Appendix C. Thermistor Temperature Derivation; 3Kω Thermistor Resistance; Table 20: 3Kω Thermistor Resistance - Geokon GeoNet 8900 Series Instruction Manual

30 | THERMISTOR TEMPERATURE DERIVATION | GEOKON
APPENDIX C. THERMISTOR TEMPERATURE
DERIVATION
C.1 3KΩ THERMISTOR RESISTANCE
Thermistor Types:
■
YSI 44005, Dale #1C3001–B3, Alpha #13A3001–B3
■
Honeywell 192–302LET–A01
Resistance to Temperature Equation:
1
T =
A+B(LnR)+C(LnR
EQUATION 1: 3kΩ Thermistor Resistance
Where:
T = Temperature in °C
LnR = Natural Log of Thermistor Resistance
–3
A = 1.4051 x 10
–4
B = 2.369 x 10
–7
C = 1.019 x 10
Note: Coefficients calculated over the –50 to +150 C span.
Ohms Temp Ohms Temp
201.1K -50 15.72K -9
187.3K -49 14.90K -8
174.5K -48 14.12K -7
162.7K -47 13.39K -6
151.7K -46 12.70K -5
141.6K -45 12.05K -4
132.2K -44 11.44K -3
123.5K -43 10.86K -2
115.4K -42 10.31K -1
107.9K -41 9796 0
101.0K -40 9310 1
94.48K -39 8851 2
88.46K -38 8417 3
82.87K -37 8006 4
77.66K -36 7618 5
72.81K -35 7252 6
68.30K -34 6905 7
64.09K -33 6576 8
60.17K -32 6265 9
56.51K -31 5971 10
53.10K -30 5692 11
49.91K -29 5427 12
46.94K -28 5177 13
44.16K -27 4939 14
41.56K -26 4714 15
39.13K -25 4500 16
36.86K -24 4297 17
34.73K -23 4105 18
32.74K -22 3922 19
30.87K -21 3748 20
29.13K -20 3583 21
27.49K -19 3426 22
25.95K -18 3277 23
24.51K -17 3135 24
23.16K -16 3000 25
21.89K -15 2872 26
20.70K -14 2750 27
19.58K -13 2633 28
18.52K -12 2523 29
17.53K -11 2417 30
16.60K -10 2317 31
TABLE 20: 3KΩ Thermistor Resistance
–
273.15
3
)
Ohms Temp Ohms Temp
2221 32 474.7 73
2130 33 459.0 74
2042 34 444.0 75
1959 35 429.5 76
1880 36 415.6 77
1805 37 402.2 78
1733 38 389.3 79
1664 39 376.9 80
1598 40 364.9 81
1535 41 353.4 82
1475 42 342.2 83
1418 43 331.5 84
1363 44 321.2 85
1310 45 311.3 86
1260 46 301.7 87
1212 47 292.4 88
1167 48 283.5 89
1123 49 274.9 90
1081 50 266.6 91
1040 51 258.6 92
1002 52 250.9 93
965.0 53 243.4 94
929.6 54 236.2 95
895.8 55 229.3 96
863.3 56 222.6 97
832.2 57 216.1 98
802.3 58 209.8 99
773.7 59 203.8 100
746.3 60 197.9 101
719.9 61 192.2 102
694.7 62 186.8 103
670.4 63 181.5 104
647.1 64 176.4 105
624.7 65 171.4 106
603.3 66 166.7 107
582.6 67 162.0 108
562.8 68 157.6 109
543.7 69 153.2 110
525.4 70 149.0 111
507.8 71 145.0 112
490.9 72 141.1 113
20:
Ohms Temp
137.2 114
133.6 115
130.0 116
126.5 117
123.2 118
119.9 119
116.8 120
113.8 121
110.8 122
107.9 123
105.2 124
102.5 125
99.9 126
97.3 127
94.9 128
92.5 129
90.2 130
87.9 131
85.7 132
83.6 133
81.6 134
79.6 135
77.6 136
75.8 137
73.9 138
72.2 139
70.4 140
68.8 141
67.1 142
65.5 143
64.0 144
62.5 145
61.1 146
59.6 147
58.3 148
56.8 149
55.6 150