Modbus sensor // Adjust values settings

Hi all,

I’m newbie on forum … I’m looking for a answer but I didn’t find anythings … I hope someone can help me …
I built a modbus sensor, everithings work fine, I can read the value but I need to complete certain tasks to get the correct value in ° C

i.e.
I read the value from modbus sensor (2918)
In a bargraph (other sistems scada) I put the following value for get the right temperature in °C

Units

°C
Min Value = -273
Max Value = 136.5

Scale

Ratio = 0.1
Bias = -273

Someone can help me please?

Thanks.