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Appendices
CM-2201/CM-2202
Appendix G
RTD Tables (°C)
©2018 Nelson Heat Tracing Systems
www.nelsonheaters.com
GA2497 Rev.6
40
Temperature Conversion
Platinum Resistance (-200°C to 239°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC
-163
34.27
-38
85.06
25
109.73
88
133.94
150
157.31
-162
34.69
-100
60.25
-37
85.46
26
110.12
89
134.32
151
157.69
-161
35.11
-99
60.66
-36
85.85
27
110.51
152
158.06
-98
61.06
-35
86.25
28
110.90
90
134.70
153
158.43
-160
35.53
-97
61.47
-34
86.64
29
111.28
91
135.08
154
158.81
-159
35.95
-96
61.87
-33
87.04
92
135.46
155
159.18
-158
36.37
-95
62.28
-32
87.43
30
111.67
93
135.84
156
159.55
-157
36.79
-94
62.68
-31
87.83
31
112.06
94
136.22
157
159.93
-156
37.21
-93
63.09
32
112.45
95
136.60
158
160.30
-155
37.63
-92
63.49
-30
88.22
33
112.83
96
136.98
159
160.67
-154
38.04
-91
63.90
-29
88.62
34
113.22
97
137.36
-153
38.46
-28
89.01
35
113.61
98
137.74
160
161.04
-152
38.88
90
64.30
-27
89.40
36
113.99
99
138.12
161
161.42
-151
39.30
-89
64.70
-26
89.80
37
114.38
162
161.79
-88
65.11
-25
90.19
38
114.77
100
138.50
163
162.16
-150
39.71
-87
65.51
-24
90.59
39
115.15
101
138.88
164
162.53
-149
40.13
-86
65.91
-23
90.98
102
139.26
165
162.90
-148
40.55
-85
66.31
-22
91.37
40
115.54
103
139.64
166
163.27
-147
40.96
-84
66.72
-21
91.77
41
115.93
104
140.02
167
163.65
-146
41.38
-83
67.12
42
116.31
105
140.39
168
164.02
-145
41.79
-82
67.52
-20
92.16
43
116.70
106
140.77
169
164.39
-144
42.21
-81
67.92
-19
92.55
44
117.08
107
141.15
-143
42.63
-18
92.95
45
117.47
108
141.53
170
164.76
-142
43.04
-80
68.33
-17
93.34
46
117.85
109
141.91
171
165.13
-141
43.45
-79
68.73
-16
93.73
47
118.24
172
165.50
-78
69.13
-15
94.12
48
118.62
110
142.29
173
165.87
-140
43.87
-77
69.53
-14
94.52
49
119.01
111
142.66
174
166.24
-139
44.28
-76
69.93
-13
94.91
112
143.04
175
166.61
-138
44.70
-75
70.33
-12
95.30
50
119.40
113
143.42
176
166.98
Temperature Conversion
Platinum Resistance (240°C to 629°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC
°C
Ohms
°C
Ohms
C
Ohms
°C
Ohms
°C
Ohms
°C
Ohms
240
190.45
301
212.37
362
233.87
423
254.93
484
275.56
545
295.75
241
190.81
302
212.73
363
234.22
424
255.27
485
275.89
546
296.08
242
191.18
303
213.09
364
234.56
425
255.61
486
276.23
547
296.41
243
191.54
304
213.44
365
234.91
426
255.95
487
276.56
548
296.74
244
191.90
305
213.80
366
235.26
427
256.29
488
276.89
549
297.06
245
192.26
306
214.15
367
235.61
428
256.63
489
277.23
246
192.63
307
214.51
368
235.96
429
258.98
550
297.39