After applying power to either the sensor/transmitter or receiver, wait a minimum of 10 seconds for the power up sequence to complete. During this time there will be one or more LED blinks before the unit is ready for operation.
Low Battery Indication (Sensor/Transmitter):
The receiver LED will flash red twice every 3 seconds to indicate a low or discharged battery. This battery status update will occur only during flow conditions. The sensor/transmitter will operate for a minimum of 2 years on a D cell lithium battery and 6 months on the AA alkaline battery pack.
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