SATEC PM175 Manual - Manual (Page 33)

‎Chapter 3 Display Operations Data Display
Series PM175 Powermeters 33
Energy Pulse LED
The PM175 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
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
The PM175 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.
 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.