4.20-10 Section 4: Using the Model 9100: AC Power Function - Operation
Final Width = 215mm
4.20.4 Value Editing
4.20.4.1 Amplitude Editing
Output values can be changed using ‘Digit’ and ‘Direct’ edit facilities as described in
Section 3.
Note that as a general rule, editing any value will cause the Power to change. Editing
Power causes only the voltage to change. Changing from one waveform to another retains
Phase, RMS Volts and Current, thus making Power the varying field.
Editing Power – The output power can be defined by directly entering it into the Power
field (in which case the voltage will be recalculated automatically, based on the present
current and phase setting), or the output power can be defined by entering the voltage,
current and phase into their respective fields (see below).
For example:
If V=10 and I=1.
An Output Value of 10W thus set on the display, when increased to 11W
will result in V being recalculated as 11V.
Editing the Main channel amplitude, varies only the voltage source.
Editing of the Auxiliary channel amplitude normally varies the current source, but its
operating mode can be modified to provide an auxiliary voltage source (although still
displayed as a current), or to allow the selection of current coils that boost the effective
current output as described in Section 4.20.3.
Editing Ø causes Power and VAR to be recalculated, but not VA.
4.20.4.2 Frequency and Phase Editing
Frequency and Internal Phase-Shift (Ø) values can be changed using ‘Digit’ and ‘Direct’
edit facilities. The general rules for editing processes are described in Section 3. (Note that
as Ø angle increases, specifications tend to worsen. For this reason, most calibrations are
performed at low phase angles.) Altering phase causes Power and VARs to be
recalculated.
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