Specifications

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3.6 LED flashlight
Covering the LED flasher at the top of the HF antenna, for at least 20 secs, will set it flashing
for 15 cycles (approx. 5 min.). If the LEDs don’t flash, check the connectors and the coaxial
cable below the option port labelled HF. You may also test the HF/LED antenna separately by
applying 7.5 V over the connector at the base, positive voltage on the centre pin connector.
Make sure the current does not exceed the 100 mA limit. If the LEDs still fail the antenna and
may be the electronics unit must be returned to Datawell Service.
3.7 Water temperature sensor
The water temperature sensor is located directly above the mooring eye. This sensor can be
tested by measuring the temperature. While in the water you can use warm and cold water. Out
of the water you can use a heater. A change of temperature shows that the sensor is functional.
Temperature readings are the fastest available when connecting a terminal to the RS232
connector on the electronic unit of the hatchcover and using the status command
(section 5.11). Then the water temperature is displayed directly.
The temperature is updated every minute after buoy start-up. Note that in case of a
DWR-G, a clear view of the sky is required for a buoy start-up.