User's Guide

9
User Interface
Permalog® Plus loggers are designed with a battery life span of up to 5* years. To achieve
this the logger will spend most of its operating life in a sleep state. While in this state, all
components in the logger are switched off except for the transceiver mo-dem which is
polled periodically to check for a presence of a Patroller unit.
*Dependant on configuration
The logger is woken from sleep state either by a Patroller unit being detected in range or the
predetermined time to record a sample is reached (default is 2am). When a Pa-troller unit is
detected the unit wakes up and sends it serial number, level & spread, and leak status and
then responds to any commands sent by the Patroller. If the re-cording time is reached then
the logger wakes to record noise levels found on the wa-ter pipe it is magnetically coupled
to. Analyzing these noise levels will cause the logger to switch to one of 3 states:
No Leak Mode:
The logger is in this state when no leak has been detected. If the logger is in Warning mode
and there is a no leak result with the second recording, the logger will change to this mode.
This state is indicted by the LED flashing green and transmitting an “N” through the RF
communications to the Patroller unit to signify no leak.
Warning Mode:
If a leak is detected from the first recording then the logger will change to this mode. During
this mode the logger will perform a second recording an hour later to deter-mine whether to
change to leak or no leak mode.
Leak Mode:
If the logger is in Warning mode and a leak is detected with the second recording then the
logger will change to leak mode.
This state is indicated by the LED flashing Red and the logger transmitting an “L” through
the RF communications to the Patroller unit to signify a leak.
Permalog® Plus — Local Thinking, Global Capabilities