DIYbanter - View Single Post

Roger Mills

In an earlier contribution to this discussion,
wrote:

Roger Mills wrote:
In an earlier contribution to this discussion,

I fear that we're getting into semantics! Yes, the accelerator
resistor reduces the hysteresis rather than the overshoot per se -
but the effect is very similar. By switching off *before* the set
temperature is reached, the likelihood of overshooting the set
temperature is reduced.

But it doesnt do that. The hysteresis means it overshoots its set
point every time. Not by enough to cause a problem.

It doesn't do what? Are you saying that it doesn't switch off before the set
temperature is reached? Clearly it does! The innards will have reached the
set temperature because of the effect of the accelerator resistor, but the
surrounding air will be at a lower temperature - giving scope for the
thermal inertia in the rads to raise the room temperature a bit more without
overshooting the *true* set temperature.
--
Cheers,
Roger
______
Email address maintained for newsgroup use only, and not regularly
monitored.. Messages sent to it may not be read for several weeks.
PLEASE REPLY TO NEWSGROUP!