TCi Operator Manual
100
For example,
CF=a*(1/m)+b
. If a=1.1 and b=0.3, and the measured
1/m
=100, then the corrected
1/m
to be used for the calculation of effusivity and
k
would be 110.3 (
1/m
is automatically
corrected by software).
Presently, 2 CAs other than water are used, glycol for low temperature (down to -50
C) and
Wakefield 120 thermal grease for high temperatures, extended testing, and porous or absorbent
materials. Hopefully, in future only one CA would be specified for the complete temperature
range, thus no CF would be needed.
Contact Agent
Cal Method
Temperature
A
B
Water
Polymers, Ceramics, Metals
5 to 70°C
1.0
0
Glycol
Polymers, Ceramics
-50 to 5°C
1.020
0.000
Metals
-50 to 5°C
1.050
0.000
Wakefield 120 Thermal
Grease
Polymers
-50
1.127
-8.332
-25
1.091
-5.598
0
1.057
-3.230
20
1.031
-1.599
25
1.025
-1.227
50
0.995
0.410
75
0.968
0.963
100
0.942
0.963
125
0.918
0.963
150
0.897
0.963
175
0.877
0.963
200
0.859
0.963
Ceramics
-50
0.969
15.562
-25
0.985
10.281
0
0.998
5.461
20
1.004
1.936
25
1.006
1.101
50
1.010
-2.799
75
1.010
-6.238
100
1.006
-9.217
125
0.998
-11.736
150
0.987
-13.795
175
0.971
-15.393
200
0.951
-16.531
Note: foams and liquids do not need a CA, and therefore no CF.
9.4
Thermal conductivity (k) calibration
Calibration and measurements of
k
are based on same data acquired for effusivity. The same
separation into material groups and power levels, and contact agents apply for
k
as well.
Summary of Contents for TCi
Page 1: ...C Therm TCi Operator Manual TH130041 Rev H...
Page 2: ......
Page 6: ...TCi Operator Manual vi...
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