CM-2201 Appendices
35
©2015 Nelson Heat Tracing Systems
www.nelsonheaters.com GA2497 Rev. 2
Appendix E - RTD Tables
Temperature Conversion
Platinum Resistance (-328
°F to 1220°F)
Temperature Coefficient - 0.00385 Ohms/Ohm/
°F
°F
Ohms
°F
Ohms
°F
Ohms
°F
Ohms
°F
Ohms
°F
Ohms
104
115.54
140
123.24
176
130.90
212
138.51
248
146.07
284
153.58
105
115.76
141
123.46
177
131.11
213
138.72
249
146.28
285
153.79
106
115.97
142
123.67
178
131.32
214
138.93
250
146.49
286
154.00
107
116.18
143
123.88
179
131.53
215
139.14
251
146.70
287
154.21
108
116.40
144
124.09
180
131.74
216
139.35
252
146.91
288
154.42
109
116.61
145
124.31
181
131.96
217
139.56
253
147.11
289
154.62
110
116.83
146
124.52
182
132.17
218
139.77
254
147.32
290
154.83
111
117.04
147
124.73
183
132.38
219
139.98
255
147.53
291
155.04
112
117.26
148
124.95
184
132.59
220
140.19
256
147.74
292
155.25
113
117.47
149
125.16
185
132.8
221
140.4
257
147.95
293
155.46
114
117.68
150
125.37
186
133.01
222
140.61
258
148.16
294
155.66
115
117.90
151
125.59
187
133.23
223
140.82
259
148.37
295
155.87
116
118.11
152
125.80
188
133.44
224
141.03
260
148.58
296
156.08
117
118.33
153
126.01
189
133.65
225
141.24
261
148.79
297
156.29
118
118.54
154
126.22
190
133.86
226
141.45
262
149.00
298
156.49
119
118.76
155
126.44
191
134.07
227
141.66
263
149.21
299
156.7
120
118.97
156
126.65
192
134.28
228
141.87
264
149.41
300
156.91
121
119.18
157
126.86
193
134.5
229
142.08
265
149.62
301
157.12
122
119.4
158
127.08
194
134.71
230
142.29
266
149.83
302
157.33
123
119.61
159
127.29
195
134.92
231
142.5
267
150.04
303
157.53
124
119.82
160
127.50
196
135.13
232
142.71
268
150.25
304
157.74
125
120.04
161
127.71
197
135.34
233
142.92
269
150.46
305
157.95
126
120.25
162
127.93
198
135.55
234
143.13
270
150.67
306
158.15
127
120.47
163
128.14
199
135.76
235
143.34
271
150.88
307
158.36
128
120.68
164
128.35
200
135.97
236
143.55
272
151.08
308
158.57
129
120.89
165
128.56
201
136.19
237
143.76
273
151.29
309
158.78
130
121.11
166
128.78
202
136.4
238
143.97
274
151.50
310
158.98
131
121.32
167
128.99
203
136.61
239
144.18
275
151.71
311
159.19
132
121.53
168
129.20
204
136.82
240
144.39
276
151.92
312
159.40
133
121.75
169
129.41
205
137.03
241
144.60
277
152.13
313
159.61
134
121.96
170
129.62
206
137.24
242
144.81
278
152.33
314
159.81
135
122.18
171
129.84
207
137.45
243
145.02
279
152.54
315
160.02
136
122.39
172
130.05
208
137.66
244
145.23
280
152.75
316
160.23
137
122.60
173
130.26
209
137.87
245
145.44
281
152.96
317
160.43
138
122.82
174
130.47
210
138.08
246
145.65
282
153.17
318
160.64
139
123.03
175
130.68
211
138.29
247
145.86
283
153.38
319
160.85