HP 6811B User Manual page 9

Using the Front Panel Display with the Power Analyzer Input
To select the measurement source:
Action
Press Meter to return the display to Meter mode. Press Phase Select at any time to
toggle between the Main Output and the Power Analyzer input. The left-most digit of
the front panel display will indicate either "φ1" for the Main Output, or "φ2" for the
Power Analyzer input. If the φ2 front panel display returns a very high frequency
value, it usually means that there is no signal connected to the Power Analyzer input.
Note that the Phase Select key also selects the measurement source to which the
current range setting applies. The current range command is located in the Input menu.
Making Power Analyzer Input Measurements
All measurements are based on acquiring and subsequently processing waveform information. Waveform
information is acquired either from the ac source output or from the Power Analyzer input. When the ac
source is on, it continually takes measurements and updates the front panel meter from whichever
measurement source is active. The Meter key accesses the measurement functions from the front panel.
This menu applies to both the ac source output and the Power Analyzer input.
NOTE: The Shift Harmonic functions also apply to the Power Analyzer input.
If the display indicates OVLD, the measurement capability of the unit has been
exceeded.
Use the Meter menu for making Power Analyzer input measurements:
Action
Press Phase Select to toggle to the Power Analyzer input. A φ2 will appear
1.
on the display when the Power Analyzer input is selected.
2. Press Meter and
♦
rms voltage and frequency (the default)
♦
rms voltage and rms current
♦
rms current and frequency (the default)
♦
rms voltage and power
♦
current crest factor
♦
peak current, repetitive
♦
peak current, non-repetitive
♦
apparent power
♦
reactive power
♦
power factor
The ac source uses the output frequency value when calculating many of the output measurements. For ac
source output measurements, the ac source uses the programmed output frequency value. For the Power
Analyzer input , the ac source uses the frequency measured at the V SENSE input channel. This is the
default setting. You can also select the I SENSE input channel as the frequency measurement source.
Use the Input menu for selecting the frequency source:
Action
If a voltage signal is not available to measure the output frequency, you must
select the current measurement as the frequency source. Press Input, scroll to
FREQ:SRC VOLT, select the CURR parameter and press Enter.
repeatedly to access the following measurement functions:
Display
φ
2
115V 60Hz
Display
φ
2
115V 3.04A
φ
2
<reading>V <reading>Hz
φ
2
<reading>V <reading>A
φ
2
<reading>A <reading>Hz
φ
2
<reading>V <reading>W
φ
2
<reading> CREST F
φ
2
<reading>A PK REP
φ
2
<reading>A PK NR
φ
2
<reading> VA
φ
2
<reading> VAR
φ
2
<reading> PFACTOR
Display
FREQ:SRC CURR
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