Fluke 1560 Black Stack - Callendar-Van Dusen Conversion

5.2.1.5 Callendar-Van Dusen Conversion
EDIT SPRT 01
PROBE SER#: 1
CONVERSION: CVD
R0: 100.0
ALPHA: 0.00385
DELTA: 1.507
BETA: 0.111
The following equations are used for the Callendar-Van Dusen conversion:
rt C
Rt
tt
t
R
([ ])°=
+− −
⎛
⎝
⎜
⎞
⎠
⎟
⎡
⎣
⎢
⎤
⎦
⎥
⎧
⎨
⎩
⎫
⎬
⎭
≥
0
0
1
100 100
10αδ
1
100 100
1
100
1
100
3
+− −
⎛
⎝
⎜
⎞
⎠
⎟
−−
⎛
⎝
⎜
⎞
⎠
⎟
⎛
⎝
⎜
⎞
⎠
⎟
⎡
⎣
⎢
αδ βt
tt t t
⎤
⎦
⎥
⎧
⎨
⎪
⎩
⎪
⎫
⎬
⎪
⎭
⎪
≤
⎧
⎨
⎪
⎪
⎩
⎪
⎪
t 0
The user-defined parameters for the Callendar-Van Dusen conversion are R0
(R
0
), ALPHA (α), DELTA (δ), and BETA (β). The defaults are R0: 100.0,
ALPHA: 0.00385055, DELTA: 1.4998, and BETA: 0.109 which are applicable
with DIN-43760 or IEC-751 type RTDs.
Some probes may be provided with A, B, and C coefficients for the
Callendar-Van-Dusen equation in the following form:
()
(
)
[]
rt
RAtB t
RAtBtCt tt
([ ])°=
++ ≥
++ + − ≤
⎧
⎨
⎪
⎩
⎪
C
0
2
0
23
10
1 100 0
The A, B, and C coefficients can be converted to α, δ,andβ coefficients using
the following formulas:
α= +AB100 δ=−
+
100
100
1
A
B
β=−
+
10
100
8
C
AB
1560 Thermometer Readout
User’s Guide
38