Multi-Tech Systems 7500 - Manual (Page 24)

Display Screen Types ION 7500 / ION 7600 User’s Guide
Page 24 Chapter 2 - Using The Front Panel
Automatic Units
The front panel automatically scales the units for basic measurements, such as
voltage, current and power parameters. For example, a measurement of 2,000
Watts is displayed as 2.000 kW. A measurement of 2,000,000 Watts is displayed as
2.000 MW. The meter makes these conversions using your PT and CT ratios.
The meter only performs these automatic units if the measurement is derived
solely from the Power Meter module’s output.
Phasor Diagram Displays
Phase information can be displayed in phasor diagram format. Phasor diagrams
are accompanied by tables that state the angle and magnitude of each phasor.
In cases where phasors are too small to be represented graphically, they are only
shown as table entries.
Event Log Displays
Event Log displays alert you to recent events written to the meter’s event log. The
vertical (Up/Down) navigation buttons are used to move through the list.
Details on altering the meter’s Event Log characteristics, such as log depth and
logging frequency, using Designer can be found in the "Default Functionality"
chapter.
Nameplate Displays
Like Event Log displays, Nameplate displays show information in tabular format.
Default nameplates show owner, meter, and power system details.
See the section "Time-Of-Use Configuration" in the Default Meter Functionality
chapter for details on configuring the T
AG strings.
Histogram Displays
Harmonics content is displayed in histogram format. Harmonics are displayed
from the 2
nd
to the 63
rd
harmonic, with Total Harmonic Distortion (THD) values
displayed above the histogram (K Factor and Crest Factor only appear in current
harmonic histograms).
Use the vertical navigation buttons on the meter front panel to select individual
harmonics (from 2
nd
to 40
th
) in the histogram and view data specific to each of
them (V
1
, V
2
, V
3
, I
1
, I
2
, and I
3
only).
An arrow appears below the harmonic selected. Harmonic magnitude is
displayed as an absolute value and as a percentage of the fundamental. The phase
angle of each harmonic is also provided. To return to the THD values, position the
arrow below the fundamental.