
RM-804 & RM-805 Instruction Manual/English
64
13/10/2016 Version No. 001
measured. T
A
can either by manually measured with the PT-100
sensor or it can be manually set.
(
△
T) Extrapolated temperature difference = T - T
A
**“Constant” setting on the panel display is equivalent to the
absolute value of the inferred zero resistance temperature.
Common
inferred zero
resistance
temperatures
Metallic conductors show increased resistivity when temperature
is increased, and likewise show reduced resistivity when
temperature is reduced. Inferred zero resistance temperature is
simply the inferred temperature at which the material will have no
resistance. This value is derived from the temperature coefficient
of the material.
Note
The inferred zero resistance temperature is an ideal value, and
not a real-world value.
Material
Inferred Absolute Temperatures
Silver
-243
Copper
-234.5
Gold
-274
Aluminium
-236
Tungsten
-204
Nickel
-147
Iron
-162
1. Select the
Press TCONV to access the temperature compensation function.
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