question

alnavasa avatar image
alnavasa asked

GX thermometer calibration offset.

Hi,

I have two thermometers ducted to two batteries.

First question, can I hop one to the positive and the other one to the negative? this are isolated right? (Would do that due to space arrangement)


Second question, one battery is always 3ºC higher than the other one, that couldn't be aleatory, my guess is that one of the sensor reads higher. Is there any way to calibrate this on the Cerbo GX


Thermostats are located at the side of the batteries, marked with a cross, would like to put them on the most outer posts of the batteries (circle)


Also would like to calibrate them properly.




Temp sensors are: ASS000001000

PS: thinking on fitting one thermostat on a fridge, are this water proof


VRMVenus GX - VGX
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2 Answers
wkirby avatar image
wkirby answered ·

@alnavasa It is because you do not have superuser access.
You can set superuser access:
https://www.victronenergy.com/live/ccgx:root_access#set_access_level_to_superuser

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klim8skeptic avatar image klim8skeptic ♦ commented ·

OP might want to mention which firmware version they are using..

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alnavasa avatar image alnavasa commented ·

Finally! thanks!!! that was it!, now I need a precise thermometer to do a precise calibration of the sensor.
Thanks!

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wkirby avatar image
wkirby answered ·

The temperature sensors which are used with the GX (ASS000001000) are isolated from the tag.
You can calibrate any offset in the temperature sensor menu on the GX.

As a sidenote the temperature sensor which works with the BMV / Smart Shunt (ASS000100000) is NOT isolated and must always connect to the positive terminal.

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alnavasa avatar image alnavasa commented ·

can you guide me through the menu to how to calibrate the temperature sensor, I can't find it, It looks like it has being pulled of the menu the option to calibrate them.

Are this sensors waterproof (to be used inside the fridge)

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wkirby avatar image wkirby ♦♦ alnavasa commented ·

As an example, from Device List -> Generic Temperature Sensor -> Setup -> Offset


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marekp avatar image marekp wkirby ♦♦ commented ·

What if the temperature sensor is not showing on the device list?

Temperature sensor is connected and VRM shows the temperature.

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wkirby avatar image wkirby ♦♦ marekp commented ·

Do you have thenm switched on in the Analog Inputs menu?

Settings -> I/O -> Analog Inputs


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marekp avatar image marekp wkirby ♦♦ commented ·

Do not have sub-menu I/O w menu settings.

My temp sensor is connected to EasySolar-II GX, and in VRM I can see temperature measurement.

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wkirby avatar image wkirby ♦♦ marekp commented ·

Sorry Marek, I thought you also have a Cerbo like the original poster.
EasySolarGX does not have temperature sensor on the GX.
Your temperature sensor is connected to the Inverter / Charger section of the EasySolar as a VE.Bus sensor, not a sensor in the GX section. That is why it is not available in the menus of the GX, there are no configuration options for this.
This is shown in VRM as a temperature sensor under the VE.Bus System.

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alnavasa avatar image alnavasa wkirby ♦♦ commented ·

Nope, Not there,

Looks like it has being removed from the OS? could that be?





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