SECTION 4 OPERATION
49
4.5.2 TRANSIENT EDITING (cont’d)
The following may be programmed:
SEGMENT #: Segments define each “event” of a transient. Each segment provides a linear
transition in volts and/or frequency in the time indicated. Different waveforms
may also be switched in during each segment.
Normally don't enter a number here. It will automatically increment as required.
Up to 50 segments may be used to generate a transient. The total number of
segments for all programs can not exceed 500. If you want to edit a specific
segment you may enter that segment number.
In the upper right hand corner, the total number of segments is displayed. If you wish to reduce
the number of segments in the transient you may enter the last segment number there, then you
must press STORE to save the transient.
T (Segment time): Enter a time from 0.0002 to 300 seconds for a time-base transient.
If cycle-based transients are desired, entering 0 in the first segment will make the transient a
cycle-based transient. The display will then show "1 CYCLE". The time for each segment will
then be 1 period of the output waveform. This is useful for switching in different waveforms on a
cycle by cycle basis for sub-cycle transients.
Va, Vb, Vc: Line to neutral voltages are entered for 1Φ and 3Φ Forms. Line to Line
voltages are entered for 2Φ operation.
Direct-Coupled output = 0 to 150 Vrms in steps of 0.1 volts
Transformer-coupled output = 0 to 375 Vrms in steps of 0.5 volts (if XFMR Ratio is 2.5)
FREQ: Any desired output frequency from 15.00 to 1200 Hz. may be entered.
RANGE RESOLUTION
15.00 - 99.99 Hz. 0.01 Hz.
100.0 - 999.9 Hz. 0.1 Hz.
1000 – 1200 Hz. 1 Hz.
WFa, WFb, WFc: Select the desired output waveform. Waveform 1 is always a sine wave.
Waveform 2-22 may be copied and/or edited as desired using the SETUP (fn)
functions.
Depending on the TRANSIENT WFs setting (see page 48), the UPC may attempt to generate
the selected waveform at the rms voltage programmed at the beginning of each segment.
Because of the difference in the rms voltage content of various waveforms, the UPC may not be
able to reproduce the waveform at the voltage desired. If the waveform is peak-voltage-limiting,
then selecting transformer coupled output with a higher ratio may solve this problem.
TRANSIENT EVENTS: Enter the number of times you wish the transient to repeat. 0 causes the
transient to repeat continuously, until the TRANS key is pressed again.
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