I have purchase an Inkbird ITC-308 Temperature controler , which I connect (via the “heating” plug of the ITC-308 ) to a Biogreen Palma 2.0 electrical heater for heating my greenhouse.
When the Biogreen heater is not activated, the T° measured/shown by the Inkbird ITC-308 is very similar (difference < 1/10th C°) to T° measured by 2 other different sensors (differend brands). The wired probe of the Inkbird ITC-308 is very close (few cm) to the 2 other sensors.
As soon as the electrical heater is activated by the Inkbird ITC-308 (because the “Set T°” has been reached), the T° shown by the Inkbird ITC-308 rise much quicker than the T° shown by the 2 other sensors (T° shown by the 2 other sensors rise much more slowly but remain coherent between them).
It looks like the Inkbird ITC-308 Temperature controler measure/shows an overestimated T°when it activates the heater.
What could be the cause of this problem, and I can I solve it ?