User Manual
AMETEK Programmable Power
BPS Series
98
When selecting this trigger source, the field below the TRIG
SOURCE field changed to “TRIG PHASE =“. Use this field to enter
the desired voltage phase angle to trigger the measurement on.
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 5-25 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 5-25: SET VOLT Trigger Source Acquisition
