SATEC RDM172 Manual - Manual (Page 33)

Chapter 3 Display Operations Data Display
Series PM172 Powermeters 33
numeric LED display shows up to three parameters at a time. Small
rectangular or triangular LEDs at right and below the display indicate the
displayed parameters and their measurement units.
The display layout may change depending on the meter type and mode of
operation. There are three modes of display operation: data display, status
display, and programming mode display.
Load Bar Graph
The load bar graph displays the amount, in percent (40% to 110%), of the
present current load with respect to user-defined nominal load current. The
reference nominal current can be set up in amps through the Display Setup
menu. If it is set to 0 (default), the current load is referenced to the specified
CT primary current.
Energy Pulse LED
The PM172E and PM172EH have 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 secondary units. 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
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 or Profibus 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
The PM172 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
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.