Compute Delta; Compute R0 And Alpha - Fluke 9133 User Manual

9133
User's Guide
9.2.1
9.2.2
36

Compute DELTA

= −
A T T
4 3
= −
B T T
3 2
⎡ ⎤ ⎡ ⎤
T T
= −
4 4
C 1
⎣ ⎢ ⎦ ⎥ ⎣ ⎢ ⎦ ⎥
100 100
⎡ ⎤ ⎡ ⎤
T T
= −
3 3
D 1
⎣ ⎢ ⎦ ⎥ ⎣ ⎢ ⎦ ⎥
100 100
= −
E R R
4 3
= −
F R R
3 2
−
AF BE
=
delta
−
DE CF
T - Measured temperature using the reference thermometer
1– 4
R - Value of R from the 9133 display (Press SET and DOWN at the same
1– 4
time)
Where
T and R are the measured temperature and resistance at –25°C
1 1
T and R are the measured temperature and resistance at 0°C
2 2
T and R are the measured temperature and resistance at 60°C
3 3
T and R are the measured temperature and resistance at 125°C
4 4

Compute R0 and ALPHA

⎡
T
= +
2
a T delta
⎣ ⎢
1 2
100
⎡
T
= +
4
a T delta
⎣ ⎢
3 4
100
−
R a R a
=
4 1 2 3
rzero
−
a a
1 3
−
R R
=
2 4
alpha
−
R a R a
4 1 2 3
delta is the new value of DELTA computed above.
⎡ ⎤ ⎡ ⎤
T T
− −
3 3
1
⎣ ⎢ ⎦ ⎥ ⎣ ⎢ 100 ⎥
⎦
100
⎡ ⎤ ⎡ ⎤
T T
− −
2 2
1
⎣ ⎢ ⎦ ⎥ ⎣ ⎢ 100 ⎥
⎦
100
⎤ ⎡ ⎤
T
−
2
1
⎦ ⎥ ⎣ ⎢ ⎦ ⎥
100
⎤ ⎡ ⎤
T
−
4
1
⎦ ⎥ ⎣ ⎢ ⎦ ⎥
100