AMETEK CTS 3.0 User Manual
Page 80
Compliance Test System 3.0
User Manual
76
Field / Control
Location
Description
source. If no AC source control option is selected, the operator has to
use the front panel of the AC source instead and this button will not be
available. In manual mode, the operator must click on the Power On
button to turn on power to the EUT.
WINDOW
DATA
The data in the Window Data frame on the left side of the main
harmonics screen applies to successive acquisition buffers. Acquisition
buffers are 320 ms for 50 Hz EUT‟s and 266.67 ms for 60 Hz EUT‟s if
the 16 Cycle window size is selected. If the 10/12 cycle window size is
selected, the buffer size is 200 msec.
Frequency - Hz
Left panel
Displays the AC signal frequency in Hz. If the frequency is not 50 or 60
HZ, “F???” will appear in the field of VTHD and Source Qual. The test
will continue however but the results may not be valid.
Voltage - RMS
Left panel
Displays the Root Mean Square voltage of the AC source output for
each acquisition buffer.
Current - RMS
Left panel
Displays the Root Mean Square current to the EUT for each acquisition
window.
I peak
Left panel
Displays the peak current value of the EUT current. If the EUT
produces no harmonic currents, the peak current is 2 times the RMS
current.
I Fund
Left panel
Displays the value of the fundamental current of the EUT for each
acquisition window. The fundamental current is the current at 50 Hz or
60 Hz only, without any contributions from higher order harmonic
currents. If the EUT produces no harmonic currents, the fundamental
current will be the same as the rms current.
Crest Factor
Left panel
Displays the crest factor of the EUT current. Crest factor is the ratio
between the peak current and the RMS current.
VA Power
Left panel
Displays the apparent power consumption of the EUT for each
acquisition window.
Power - Watts
Left panel
Displays the real power consumption of the EUT for each acquisition
window.
Power Factor
Left panel
Displays the ratio between real power and VA power of the EUT for
each acquisition window.
Window Result
Left panel
Indicates if the present acquisition buffer current harmonics exceed the
selected EUT current limits. If one or more acquisition buffers report a
failure, the overall test result will fail. This field will typically toggle
between good and fail during the test run.
VTHD
Left panel
Indicates if the present acquisition buffer has a voltage distortion that
exceeds the IEC limit.
Test Number
Bottom Left
Each test run is assigned a sequential test number. The number for
the current test is displayed in this field. This allows individual test
results to be tracked.
Test Result
Bottom Left
This field provides a visual indication of the test result. A Green field
with Pass indicates the EUT current harmonics are below the limit, a
Red field with Fail indicates the EUT current harmonics are above the
limit. Note that the condition of this field is affected by the user selected
test margin. To use the actual IEC test limits, the test margin should be
set to 100 %. This field depends on the “Window results” of all the
windows up to this test time and if any “Window result” is failed during
a test, Test result will
be “Fail”. In other words, this field is “Fail”
latching.
Source
Qualification
Bottom Left
This field displays overall AC Source voltage distortion status for the
test so far. At the end of the test, this field indicates if the AC Source
failed the voltage distortion test at any time during the test.
The VTHD indication is given to notify the user of a possible problem
with the AC source voltage distortion, which may invalidate the test
results. The test will not be aborted however if the voltage distortion is
too high.