User's Guide

10
User Interface (Continued)
The LED is primarily used to signify whether the logger is in leak or no leak mode. Other
features indicated by the LED are:
1s Low Battery Warning:
Red LED flashes every second.
Logger Reset/Woken:
A short sequence of red and green flashes.
No Illumination:
Logger is asleep or battery failure.
Patroller Communication
Inside each logger is a transceiver module. In normal operation the logger will pole the
transceiver looking for a Patroller unit. When a unit is detected the logger will send its
unique ID (serial number), level & spread values and leak status to verify to the Patroller
that the logger is awake and ready to receive commands.
With the Patroller communicating with the individual logger, any historical data stored on
the logger can be downloaded for analysis and the logger configuration can be changed if
needed.
To save power, a patrol window can be configured in the logger. This means that the logger
will only look for a patroller in a certain time period (e.g. between 8am—8pm). If
communication is required outside this time period then a reset is required to wake the
logger.
Permalog® Plus — Local Thinking, Global Capabilities