Appendices
CM-2201/CM-2202
Appendix G
RTD Tables (°C)
©2018 Nelson Heat Tracing Systems
www.nelsonheaters.com
GA2497 Rev.6
39
Temperature Conversion
Platinum Resistance (-200°C to 239°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC
°C
Ohms
°C
Ohms
C
Ohms
°C
Ohms
°C
Ohms
°C
Ohms
-200
18.49
-137
45.11
-74
70.73
-11
95.69
51
119.78
114
143.80
-199
18.93
-136
45.52
-73
71.13
52
120.16
115
144.17
-198
19.36
-135
45.94
-72
71.53
-10
96.09
53
120.55
116
144.55
-197
19.79
-134
46.35
-71
71.93
-9
96.48
54
120.93
117
144.93
-196
20.22
-133
46.76
-8
96.87
55
121.32
118
145.31
-195
20.65
-132
47.18
-70
72.33
-7
97.26
56
121.70
119
145.68
-194
21.08
-131
47.59
-69
72.73
-6
97.65
57
122.09
-193
21.51
-68
73.13
-5
98.04
58
122.47
120
146.06
-192
21.94
-130
48.00
-67
73.53
-4
98.44
59
122.86
121
146.44
-191
22.37
-129
48.41
-66
73.93
-3
98.83
122
146.81
-128
48.82
-65
74.33
-2
99.22
60
123.24
123
147.19
-190
22.80
-127
49.23
-64
74.73
-1
99.61
61
123.62
124
147.57
-189
23.23
-126
49.64
-63
75.13
62
124.01
125
147.94
-188
23.66
-125
50.06
-62
75.53
0
100.00
63
124.39
126
148.32
-187
24.09
-124
50.47
-61
75.93
1
100.39
64
124.77
127
148.70
-186
24.52
-123
50.88
2
100.78
65
125.16
128
149.07
-185
24.94
-122
51.29
-60
76.33
3
101.17
66
125.54
129
149.45
-184
25.37
-121
51.70
-59
76.73
4
101.56
67
125.92
-183
25.80
-58
77.13
5
101.95
68
126.31
130
149.82
-182
26.23
-120
52.11
-57
77.52
6
102.34
69
126.69
131
150.20
-181
26.65
-119
52.52
-56
77.92
7
102.73
132
150.57
-118
52.92
-55
78.32
8
103.12
70
127.07
133
150.95
-180
27.08
-117
53.33
-54
78.72
9
103.51
71
127.45
134
151.33
-179
27.50
-116
53.74
-53
79.11
72
127.84
135
151.70
-178
27.93
-115
54.15
-52
79.51
10
103.90
73
128.22
136
152.08
-177
28.35
-114
54.56
-51
79.91
11
104.29
74
128.60
137
152.45
-176
28.78
-113
54.97
12
104.68
75
128.98
138
152.83
-175
29.20
-112
55.38
-50
80.31
13
105.07
76
129.37
139
153.20
-174
29.63
-111
55.78
-49
80.70
14
105.46
77
129.75
-173
30.05
-48
81.10
15
105.85
78
130.13
140
153.58
-172
30.47
-110
56.19
-47
81.50
16
106.24
79
130.51
141
153.95
-171
30.90
-109
56.60
-46
81.89
17
106.63
142
154.32
-108
57.00
-45
82.29
18
107.02
80
130.89
143
154.70
-170
31.32
-107
57.41
-44
82.69
19
107.40
81
131.27
144
155.07
-169
31.74
-106
57.82
-43
83.08
82
131.66
145
155.45
-168
32.16
-105
58.22
-42
83.48
20
107.79
83
132.04
146
155.82
-167
32.59
-104
58.63
-41
83.88
21
108.18
84
132.42
147
156.19
-166
33.01
-103
59.04
22
108.57
85
132.80
148
156.57
-165
33.43
-102
59.44
-40
84.27
23
108.96
86
133.18
149
156.94
-164
33.85
-101
59.85
-39
84.67
24
109.35
87
133.56
