Temperature sensor calibration

[SoakedUp]

Has anyone else had issues with the victron temp sensors for the multiplus or cerbo gx devices. Seems like the two sensors I got both read about 8-10 degrees warmer than every other temp sensor I have. Is there a way to Calibrate these sensors? In a room that is 80F with three other temp sensors, the victron sensor reads closer to 90F. I also have a small dorm fridge with a fridge temp reader in it. Again the victron reads about 48-50F where the fridge thermometer reads ~40F.

 

[HRTKD]

I have three temperature sensors on one of my LiFePO4 batteries. One of those is for the BMV-712. All three temperature sensors report within .5°F of each other.

I have two temperature sensors connected to my Cerbo GX. They are located within about 18" of each other and report similar temperatures, but I don't think I've ever checked them against the temperature sensors on the battery.

Here's a post from the Victron Community that talks about how to calibrate the temperature sensors:

GX thermometer calibration offset. - Victron Community

community.victronenergy.com

 

[sunshine_eggo]

I have three temperature sensors on one of my LiFePO4 batteries. One of those is for the BMV-712. All three temperature sensors report within .5°F of each other.

I have two temperature sensors connected to my Cerbo GX. They are located within about 18" of each other and report similar temperatures, but I don't think I've ever checked them against the temperature sensors on the battery.

Here's a post from the Victron Community that talks about how to calibrate the temperature sensors:

GX thermometer calibration offset. - Victron Community

community.victronenergy.com

I believe that's only for temperature sensors connected to the Cerbo. I know of no way to calibrate shunt or inverter temp sensors.

It is important that they be installed as intended. Having a terminal sensor sitting in free air vs. attached to the battery terminal may influence readings.

I have:

BMV-702 sensor on (+) terminal
Quattro sensors x2 on (-) terminal
SBS stuck to side of battery
Batrium BMS sensors x3

That's a total of 7 sensors, and I'm not horribly confident in any of them. I'm just hopeful that they're somewhere in that range:



3°C variation between BMS, BMV and Quattros. at about 5pm today:

Right now:



6°C variation. That has more to do with the fact that the Battery Monitor (Batrium) sensors are stuck to cells with insulating foam shielding them, and the BMV/Quattro sensors are on the terminals connected to Aluminum with a lot of surface area for cooling than it is an actual error.