E-Mon E-PS-A-RTU-N - Manual (Page 33)

Chapter 3 Display
O P E R A T I O N S D A T A D I S P L A Y
PowerSmart+ Advanced Power Quality Meter 33
Energy Pulse LED Energy Pulse LED Energy Pulse LED Energy Pulse LED
The PowerSmart+ Advanced PQM has a red “Energy Pulse” LED. It flashes at a
constant rate when a load is applied to the meter. There are two modes of LED
operation: normal and test. In normal mode, the LED pulses indicate imported Wh at
a rate of 1,000 pulses per kWh. In test mode, the LED pulses indicate either
imported Wh, or imported (inductive) varh at a rate of 10,000 pulses per kWh/kvarh.
The energy test mode can be enabled through the Display Setup menu. When in
test mode, the energy and demand accumulators do not account for consumed
energy.
Port Activity LEDs Port Activity LEDs Port Activity LEDs Port Activity LEDs
The meter has two yellow LEDs “COM1” and “COM2”, which indicate activity on the
two communication ports. The port’s LED flashes when the port is receiving or
transmitting data. With the Ethernet option, the “COM1” LED flashes constantly
regardless of the port activity.
When the display module is connected remotely through a 3-wire RS-485 interface, the
“COM1” LED indicates the display port activity, while the “COM2” LED is not operational.
Navigation Buttons Navigation Buttons Navigation Buttons Navigation Buttons
The PowerSmart+ Advanced PQM is provided with six push buttons that are
normally used to navigate between different measurement displays. In programming
mode, the buttons access the device setup menus and the default factory-set device
settings can be changed.
Data Display
In data mode, the display is normally updated once per second; you can adjust the display
update rate via the Display Setup menu.
Display Features Display Features Display Features Display Features
Measurement Units
Currents are always displayed in amperes with two decimal places.
Measurement units for voltage and power depend on the connection scheme of the
meter:
• When direct wiring is used, voltages are displayed in volts with
one decimal place, and power in kilowatts with three decimal
places.
• When wiring via PT is used, for the PT ratio up to and including
4.0, voltages are displayed in volts, and power in whole kilowatts
• For the PT ratio above 4.0, voltages are displayed in kilovolts,
and power in megawatts with three decimal places.
The small round “Kilo” and “Mega” LEDs light up showing the appropriate
measurement units for a displayed page.
Primary and Secondary Volts
Volts can be displayed in primary (default) or secondary units. The volts display
mode can be changed through the Display Setup menu.