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Fluke 9100S - Compute Delta; Compute R0 And Alpha

Fluke 9100S
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9100S Dry-Well Calibrator
Calibration Procedure
38
9.2.1 Compute DELTA
A T T= −
3 2
B T T= −
2 1
C
T T
T T
=
−
−
−
3 3
2 2
100
1
100 100
1
100
D
T T T T
=
−
−
−
2 2 1 1
100
1
100 100
1
100
E R T= −
3 2
F R T= −
2 1
delta
AF BE
DE CF
=
−
−
where:
T
1
and R
1
are the measured temperature and set-point resistance at 50.0 °C
T
2
and R
2
are the measured temperature and set-point resistance at 200.0 °C
T
3
and R
3
are the measured temperature and set-point resistance at 350.0 °C
9.2.2 Compute R0 and ALPHA
a T delta
T T
1 1
1 1
100
1
100
= +
−
a T delta
T T
3 3
3 3
100
1
100
= +
−
rzero
R a R a
a a
=
−
−
3 1 1 3
1 3
alpha
R R
R a R a
=
−
−
1 3
3 1 1 3
delta is the new value of DELTA computed above (Section )
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