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Raymarine Masthead Wind Transducer Test
01-08-16, 12:17 PM (This post was last modified: 01-10-17 09:20 AM by Chuck - Raymarine - Moderator.)
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Raymarine Masthead Wind Transducer Test
Raymarine Masthead Wind Transducer Test

Before performing the test below, the masthead transducer should be inspected to verify that its cups and/or vane has not been broken. Raymarine has produced two types of transducers for the ST60 Wind Instruments. If cups are shaped like trapezoids, then the part number for the service kit is E28081. If cups are shaped hemispheres, then the part number for the service kit is A27167. The currently manufactured masthead tansducer (shown below) may be serviced with part number A27167:

[Image: wind.jpg]


To perform the check, you will need a multimeter, and a DC power supply. You will need to supply 8v to the masthead across the red and shield connections. Normally the ST50/ST60/i60 display head would be energized and provide this 8V, however in your case, you may need to power the mashead transducer seperately.

With the multimeter, check the following:

Set the multimeter to the 20V DC scale.

Test at the connections on the rear of the display head, or at the base of the mast (if you have a junction box installed.)

- Red to shield should read 8 volts DC steady. This is the masthead power supply, coming from the ST50/ST60 display head. If the head is damaged, you may need to provide this power from another source to test the masthead.

- Blue to Shield should read anywhere between 2 and 6 volts DC. This is the port side directional element. The voltage changes as the vane turns.

- Green to Shield should read anywhere between 2 and 6 volts DC. This is the starboard side directional element.

- Yellow to shield should read between 0 and 5 volts DC. This is the wind speed circuit. The faster the wind is blowing, the higher the voltage will read."

Should the measured voltages be specified above, then the wind instrument should be sent to Raymarine’s Product Repair Center to be bench checked / serviced.

RAYFAQ#
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