4-18
Nominal Values
Nominal Values
Frequency,
voltage and
current settings
The Nominal Values screen allows you to select frequency synch options, including
channel source (Va, Vd, Ia, Id), speed of response (Standard - Utility Power Line, Fast -
Local Generator or Internal), and frequency sync min/max range.
Action... Result...
STEP 1: Press the Nominal &
Frequency tab or from the Wiring
Config screen, press Next.
Nominal values appear as you
prepare the instrument to record data.
• If the computed nominal values
are acceptable without change,
press the Monitor Mode tab or
press Next. Go to page 4-21.
• To set the parameters to track
frequency of a monitored
system, check the following:
Nominal Values
• To enter a new internal
Frequency, Voltage and/or
Current value, press the
corresponding field and enter a
new value using the numeric
keypad.
NOTE: Always enter a nominal
frequency that matches your line
frequency. This ensures that if
external sync is lost, there will be
a corresponding internal sync.
Profile
This is the tracking rate of the
PLL circuitry to changes in
frequency.
• Standard (Utility Power Line)
is a slow 0.01 Hz per second
rate of change response.
• Fast (Local Generator) is a 0.1
Hz per second rate of change
response.
• Internal uses the nominal
frequency when making
measurements where no
reference signal is available.
NOTE: Make sure that the nominal values
computed by HDPQ Xplorer are correct.
Nominal values are used as basis for setting
default thresholds and other parameters for
circuit monitoring.
HDPQ-412
Shop for Power Metering products online at:
1.877.766.5412
www.PowerMeterStore.com
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