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Temperatures corresponding to different Percentages cf the radiation from a black body held at the temperature of melting palladium (1829°K) using a red glass with an effective wave-length which varies as is shown in column two. (c2 = 14330μ deg.)
Transmission of Sector
λe
T2 in Degrees Kelvin
0.749
0.6654
1786
.499
.6655
1728
.2443
.6656
1632
.0830
.6658
1509
.0336
.6660
1426
.01668
.6662
1356
.00542
.6665
1267
Table 2
Extrapolated temperatures, using red glass, for various sectors with transmission as given. c2 = 14330μ deg.
Transmission of Sectot
0.2443
0.0830
0.01664
0.00542
Initial Temperature
λe
Deg. K
λe
Deg. K
λe
Deg. K
λe
Deg.K
1200°K
0.6675μ
1303
0.6673μ
1398
0.6670μ
1555
0.6668μ
1693
1300
.6671
1421
.6668
1530
.6665
1727
.6663
1899
1400
.6667
1541
.6664
1672
.6661
1909
.6659
2119
1500
.6663
1663
.6660
1816
.6657
2100
.6654
2355
1600
.6659
1788
.6656
1964
.6652
2300
.6650
2611
1700
.6655
1913
.6652
2117
.6648
2512
.6646
2888
1800
.6651
2042
.6648
2274
.6645
2739
.6643
3188
1900
.6647
2171
.6645
2435
.6642
2968
.6640
3515
Table 3
Errors in extrapolated temperatures due to an error in the effective wave-length
A—using effective wave-length for interval between 1336 and 1829°K.
B—using effective wave-length that is 1% too large.
Table 4
Energy Ratios and Corrections to Temperatures as Calculated with Wien’s Equation to Reduce Them to What Woidd be Obtained from Planck’s Equation for λ =.665μ for Definite Values of Brightness.
Temperature in °K
λT
Energy Ratios Ep/Ew
Corrections to True Temperature
2000
1330
1.00003
−<0.01°K
2600
1730
1.0003
− 0.05
3000
1990
1.0007
− 0.3
3600
2390
1.0025
− 1.5
4500
2990
1.0084
− 8.5
5000
3320
1.0135
− 15.6
6000
3990
1.0280
− 47.0
Table 5
Transmission of the absorbing glasses at different temperatures.
T Temperature of glass
Per cent transmission of Noviweld absorbing glass
Per cent transmission of Jena absorbing glass
20°C
1.70%
8.96%
102
1.55
8.90
200
1.39
8.87
Table 6
Extrapolated temperatures using red glass for one absorbing glass and for two absorbing glasses having the transmissions shown in Figs. 8 and 9. c2 = 14330μ deg.
Initial Temperature
Transmission of one absorbing glass
Extrapolation temperature for one absorbing glass
Transmission of two absorbing glasses
Extrapolated temperature for two absorbing glasses
1200°K
.000238
2229
1300
.000233
2606
1400
.0149
1922
.000230
3047
1500
.0148
2116
.000227
3568
1600
.0147
2322
.000224
4149
1700
.0147
2540
.000221
4972
1880
.0146
2771
.000218
5952
Table 7
Corrections to Add to Brightness Temperature Readings for Different Emissivity
Emissivity
Pyrometer using red light, wave-length λ = 0.665μ at observed temperatures, degree Kelvin of —
1000
1100
1200
1300
1400
1500
1600
1700
1800
2000
2200
2400
2600
2800
3000
3600
0.10
119
146
176
209
246
286
329
377
429
543
676
827
1000
1196
1416
2251
.20
80
98
118
140
163
189
217
247
279
352
433
524
627
740
867
1325
.30
59
72
86
102
119
137
157
178
201
251
308
371
442
519
604
907
.40
44
54
64
76
89
102
117
132
149
186
227
272
323
379
439
651
.50
33
40
48
57
66
76
87
98
110
137
167
201
237
277
320
472
.60
24
29
35
41
48
55
63
71
80
99
121
145
170
199
229
336
.70
17
20
24
29
33
38
43
49
55
68
83
99
117
136
157
228
.80
10
13
15
18
21
24
27
30
34
42
51
61
72
84
96
139
.85
7
9
11
13
15
17
19
22
25
31
37
44
52
60
70
96
.90
5
6
7
8
10
11
13
14
16
20
24
28
33
39
45
65
1.00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
The values given in this table also give the correction for a window Laving the transmission given in column 1 for different temperatures of the source when this window is used between the source and the pyrometer.
Tables (7)
Table 1
Temperatures corresponding to different Percentages cf the radiation from a black body held at the temperature of melting palladium (1829°K) using a red glass with an effective wave-length which varies as is shown in column two. (c2 = 14330μ deg.)
Transmission of Sector
λe
T2 in Degrees Kelvin
0.749
0.6654
1786
.499
.6655
1728
.2443
.6656
1632
.0830
.6658
1509
.0336
.6660
1426
.01668
.6662
1356
.00542
.6665
1267
Table 2
Extrapolated temperatures, using red glass, for various sectors with transmission as given. c2 = 14330μ deg.
Transmission of Sectot
0.2443
0.0830
0.01664
0.00542
Initial Temperature
λe
Deg. K
λe
Deg. K
λe
Deg. K
λe
Deg.K
1200°K
0.6675μ
1303
0.6673μ
1398
0.6670μ
1555
0.6668μ
1693
1300
.6671
1421
.6668
1530
.6665
1727
.6663
1899
1400
.6667
1541
.6664
1672
.6661
1909
.6659
2119
1500
.6663
1663
.6660
1816
.6657
2100
.6654
2355
1600
.6659
1788
.6656
1964
.6652
2300
.6650
2611
1700
.6655
1913
.6652
2117
.6648
2512
.6646
2888
1800
.6651
2042
.6648
2274
.6645
2739
.6643
3188
1900
.6647
2171
.6645
2435
.6642
2968
.6640
3515
Table 3
Errors in extrapolated temperatures due to an error in the effective wave-length
A—using effective wave-length for interval between 1336 and 1829°K.
B—using effective wave-length that is 1% too large.
Table 4
Energy Ratios and Corrections to Temperatures as Calculated with Wien’s Equation to Reduce Them to What Woidd be Obtained from Planck’s Equation for λ =.665μ for Definite Values of Brightness.
Temperature in °K
λT
Energy Ratios Ep/Ew
Corrections to True Temperature
2000
1330
1.00003
−<0.01°K
2600
1730
1.0003
− 0.05
3000
1990
1.0007
− 0.3
3600
2390
1.0025
− 1.5
4500
2990
1.0084
− 8.5
5000
3320
1.0135
− 15.6
6000
3990
1.0280
− 47.0
Table 5
Transmission of the absorbing glasses at different temperatures.
T Temperature of glass
Per cent transmission of Noviweld absorbing glass
Per cent transmission of Jena absorbing glass
20°C
1.70%
8.96%
102
1.55
8.90
200
1.39
8.87
Table 6
Extrapolated temperatures using red glass for one absorbing glass and for two absorbing glasses having the transmissions shown in Figs. 8 and 9. c2 = 14330μ deg.
Initial Temperature
Transmission of one absorbing glass
Extrapolation temperature for one absorbing glass
Transmission of two absorbing glasses
Extrapolated temperature for two absorbing glasses
1200°K
.000238
2229
1300
.000233
2606
1400
.0149
1922
.000230
3047
1500
.0148
2116
.000227
3568
1600
.0147
2322
.000224
4149
1700
.0147
2540
.000221
4972
1880
.0146
2771
.000218
5952
Table 7
Corrections to Add to Brightness Temperature Readings for Different Emissivity
Emissivity
Pyrometer using red light, wave-length λ = 0.665μ at observed temperatures, degree Kelvin of —
1000
1100
1200
1300
1400
1500
1600
1700
1800
2000
2200
2400
2600
2800
3000
3600
0.10
119
146
176
209
246
286
329
377
429
543
676
827
1000
1196
1416
2251
.20
80
98
118
140
163
189
217
247
279
352
433
524
627
740
867
1325
.30
59
72
86
102
119
137
157
178
201
251
308
371
442
519
604
907
.40
44
54
64
76
89
102
117
132
149
186
227
272
323
379
439
651
.50
33
40
48
57
66
76
87
98
110
137
167
201
237
277
320
472
.60
24
29
35
41
48
55
63
71
80
99
121
145
170
199
229
336
.70
17
20
24
29
33
38
43
49
55
68
83
99
117
136
157
228
.80
10
13
15
18
21
24
27
30
34
42
51
61
72
84
96
139
.85
7
9
11
13
15
17
19
22
25
31
37
44
52
60
70
96
.90
5
6
7
8
10
11
13
14
16
20
24
28
33
39
45
65
1.00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
The values given in this table also give the correction for a window Laving the transmission given in column 1 for different temperatures of the source when this window is used between the source and the pyrometer.