TCi Operator Manual
96
G
A
I
e
e
m
1284
.
1
1
2
1
(
V
s
/
)
(15)
If
e
2
is 0, i.e. sensor response is measured in vacuum, then:
G
A
I
e
vacuum
m
1284
.
1
)
(
1
1
(16)
The figure (
e
1
/IAG
) is a sensor/system figure of merit, and depends only on sensor characteristics
and supplied power, and may be used for calibration.
Example of sensor effusivity calibration curve using vacuum and other materials is given below.
The calibration line shows very good linearity.
The calibration line can be written as:
C
e
M
m
2
1
(17)
Where
M
is the slope of the effusivity calibration and is equal to:
G
A
I
M
1284
.
1
1
(
Amp
W
C
m
2
)
(18)
And
C
is:
G
A
I
e
C
1284
.
1
1
(
V
s
)
(19)
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