AIRMAR DST200/800 NMEA2000 transducer seawater temperature issues

[vas]

hello,

it's reasonably documented that these sensors are carp (as far as the Temp part is concerned)
indeed depth and water speed work fine now for 5yrs, temp stopped working a couple of years ago.
Boat after two years is on the hard since yesterday morning.
Today I realised that temp works
and apparently its 40-45C when inside the lower helm temp is now 25C ...

just wondering if anyone got something similar!

For the record, I'm planning on installing a separate water temp sensor anyway (discussed it in another thread in PBO a few months back)

cheers

V.

 

[bitbaltic]

Mine has been telling me the Bristol Channel is 25 degrees C since it was fitted. I like its optimism.

 

[vas]

Mine has been telling me the Bristol Channel is 25 degrees C since it was fitted. I like its optimism.

you are aware that you can shift the values up or down in your case through another device in the N2K bus I hope.
Or a device in the bus is configured with a +10C...

 

[SteveHud]

I've just come aboat a boat north of Gothenburg, and the Airmar DST200 reckons the water is 45°C.
Took a morning dip this morning, can confirm this isn't accurate.
There's a temperature offset, but it's already on the maximum, -9.9°C
Has anyone else found a way to sure this problem?

 

[vas]

I've just come aboat a boat north of Gothenburg, and the Airmar DST200 reckons the water is 45°C.
Took a morning dip this morning, can confirm this isn't accurate.
There's a temperature offset, but it's already on the maximum, -9.9°C
Has anyone else found a way to sure this problem?

only solution (for a few years at least...) is to replace the transducer.

 

[[70521]]

Has anybody tested the water temperature with a thermometer and compared it with the through hull?

 

[ithet]

The thermistors in these transducers fail after a few years and then they usually read a fixed temperature of about 45deg C. It is supposedly possible to get a reading by wiring in a separate thermistor that is epoxied to the hull.

 

[vas]

The thermistors in these transducers fail after a few years and then they usually read a fixed temperature of about 45deg C. It is supposedly possible to get a reading by wiring in a separate thermistor that is epoxied to the hull.

mine shows such a fixed temp when on the hard.
In the water I get no reading at all, just blank.

Curious how one would go about opening the N2K version one finding the wires to the thermistor and replacing them with an external one or whatever. Any pointers on how it's done would be appreciated.

cheers

V.

 

[Lucky Duck]

Mine went years ago but that information is not particularly accessible on my set up.

More of a concern is the depth bit is becoming increasingly erratic.

 

[Neeves]

Temperature sensors are commonly a bit redundant, just sticking you hand in the water.

However if you are avoiding hot or cold, relatively speaking, currents, the data is critical

We have a warm current flowing from the tropical north to the cooler south of Australia, imaginatively called

The East Australian Current,

It flows from North to South and you want to be in the current, or not, depending on whether you are moving north or south. The current can flow at 5 knots.

Jonathan