2-4 9700 POWER METER USER’S GUIDE
Bar Graph Displays
Three display screens are provided for phase voltage an d current:
♦ High-speed line-to-neutral and average voltage (100 ms upd ate rate)
♦ High-speed phase and average current (100 ms u pdate rate)
♦ Line-to-neutral voltage and phase current (1 second update) with
minimum and maximum indicators.
The two high-speed displays use a four-channel bar graph that shows the
low limit, the parameter name (i.e. Vln a, meaning line-to-neutral voltage
on phase A), and the upper limit above the bar for each measurement.
The high-speed voltage display, called VOLTAGE HS BAR GRAPH, has fixed
limits of 0 to 400 volts. The high-speed current display, called CURRENT HS
BAR GRAPH, has fixed limits of 0 to 6000 Amps. If your voltage or current
values are above the fixed upper limits, the MGT will display OFF SCALE in
place of the bar. Similarly, the voltage bar graph displays OFF SCALE if you
have a Delta power system, as there are no line-to-neut ral voltage values
available.
The phase voltage and current bar graph, called VOLTS/AMPS BAR GRAPH,
displays line-to-neutral phase voltage and phase current valu es. As with
the high-speed bar graphs, voltage limits of 0 to 400 Volts and current
limits of 0 to 6000 Amps are fixed, and line-to-neutral voltages will read OFF
SCALE if viewed in a Delta power system.
The VOLTS/AMPS BAR GRAPH also shows the minimum and maximum values
measured (since power-up or the last min/max reset). Small triangles
located on each parameter’s bar indicate the min/max v alues:
238)
Each of the MGT display
screens can be adjusted to
match your power system.
Refer to “Creating Custom
MGT Displays” in Chapter 4.
The minimum value is
indicated by this triangle.
The maximum value is
indicated by this triangle.