
TCi Operator Manual
95
If no contact resistance exists at the interface,
)
,
0
(
)
,
0
(
2
1
t
x
T
t
x
T
at all points with
0
x
. For
0
x
equations (7) and (8) are reduced to:
2
1
2
1
1284
.
1
5642
.
0
2
)
,
0
(
e
e
t
G
e
e
t
G
t
x
T
(9)
In the previous section we saw the connection between sensor temperature and resistance. The
resistance change of the sensor is:
)
,
0
(
)
0
(
)
(
)
(
t
x
T
A
t
R
t
R
t
R
(10)
And the voltage change on the sensor is:
)
,
0
(
)
(
)
(
t
x
T
A
I
t
R
I
t
V
(11)
Using equation (9) we can write:
2
1
1284
.
1
)
(
e
e
t
G
A
I
t
V
(12)
Example of voltage versus
t
measurement:
Equation (12) can be written (in the linear zone) as:
t
m
V
(13)
Where
m
is the slope,
2
1
1284
.
1
e
e
G
A
I
m
(
s
V
/
)
(14)
Summary of Contents for TCi
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