Raymarine instruments not always booting up properly

[SimonFa]

I have a Raymarine ST60 wind, ST60 tridata and GPS RN300.

When I turn the instruments on I rarely get log and true wind speed first time. I sometimes have to turn them on 4 or 5 times and that doesn't always work. I've had to set off without them a couple times to meet the Weymouth bridge and find that they just have been known to come on after a period of time.

The doesn't appear to be any rhyme nor reason to when the do work: anyone got any thoughts?

Thanks in advance,

Simon

 

[ParaHandy]

Without boat speed you won't get true wind speed. I can't remember what mine does if the log impeller is out but I think the rest of the Raymarine stuff assumes zero.

The initial log failure could be the impeller needs a thorough clean. Mine can be slow to start as well.

 

[earlybird]

As above, if paddlewheel is fouled, log will read 0.0, but you should get apparent wind-speed and direction.
If this isn't the problem, I'd first try giving all the plugs at the back of the displays a wiggle to improve contact.

 

[SimonFa]

As above, if paddlewheel is fouled, log will read 0.0, but you should get apparent wind-speed and direction.
If this isn't the problem, I'd first try giving all the plugs at the back of the displays a wiggle to improve contact.

It's not that it reads "0.0", I've had a fouled impeller and got that; at boot up I get "-.-" and no total log.

Simon

 

[earlybird]

It's not that it reads "0.0", I've had a fouled impeller and got that; at boot up I get "-.-" and no total log.

Simon

Is the temperature reading a sensible one?
If not, it suggests that the thermistor in the paddlewheel is dodgy. In that case, the instrument might be powering up in slave mode, hence the "---"
A test for that is to put a resistor of about 10kohm across the display terminals that normally take the brown and white transducer wires, which restores "master" mode.
That's how mine works. Dealt with in Raymarine FAQ's.
Hope that helps.

 

[SimonFa]

Is the temperature reading a sensible one?
If not, it suggests that the thermistor in the paddlewheel is dodgy. In that case, the instrument might be powering up in slave mode, hence the "---"
A test for that is to put a resistor of about 10kohm across the display terminals that normally take the brown and white transducer wires, which restores "master" mode.
That's how mine works. Dealt with in Raymarine FAQ's.
Hope that helps.

From memory the temp reading is way out. I put that down to a need to calibrate but it sounds like a fault. I'll be ordering a 10k resistor today so I can check it at the weekend.

Thanks.
Simon

 

[heard28]

I have an ST60 plus RN300 setup. My ST instruments usually seem to work first time from switch-on, but the RN300 is a real pain. Slow to get a fix, and sometimes just does not get round to calculating and displaying SOG/COG. Restarting it (sometimes more than once) usually cures it. Then it just loses fix from time to time... Seems to be a known RN300 problem (basically its internal CPU is just not man enough to do the sums needed) but it means that anything that depends on SOG/COG on the SeaTalk bus is not going to work either - like true wind speed? I don't have wind instruments so cannot check, but seems plausible.

I am currently awaiting delivery of a cheap GPS unit with NMEA output to plug into the RN300 and bypass its problems entirely.

 

[SimonFa]

Is the temperature reading a sensible one?
If not, it suggests that the thermistor in the paddlewheel is dodgy. In that case, the instrument might be powering up in slave mode, hence the "---"
A test for that is to put a resistor of about 10kohm across the display terminals that normally take the brown and white transducer wires, which restores "master" mode.
That's how mine works. Dealt with in Raymarine FAQ's.
Hope that helps.

That's fixed it, thanks.

Simon