Generic IEC 1000-4-29 Voltage Dips and Interruptions.429
Generic IEC 1000-4-29 Short Interruptions.429