I have made myself two temperature probes out of LM355 sensors. When I connect to Venus GX the message "Reversed polarity" is displayed and there is no temperature reading. If I change the polarity on the terminal on the Venus GX the message "Not connected" is displayed. Any experience or help on this issue?
I have one sensor attached to the generator in my boat and the other one on the hot water boiler. Just for monitoring in my boat.
Some sites give the wrong pinout.
I used this. Adjust/1 not connected. I dont understand why my GX either says reversed polarity or "not connected" if I try to fix the polariry.
Ok so heres a weird one! Hopefully someone can help as I'm loosing my will lol.
I have my temperature reading on vx no problem but...... as temp up the reading on vx goes down and if I cool the sensor the reading on vx goes up??? If i swap the terminals around I get either the disconnected or reverse polarity or unknown message.
Any help ideas greatly appreciated
Thanks
I have the same problem. reverse polarity or not connected message. I have tried both pinouts can't make it work any way.
Just check that you are using an LM335 sensor. The pinout I posted above is correct.
You only need to connect the + and - pins to the venus/cerbo. Apparently you can change any temp offset via settings within venus/cerbo remote console (setup).
Good luck.
i cant get any where with lm335 . Ijust bought an expensive vctron temperature sensor to se if i can make it work
Here is a picture of my remote GX console stating "Reverse polarity" for both sensors.
It worked! Klim8sceptic's pinout is correct!
Seeing that you guys have experience with the temperature sensors on the VGX, I was wondering if you would be able to help me:
I'm thinking of controlling my 12V hot water heater by my VGX. I'll use one of the temperature inputs to read the temperature of the water, and then use Relay1 or 2 to switch the heater on and off.
Would this be possible?
Can I configure the relay to see the temperature input but also only start the heater if the SOC (state of charge) of the battery is higher than a certain value?
Thanx!
Philip
Which sensor victron uses? There are different LM335 sensors. The DZ calibrated in Celsius and LM335Z calibrated in kelvin. Ant there are other differences. Does anybody know which sensor is in the Original Victron sensor? (Which obviously is too expensive)
Bought original LM335 (digikey) sensor, still no output its reverse polarity or 4.98v and no value. Do i need to put a resistor between the signal. Cant open the Victron sensors. (Have 2 working). Any ideas? I bought 3 different LM335,s so going the Victron sensor route is maybe better.
This is a picture of the last sensor. Clearly my pinout is different as i used the datasheet, will try to change pinout first.
Pinout was strangely enough, wrong on the datasheet of the ST semiconductor LM355, if you use the picture above. I use the 2 most right leads. Sensor works great now.
