The amount of conditioning required by
a thermocouple will depend on its temperature measuring range (see Table 8.6).
Its accuracy is 1 to 2 percent over a limited temperature range but needs conditioning
(linearizing) if used over its full operating range. The set zero conditioning
is a part of the reference temperature correction. Thermocouple voltages
can also be sensed directly by the controller using an internal amplifier and then
conditioned internally; this is discussed in Chap. 13.