AMETEK i Series - Manual (Page 65)

User Manual
i Series / iX Series 51
DATA MODE Selects absolute or relative harmonics display for TABLE and
BAR view modes. In relative mode, all harmonics are shown in a
percentage of the fundamental which is normalized at 100 %. In
absolute mode, the harmonic amplitudes are shown in absolute
volts or amperes.
This mode does not apply to the TRACE view display mode and
is ignored when this mode is selected.
SCALE Sets the horizontal time axis for the TRACE view display mode.
The field can range from 4 ms to 104 ms in single phase mode
or 12 ms to 312 ms in three phase mode.
This parameter is ignored when the TABLE or BAR view display
mode is selected.
TRIG MODE This field sets the trigger mode for the acquisition. Available
options are SINGLE (single shot acquisition) or CONT
(continuous acquisition). In SINGLE shot mode, the acquisition
is triggered once each time the START field is selected and the
ENTER key is pressed. The selected trigger source is used to
determine the trigger point. Once the acquisition has been
triggered, the data are displayed and do not change until the
next acquisition is triggered. This mode is most appropriate for
single shot events such as start up currents.
In the CONT mode, acquisitions occur repeatedly and the data
is updated on screen after each trigger occurs. This provides a
continuous update of the data and is most appropriate for
repetitive signals.
TRIG SOURCE The trigger source selects the event that will trigger a
measurement acquisition. Available options for this field are
IMM (immediate), PHASE A or SET VOLT. The IMM trigger
source causes the acquisition to trigger immediately when the
ENTER key is pressed on the START field. Essentially, this is
an asynchronous trigger event. The acquisition will always be
triggered in this mode and data is available immediately.
The PHASE A source will cause the acquisition to trigger on the
occurrence of a set phase angle for the voltage on phase A. The
trigger source is always phase A when in this mode, regardless
of the phase selection shown in the top right corner of the
display. When the acquisition is started, the acquisition system
waits for the specified phase angle to occur before triggering the
acquisition. This mode allows exact positioning of the acquisition
data window with respect to the voltage waveform.
The SET VOLT mode causes the acquisition to trigger at the
specified voltage. This mode also programs the selected phase
or all three phases when the measurement is started from the
START field. As such, this trigger source selection also
programs the output voltage to the selected rms level.
TRIG PHASE / SET VOLT This field changes purpose, depending on the trigger source
selected immediately above it. If the trigger source equals IMM
or PHASE A, this field can be used to program the trigger phase
angle (TRIG PHASE). In IMM mode, the value of this field is
ignored.