20
Problem:
Temperatures do not match if
units are placed next to each other.
Solution:
Each temperature sensor is
manufactured to be accurate to within 1
degree plus or minus and under normal
conditions; so two temperature sensors could
be as much as 2 degrees different. However,
the difference can be exaggerated further
because the temperature sensors are
designed for different working
environments. The indoor sensor is less
responsive to ambient air currents because of
the shielding effect of the display's case. In
addition, the case can act as a heat sink to
absorb and store heat from external sources
(i.e. handling of the case or radiant heat). In
addition, the much greater range of the
outdoor temperature sensor requires a
different calibration curve than the indoor
range. Error is usually greater at the extreme
ends of a range, making it harder to compare
different ranges with different curves. Under
non-laboratory conditions, it is difficult to
compensate for the above factors and obtain
an accurate comparison.
