Geosense VWNPC-3000, Instruction Manual

Page: 24 / 30

24
V1.4 March 15
6.3 Temperature compensation
USING STEINHART & HART LOG
Thermistor Type. YSI 44005, Dale 1C 3001 B3, Alpha 13A3001
-
B3
Resistance/ temperature equation:
-
T= (1 / (A + B (LnR) + C(LnR)
3
)) – 273.2
Where:
-
T = Temperature in degrees Centigrade
LnR= Natural log of Thermistor resistance.
A= 1.4051* 10 -
3
B= 2.369*10
-
4
C=1.019*10 -
7
(Applicable to the range – 50 to + 150 Centigrade only )
Ohms Temp Ohms Temp Ohms Temp Ohms Temp Ohms Temp
201.1K
-
50 16.60K
-
10 2417 30 525.4 70 153.2 110
187.3K
-
49 15.72K
-
9 2317 31 507.8 71 149.0 111
174.5K
-
48 14.90K
-
8 2221 32 490.9 72 145.0 112
162.7K
-
47 14.12K
-
7 2130 33 474.7 73 141.1 113
151.7K
-
46 13.39K
-
6 2042 34 459.0 74 137.2 114
141.6K
-
45 12.70K
-
5 1959 35 444.0 75 133.6 115
132.2K
-
44 12.05K
-
4 1880 36 429.5 76 130.0 116
123.5K
-
43 11.44K
-
3 1805 37 415.6 77 126.5 117
115.4K
-
42 10.86K
-
2 1733 38 402.2 78 123.2 118
107.9K
-
41 10.31K
-
1 1664 39 389.3 79 119.9 119
101.0K
-
40 9796 0 1598 40 376.9 80 116.8 120
94.48K
-
39 9310 1 1535 41 364.9 81 113.8 121
88.46K
-
38 8851 2 1475 42 353.4 82 110.8 122
82.87K
-
37 8417 3 1418 43 342.2 83 107.9 123
77.66K
-
36 8006 4 1363 44 331.5 84 105.2 124
72.81K
-
35 7618 5 1310 45 321.2 85 102.5 125
68.30K
-
34 7252 6 1260 46 311.3 86 99.9 126
64.09K
-
33 6905 7 1212 47 301.7 87 97.3 127
60.17K
-
32 6576 8 1167 48 292.4 88 94.9 128
56.51K
-
31 6265 9 1123 49 283.5 89 92.5 129
53.10K
-
30 5971 10 1081 50 274.9 90 90.2 130
49.91K
-
29 5692 11 1040 51 266.6 91 87.9 131
46.94K
-
28 5427 12 1002 52 258.6 92 85.7 132
44.16K
-
27 5177 13 965.0 53 250.9 93 83.6 133
41.56K
-
26 4939 14 929.6 54 243.4 94 81.6 134
39.13K
-
25 4714 15 895.8 55 236.2 95 79.6 135
36.86K
-
24 4500 16 863.3 56 229.3 96 77.6 136
34.73K
-
23 4297 17 832.2 57 222.6 97 75.8 137
32.74K
-
22 4105 18 802.3 58 216.1 98 73.9 138
30.87K
-
21 3922 19 773.7 59 209.8 99 72.2 139
29.13K
-
20 3748 20 746.3 60 203.8 100 70.4 140
27.49K
-
19 3583 21 719.9 61 197.9 101 68.8 141
25.95K
-
18 3426 22 694.7 62 192.2 102 67.1 142
24.51K
-
17 3277 23 670.4 63 186.8 103 65.5 143
23.16K
-
16 3135 24 647.1 64 181.5 104 64.0 144
21.89K
-
15 3000 25 624.7 65 176.4 105 62.5 145
20.70K
-
14 2872 26 603.3 66 171.4 106 61.1 146
19.58K
-
13 2750 27 582.6 67 166.7 107 59.6 147
18.52K
-
12 2633 28 562.8 68 162.0 108 58.3 148
17.53K
-
11 2523 29 543.7 69 157.6 109 56.8 149
Resistance versus temperature table