Chapter 3 Using Front Display Display Operations
60 PM135 Powermeter Series
Energy Pulse LED
The PM135E and PM135EH 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 mode: the LED pulses indicate imported Wh at a rate
of 1,000 pulses per kWh
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 Device Options setup.
When in test mode, the energy and demand accumulators do not account
for consumed energy.
Port Activity LEDs
The meter has two green LEDs “RX” and “TX”, which indicate activity on
the COM1 communication port. The LEDs flash when the port is receiving
or transmitting data.
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