User manual

User Manual Compliance Test System 3.0
Field /
Control
Location Description
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 %.
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
p
ro
g
ram. Note that the actual file name ma
y
be too lon
g
to fit in
California Instruments Revision N 89