RLE Technologies LD5100, User Manual

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1.1. Description
The LD5100 is a complete monitoring system that detects and reports the presence of water
and other conductive liquids. The LD5100 couples SeaHawk Water Leak Detection Cable
(SC) with an advanced control panel. Each LD5100 monitors up to 5000 feet (1,524m) of SC
cable. When a conductive liquid comes in contact with the SC cable an alarm sounds and the
distance to the leak is shown on the LD5100's LCD front panel display.
The LD5100 allows a single person to perform the mapping of the cable - the process of
determining the relationship between a known point along the cable and the value as measured
by the LD5100.
1.2. Operation
When the LD5100's analog circuitry measures a current in excess of the user-defined leak
threshold, the unit's microprocessor computes the distance to the leak. The unit then
annunciates the leak and logs the alarm in its event log. The leak relay and fault relay each
have two outputs. An additional 4-20mA output allows the device to interface with third party
management systems.
The LD5100 is a supervised system - it constantly monitors the cable for continuity. A cable
break or excess contamination of the cable causes a cable break indication and activates a
relay. The LD5100 sends alarm notifications to predetermined recipients when an alarm
sounds. The LD5100 produces an alarm in the following conditions:

Leak Detected

Cable Break (or Cable Fault)

Cable Contamination

Loss of Communications