Step Or Ramp Modes - Pacific Power Source LMX Series Operation Manual

6.7.7

STEP or RAMP Modes

STEP and RAMP transients are very similar except in RAMP data entry mode, each step
duration is set to the minimum available time interval of 0.1 msec to obtain the smoothest
possible ramp result.
In STEP mode, the user sets each increment/decrement and step dwell time.
Step transients are useful for testing over or under voltage protection circuits on AC input
supplies. They allow Voltage, Frequency and phase B or C to be steps at discrete intervals
and times. An example STEP transient is shown in the screen capture below. It shows the
relationship between the RAMP Parameters.
The LENGTH is the dwell time for each step level, including any ramp time. The first step
starts from the INITIAL VALUE. The DELTA is the increment or decrement value for each
step. The FINAL VALUE determines how many steps will be required to reach it.
Thus, the step COUNT will be:
COUNT = (FINAL VALUE – INITIAL VALUE) / DELTA
The total duration to complete the STEP transient depends on the repeat setting, length and
if the Insert Intial Value check box is ON or OFF:
If Insert Initial Value = ON (default):
DURATION = REPEAT TIMES * (COUNT + 1) * LENGTH
If Insert Initial Value = OFF:
DURATION = REPEAT TIMES * COUNT * LENGTH
Step Transients can be programmed from the front panel or the LXI webserver.
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LMX Series Power Source Operation Manual
LMX SERIES™ OPERATION MANUAL
Front Panel Operation
SECTION 6:
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