Making Measurements
Using the Measurement Functions
3
adj110f.eps
Conversion Menu
Select the conversion algorithm to be applied. This characteristic cannot be modified via
the
Edit capability. A measurement annunciator in the left-hand display indicates the
active conversion algorithm.
This algorithm converts resistance to temperature according to the ITS-90
specifications for SPRTs. For details see the NIST Technical Note 1265,
Guidelines for Realizing the International Temperature Scale of 1990. The
user-defined parameters for the ITS-90 conversion include two subranges
which are entered in subsequent conversion specific menus.
This algorithm converts resistance to temperature using the Callende
-Van
Dusen equations. The user-defined parameters are supplied in the
Alpha(α), Delta(δ), and Beta(β) format and are entered in subsequent
conversion specific menus.
This algorithm converts resistance to temperature using the Callende
-Van
Dusen equations. The user-defined parameters are supplied A, B, C
coefficients and are entered in subsequent conversion specific menus.
Note
The coefficients Alpha(
α
), Delta(
δ
), Beta(
β
) and A, B, C
belong to reciprocally related polynomial expressions. Either
may be used according to preference or available data.
This algorithm converts resistance to temperature using the Callende
-Van
Dusen equations. The only user-defined parameter is the R
0
value entered
in a subsequent conversion specific menu. The other coefficients are
defaulted to A = 3.9083E-3, B = -5.775E-7, C = -4.183E-12.
Coefficient Entry for a New PROBE
On selection of a conversion method the algorithm specific coefficients are set to default
values. The subsequent menus to modify these coefficients are conversion specific. The
default value for the coefficient may be entered with a labeled softkey.
adj111f.eps
Coefficient Menus
3-27
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