ITech IT7900P Series User Manual page 90

Select CP mode
Press [Config] and enter to the configuration menu. Select constant mode to
CP.
Under the config menu interface, the user can select Const Mode item and set
the mode to CP.
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Const Mode: load mode
Unit PF: Unity power factor
On: enable the UPF mode, at this situation, the current waveform changes
with the voltage waveform and this mode causes power factor to be as close
as possible to unity, useful when the input voltage is non-sinusoidal.
Off: disable the UPF mode, at this situation, the current waveform is not
affected by voltage Waveform, and the current waveform is subject to
defined in the config menu, the actual power factor is affected by voltage
Waveform, current Waveform, and phase shift.
Power setting: Constant power value
Current AC Slew Rate: current slope
Waveform (phase shift range: -180.0~180.0): select the waveform. Under
CC mode, and Unit PF is off, Waveform can be select.
Crest Factor: CF range is 1.414~5, and the range is limited by peak value.
Phase shift: Phase shift of voltage and current. Phase shift range within -
180°~180°. If programmed is positive it will be a leading power factor. If
programmed is negative it will be a lagging power factor. This setting serves
the same purpose as the PF value and does the conversion with each other,
which is convenient for the user to set.
Lead/Lag: Lead means the current waveform is ahead of the voltage
waveform, in this case, Phase shift can only be set to negative value, Lag
means the current waveform is lagging behind the voltage waveform, in this
case, Phase shift can only be set to positive value.
Power Factor: It can be set from -1 to 1. The setting range of power factor
is affected by the CF value. This setting has the same function as the Phase
shift value and does the conversion with each other.
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Load mode Operation
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