User Manual AMETEK Programmable Power
RS Series 118
This mode is appropriate when capturing analyzing events at a
specific phase angle such as the zero crossing of the voltage.
Note that the phase angle of the current with respect to the
voltage is determined by the load, so triggering at a specific
phase current angle is not possible as it is not controlled by the
AC source. However, when capturing current waveform data,
the phase relationship to the voltage can be determined easily
by triggering at the 0° point on the voltage.
Voltage step (SET VOLT) This mode performs two functions. It programs the output
voltage for the selected phase or phases to the rms or DC value
specified and it triggers the measurement acquisition at the
same moment in time.
When selecting this trigger source, the field below the TRIG
SOURCE field changed to “SET VOLT =“. Use this field to enter
the desired voltage to program the output to and trigger the
measurement on. If only one phase in a three phase system is
selected, only that phase’s output will be programmed. If all
phases are selected, all three phases’ outputs will be
programmed. Use the PHASE key to select the desired phase
or all phases. Figure 4-36 shows an example of using the SET
VOLT trigger source to capture the turn-on of the voltage. In this
case, a negative trigger delay was specified and the voltage
start phase angle was set to 90° in the PROGRAM 2 screen.
TRIGGER
DELAY
ACQUISITION WINDOW
TRIGGER =
SET VOLT 120
START
[ENTER]
Figure 4-36: SET VOLT Trigger Source Acquisition
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