on a properly set up tetra heater the coils are NOT supposed to glow at 260C/500F (triple tubo heater will glow very faintly in the dark).
every unit gets calibrated to the exact mod used in the all integrated build so that they supply the displayed temperature 5mm above the internal screen after a warmup cycle. which means the temperatures are accurate at least if you believe my thermocouple (i do
).
if resistance is increased/decreased, the warmup function will be affected. by doing this the general hotness/coldness of the displayed temperature scale is shifted up or downards.
i strongly recommend against messing with the tcr number since this variable influences what 1degreeC on display is in reality. by changing tcr number it will mess up everything. (this is true for all 510 attachments, of course you can find values that work for the particular temp setting you are looking for but they are not making the scale accurate at all).
what are you basing your temperature knowledge on
@oddjobold, are you sure about the accuracy of that device? i suspect every device has their own scale/calibration. also avb on 210c on conduction devices is not 210c on convection devices.
the tetra settings parameters are best not touched since they are calibrated and carefully measured out (tcr) for the all integrated devices from me.
what is totally game is the temperature setting of course.
the heater does need a heat soak to supply the displayed temperature (warmup cycle, 30-60seconds cruise). this can be compensated by using higher temperature setting if wanting to use on demand.
try 235degC on demand and you should be happy.
good moment to reference this write up:
TUBO/TETRA usage patterns