Appendix B - Thermistor Temperature Derivation; Isplacement Transducer Shermistor Resistance To Tesistance Versus Temperature; Emperature - Geokon 4450 Instruction Manual

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APPENDIX B - THERMISTOR TEMPERATURE DERIVATION

Thermistor Type: YSI 44005, Dale #1C3001-B3, Alpha #13A3001-B3
Resistance to Temperature Equation:
Equation B-1 Convert Thermistor Resistance to Temperature
T  Temperature in C.
where:
LnR  Natural Log of Thermistor Resistance
A  1.4051  10 -3 (coefficients calculated over the 50 to +150 C. span)
B  2.369  10 -4
C  1.019  10 -7
Ohms Temp Ohms
201.1K -50 16.60K
187.3K -49 15.72K
174.5K -48 14.90K
162.7K -47 14.12K
151.7K -46 13.39K
141.6K -45 12.70K
132.2K -44 12.05K
123.5K -43 11.44K
115.4K -42 10.86K
107.9K -41 10.31K
101.0K -40
94.48K -39
88.46K -38
82.87K -37
77.66K -36
72.81K -35
68.30K -34
64.09K -33
60.17K -32
56.51K -31
53.10K -30
49.91K -29
46.94K -28
44.16K -27
41.56K -26
39.13K -25
36.86K -24
34.73K -23
32.74K -22
30.87K -21
29.13K -20
27.49K -19
25.95K -18
24.51K -17
23.16K -16
21.89K -15
20.70K -14
19.58K -13
18.52K -12
17.53K -11
Table B-1 Thermistor Resistance versus Temperature

T

A B LnR (
Temp Ohms
-10 2417
-9 2317
-8 2221
-7 2130
-6 2042
-5 1959
-4 1880
-3 1805
-2 1733
-1 1664
9796 0 1598
1
9310 1535
8851 2 1475
8417 3 1418
8006 4 1363
7618 5 1310
7252 6 1260
6905 7 1212
6576 8 1167
6265 9 1123
5971 10 1081
5692 11 1040
5427 12 1002
5177 13 965.0
4939 14 929.6
4714 15 895.8
4500 16 863.3
4297 17 832.2
4105 18 802.3
3922 19 773.7
3748 20 746.3
3583 21 719.9
3426 22 694.7
3277 23 670.4
3135 24 647.1
3000 25 624.7
2872 26 603.3
2750 27 582.6
2633 28 562.8
2523 29 543.7
1

273 2 .
 3
) C LnR ( )
Temp Ohms Temp
30
525.4
31 507.8
32 490.9
33 474.7
34 459.0
35 444.0
36 429.5
37 415.6
38 402.2
39 389.3
40 376.9
41 364.9
42 353.4
43 342.2
44 331.5
45 321.2
46 311.3
47 301.7
48 292.4
49 283.5
50 274.9
51 266.6
52 258.6
53 250.9
54 243.4
55 236.2
56 229.3
57 222.6
58 216.1
59 209.8
60 203.8
61 197.9
62 192.2
63 186.8
64 181.5
65 176.4
66 171.4
67 166.7
68 162.0
69 157.6
Ohms Temp
70 110
153.2
71 149.0 111
72 145.0 112
73 141.1 113
74 137.2 114
75 133.6 115
76 130.0 116
77 126.5 117
78 123.2 118
79 119.9 119
80 116.8 120
81 113.8 121
82 110.8 122
83 107.9 123
84 105.2 124
85 102.5 125
86 99.9 126
87 97.3 127
88 94.9 128
89 92.5 129
90 90.2 130
91 87.9 131
92 85.7 132
93 83.6 133
94 81.6 134
95 79.6 135
96 77.6 136
97 75.8 137
98 73.9 138
99 72.2 139
100 70.4 140
101 68.8 141
102 67.1 142
103 65.5 143
104 64.0 144
105 62.5 145
106 61.1 146
107 59.6 147
108 58.3 148
109 56.8 149
55.6 150