AMETEK CTS 3.0 - Manual (Page 90)

Compliance Test System 3.0 User Manual
86
Field /
Control Location Description
100 %.
Voltage - rms
(Ut) Center
panel Displays the Root Mean Square voltage of the AC source output for
each acquisition window. Acquisition windows are 10 ms for 50 Hz
EUT‟s and 8 ms for 60 Hz EUT‟s.
d
max
% Center
panel Displays the present Maximum relative voltage change (d
max
) in %.
This represents the difference between the maximum and minimum
rms values of the voltage change characteristic relative to the
nominal voltage. The standard requires that d
max
must be less than
or equal to 4 % for the EUT to PASS.
d
c
in % Center
panel Displays the present Relative Steady State voltage change (d
c
) in
%. This represents the difference between two adjacent steady-
state voltages relative to the nominal voltage. The standard
requires that d
c
must be less than or equal to 3 % for the EUT to
PASS.
Plt # n Center
panel Displays the present Long Term Flicker value for Pst period number
n. The Plt period is 120 minutes and is calculated using successive
Psti values. The threshold of irritability for long term flicker is 0.65
and this value is used as the PASS/FAIL limit.
Instant. Pst Center
panel Displays the instantaneous Short Term Flicker value. At the end of
each 10 minute period, this value will be the Pst for the period.
Psti #n Center
panel Displays the present Short Term Flicker value for period n. The
Short Term Flicker severity is evaluated over a period of 10
minutes. The threshold of irritability is Pst = 1 and this value is used
as the PASS/FAIL limit.
Select Test Test
selection This combo box allows one of three test modes to be selected:
Test all Flicker parameters
Test dc and dt only
Test Pst only
Test Margin Test
Margin This field allows the user to set the test margin from 50 % to 150 %.
Additional information on setting a test margin is shown later in this
chapter.
Graph Display Graph
panel The graph panel is used to display either d
c
and d
t
or Ut rms as a
function of time. The user can change display modes using the
Graph mode drop down box located directly above the graph itself.
Graph mode Display
mode /
Print panel The Flicker module allows the user to toggle between two display
modes. One mode shows the dc and dt as a function of time. The
other mode shows the Ut rms value as a function of time. Each
mode shows a time windows of about 2 seconds and is updated
once every 2 seconds.
Test File Bottom
panel This fields shows the currently selected test data file. It also
provides a File button which can be used to change the selected
test data file. The test data file is the file to which new data will be
written while a test is running. Once a test is started, this button in
disabled as the test data file cannot be changed while it is in use by
the program. Note that the actual file name may be too long to fit in
the space provided on screen. If this is the case, use the File button
to display the file dialog box which will allow you to see the entire
path and file name.
Test Duration Bottom The test duration is the total test time selected by the user. This