FBXXX Field Temperature Blocks
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5.2.4.1.1.3.2 TYPE (CVD)
The CVD (Callendar-Van Dusen) conversion is for RTD probes that use the Callendar-
Van Dusen equation:
The parameters that appear when CVD is selected are “Serial” (Serial Number),
“Cal Date”, “R0”, “ALPHA”, “DELTA” and “BETA”, which can be set by the user.
For IEC-751, DIN-43760 or ASTM E1137 sensors, the coefcients for R0, ALPHA,
DELTA, and BETA are 100.0, 0.00385055, 1.4998, and 0.1086 respectively.
Some probes may be provided with A, B, and C coefcients for the Callendar-Van
Dusen equation in the following form:
The A, B, and C coefcients can be converted to Alpha, Beta and Delta coefcients
using the following equation:
5.2.4.1.1.3.2.1 PROG PROBE
The PROG PROBE parameter is used to tell the instrument to program a Smart Lemo
with the appropriate probe coefcients. Use the arrow keys to select “Yes” or “No”.
If “Yes” is selected, the Smart Lemo will be programmed with the appropriate coef-
cients for the selected conversion type. For ITS-90 and CVD the coefcient values
need to entered before programming the Smart Lemo. For IEC-60751 and Resistance,
no values are required to program the Smart Lemo.
5.2.4.1.1.3.3 TYPE (IEC-60751)
The IEC-60751 conversion is for RTD probes that use the International Electrotechni-
cal Commission (IEC) Standard Publication 751.
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