3D打印是目前比较热门的产品，从普通消费品到航空航天，再到人体生命，3D打印几乎无所不能，但是3D打印机的挤出头确实3D打印机的关键部位，如何能保护好3D打印机的挤出头不被高温损坏，这里就要求有一个高可靠性的温度传感器，华巨电子在这一方面是同行业领先的，华巨电子生产的用于3D打印机挤出头的热敏电阻在3D打印机中有着广泛的应用，得到客户的好评，其高温稳定性和测温精度都是同行中做好的，华巨电子生产的3D打印机NTC温度传感器测温范围可达（-50~350℃）,3D打印机通常用NTC的热敏电阻, 且因為喷嘴工作温度大约在200℃左右, （华巨电子生产的3D打印机用热敏电阻工作温度范围是（-50~350℃）远远超过3D打印机挤出头的温度）所以所用的热敏电阻至少要耐温到250℃左右。
市面上很多温度传感器达不到250度, 往往会, 装上去时温度好像是对的, 可是到了150℃左右温度显示却上不去, 喷嘴都热到冒泡了, 也出现了焦味(热敏电阻被烤焦了), 显示温度是错的!
另一个重要的参数是B值, 它表示热敏电阻随温度变化的程℃, 公式如下:
R(t) = R0 * Exp(B*((1/t) - (1/t0)))
其中R0表示在温度t0时的阻值, 一般常见如25℃下100K或10K等等不同的阻值。
R(t)则表示在温度t时的阻值, 其中 t 和 t0 都要用凯氏温度表示, 所以等於是273.13加上摄氏温度。
知道 t0, R0, 和 B 值, 将公式输入Excel就可以由 R(t) 算出 t 值。
在3D打印机里面, 这个热敏电阻会串一个pull-high电阻, 通常是4.7K ohm, 然后由ADC读出分压即可算出阻值; 知道阻值就等於知道了温度。
例如若采用100K, B值為3950的热敏电阻, 则在100℃时可算出R(t)=6.97K ohm, 再和4.7K ohm做分压, 由10bit ADC读出值為611。
基本上这就是打印机感应喷嘴上温度的方式, 这部份会直接对应到firmware的原始码中。了解了这样, 万一找不到和原来一模一样规格的热敏电阻, 自己改firmware也是可以的。
基本理论知道了, 接下来就是实作。
先看一下我找到的热敏电阻, 长这样, 是玻璃封装的。
它的资料如下:
资料：负温度系数（NTC）热敏电阻
型号：MF51-104F3950FA-1.25
R @ 25：K100K 1％
B25/50：K3950 1％
元素：单端玻封热敏电阻
特性
1）电气特性
A：电阻值：R（25°C）= 100K±1％
B：B值：B=3950±1％（在25℃和50℃的电阻值计算出）
C：绝缘电阻50MΩ或以上DC500V兆欧表（玻璃和引线之间）
2）热时间常数（τ）：τ≤6S（在静止空气中）
3）热耗散系数（δ）：δ=1.1~1.6MW/°C（在静止空气中）
4）工作温度范围：-50~ 350°C
换电阻只要两个焊点, 其实也非常简单。要注意的是要用铁氟龙套管把电阻两端做好绝缘, 并做好固定。
固定的材料当然也是要选择耐热的, 原来的设计是用石绵(应该是吧)衬垫夹住热敏电阻, 但那个衬垫在我拆装几次后就已经破烂到无法使用了。在这个步骤我花了很多时间, 最后还是用铁氟龙胶带从旁边固定, 让热敏电阻直接靠在加热片上。
把热敏电阻固定好, 喷嘴装回去, 硬体部份就大功告成了。注意装的时候喷嘴要锁紧, 否则材料会溢出直接在加热片上加热!
1、Specifications
|
MF51-104F3950FA-1.25 | |||||
|
NTC Thermistor |
Resistance value |
B value | |||
|
100kΩ |
±1% |
3950 |
±1% |
B25/50 | |
4、Electrical characteristics电性能
|
Item 项目 |
Symbol符号 |
Test Condition 测试条件 |
Min. 最小值 |
Nor. 正常值 |
Max. 最大值 |
Unit 单位 | |
|
a |
Resistance at 25°C 25°C电阻值 |
R25 |
25±0.05°C |
99 |
100 |
101 |
kΩ |
|
b |
Bvalue B值 |
B25/50 |
|
3910 |
3950 |
3990 |
k |
|
c |
Insulation resistance 绝缘电阻 |
/ |
500VDC |
50 |
/ |
/ |
MΩ |
|
d |
Thermal time constant 热时间常数 |
τ |
in still air 静止空气中 |
/ |
/ |
6 |
sec |
|
e |
Thermal dissipation constant 热耗散系数 |
δ |
in still air 静止空气中 |
1.0 |
/ |
/ |
mw/°C |
|
f |
Operating temperature range 使用温度范围 |
/ |
/ |
-50 |
/ |
350 |
°C |
5、Reliability可靠性
|
Item 项目 |
Specification 技术说明 |
Method of Examination 测试条件及方法 | |
|
5.1 |
high Temp. storage高温存放 |
*ΔR25/ R25≤±2% |
After storeage at 250°C for 1000hrs 250°C环境中放置1000小时 |
|
5.2 |
Low Temp. storage 低温存放 |
After storeage at -40°C for 1000hrs -40°C环境中放置1000小时 | |
|
5.3 |
High temperature and humidity 耐湿热 |
After storeage at 60°C 95%RH for 1000hrs 60°C 95%RH存放1000小时 | |
|
5.4 |
Thermal shock 耐温度冲击 |
*ΔR25/ R25≤±2%
|
100 cycles of following sequence -40°C 10min.---5min. room temp. ---200°C 10min.---5 min. room temp. 经历如下温度循环100次 -40°C10分钟---常温5分钟---200°C10分钟---常温5分钟 |
|
5.5 |
Vibration 振动 |
* no visible damage 无损伤 *ΔR25/ R25≤±2% |
After vibrate test , Frequence 10-500Hz 15min.max amplitude 1.5mm ,in X and Y directions 振幅1.5mm频率10Hz到500Hz 元件受振动试验X、Y方向各15分钟 |
|
5.6 |
Pulling 引线强度 |
* no visible damage 无损伤 *ΔR25/ R25≤±2% |
After applling a force of 2.0N in the axial direction of thermistor, and maintain the force for 10sec. 引线方向施加2.0N拉力，并持续10秒 |
|
5.7 |
Fall down 跌落 |
* no visible damage 无损伤 *ΔR25/ R25≤±2% |
After dropped freely onto wood floor from 1 meter height for 10 times 从1米高度自由落下10次在规定的木板上 |
阻温特性表
TEMPERATURE VS RESISTANCE TABLE
Resistance 100k Ohms at 25deg. C
Resistance Tolerance + / - 1 %
B Value 3950K at 25/50 deg. C
B Value Tolerance + / - 1 %
|
Temp. (deg. C) |
Rmax (k Ohms) |
Rnor (k Ohms) |
Rmin (k Ohms) |
|
-30 |
1858.6927 |
1787.9797 |
1719.7849 |
|
-29 |
1744.9370 |
1679.6017 |
1616.5510 |
|
-28 |
1638.8912 |
1578.5061 |
1520.1940 |
|
-27 |
1539.9847 |
1484.1584 |
1430.2129 |
|
-26 |
1447.6929 |
1396.0662 |
1346.1459 |
|
-25 |
1361.5315 |
1313.7754 |
1267.5675 |
|
-24 |
1281.0560 |
1236.8685 |
1194.0856 |
|
-23 |
1205.8561 |
1164.9598 |
1125.3381 |
|
-22 |
1135.5532 |
1097.6941 |
1060.9911 |
|
-21 |
1069.7992 |
1034.7432 |
1000.7358 |
|
-20 |
1008.2715 |
975.8038 |
944.2871 |
|
-19 |
950.6732 |
920.5962 |
891.3817 |
|
-18 |
896.7294 |
868.8615 |
841.7754 |
|
-17 |
846.1864 |
820.3603 |
795.2428 |
|
-16 |
798.8093 |
774.8710 |
751.5750 |
|
-15 |
754.3810 |
732.1889 |
710.5786 |
|
-14 |
712.7005 |
692.1238 |
672.0741 |
|
-13 |
673.5814 |
654.4999 |
635.8954 |
|
-12 |
636.8513 |
619.1540 |
601.8883 |
|
-11 |
602.3502 |
585.9346 |
569.9095 |
|
-10 |
569.9298 |
554.7016 |
539.8262 |
|
-9 |
539.4526 |
525.3245 |
511.5153 |
|
-8 |
510.7906 |
497.6821 |
484.8615 |
|
-7 |
483.8254 |
471.6621 |
459.7586 |
|
-6 |
458.4467 |
447.1599 |
436.1073 |
|
-5 |
434.5519 |
424.0781 |
413.8153 |
|
-4 |
412.0460 |
402.3264 |
392.7968 |
|
-3 |
390.8401 |
381.8204 |
372.9716 |
|
-2 |
370.8519 |
362.4818 |
354.2653 |
|
-1 |
352.0045 |
344.2375 |
336.6083 |
|
0 |
334.2264 |
327.0195 |
319.9360 |
|
1 |
317.4508 |
310.7640 |
304.1877 |
|
2 |
301.6157 |
295.4121 |
289.3072 |
|
3 |
286.6631 |
280.9084 |
275.2418 |
|
4 |
272.5389 |
267.2014 |
261.9423 |
|
5 |
259.1926 |
254.2428 |
249.3626 |
|
6 |
246.5770 |
241.9877 |
237.4601 |
|
7 |
234.6482 |
230.3940 |
226.1943 |
|
8 |
223.3650 |
219.4224 |
215.5278 |
|
9 |
212.6890 |
209.0361 |
205.4255 |
|
10 |
202.5840 |
199.2007 |
195.8544 |
|
11 |
193.0167 |
189.8841 |
186.7836 |
|
12 |
183.9552 |
181.0559 |
178.1844 |
|
13 |
175.3704 |
172.6881 |
170.0298 |
|
14 |
167.2345 |
164.7540 |
162.2942 |
|
15 |
159.5216 |
157.2290 |
154.9539 |
|
16 |
152.2075 |
150.0898 |
147.9867 |
|
17 |
145.2694 |
143.3144 |
141.3716 |
|
18 |
138.6861 |
136.8825 |
135.0889 |
|
19 |
132.4375 |
130.7749 |
129.1202 |
|
20 |
126.5049 |
124.9734 |
123.4482 |
|
21 |
120.8705 |
119.4612 |
118.0564 |
|
22 |
115.5180 |
114.2223 |
112.9298 |
|
23 |
110.4316 |
109.2417 |
108.0537 |
|
24 |
105.5969 |
104.5053 |
103.4147 |
|
25 |
101.0000 |
100.0000 |
99.0000 |
|
26 |
96.7127 |
95.7132 |
94.7146 |
|
27 |
92.6306 |
91.6333 |
90.6378 |
|
28 |
88.7426 |
87.7492 |
86.7583 |
|
29 |
85.0386 |
84.0505 |
83.0655 |
|
30 |
81.5090 |
80.5274 |
79.5497 |
|
31 |
78.1446 |
77.1707 |
76.2012 |
|
32 |
74.9370 |
73.9717 |
73.0115 |
|
33 |
71.8779 |
70.9222 |
69.9721 |
|
34 |
68.9598 |
68.0144 |
67.0752 |
|
35 |
66.1755 |
65.2411 |
64.3134 |
|
36 |
63.5182 |
62.5954 |
61.6798 |
|
37 |
60.9814 |
60.0707 |
59.1677 |
|
38 |
58.5591 |
57.6610 |
56.7710 |
|
39 |
56.2456 |
55.3604 |
54.4837 |
|
40 |
54.0355 |
53.1635 |
52.3004 |
|
41 |
51.9235 |
51.0651 |
50.2158 |
|
42 |
49.9049 |
49.0602 |
48.2250 |
|
43 |
47.9752 |
47.1443 |
46.3232 |
|
44 |
46.1298 |
45.3130 |
44.5062 |
|
45 |
44.3649 |
43.5621 |
42.7696 |
|
46 |
42.6764 |
41.8878 |
41.1096 |
|
47 |
41.0607 |
40.2862 |
39.5224 |
|
48 |
39.5143 |
38.7539 |
38.0044 |
|
49 |
38.0339 |
37.2876 |
36.5524 |
|
50 |
36.6163 |
35.8842 |
35.1631 |
|
51 |
35.2587 |
34.5405 |
33.8335 |
|
52 |
33.9582 |
33.2538 |
32.5608 |
|
53 |
32.7121 |
32.0214 |
31.3423 |
|
54 |
31.5178 |
30.8408 |
30.1754 |
|
55 |
30.3731 |
29.7096 |
29.0576 |
|
56 |
29.2755 |
28.6253 |
27.9868 |
|
57 |
28.2230 |
27.5860 |
26.9607 |
|
58 |
27.2135 |
26.5895 |
25.9772 |
|
59 |
26.2450 |
25.6338 |
25.0343 |
|
60 |
25.3156 |
24.7171 |
24.1303 |
|
61 |
24.4237 |
23.8376 |
23.2633 |
|
62 |
23.5675 |
22.9937 |
22.4315 |
|
63 |
22.7454 |
22.1836 |
21.6336 |
|
64 |
21.9560 |
21.4061 |
20.8678 |
|
65 |
21.1977 |
20.6594 |
20.1328 |
|
66 |
20.4692 |
19.9424 |
19.4272 |
|
67 |
19.7693 |
19.2537 |
18.7497 |
|
68 |
19.0966 |
18.5920 |
18.0990 |
|
69 |
18.4499 |
17.9562 |
17.4740 |
|
70 |
17.8282 |
17.3452 |
16.8735 |
|
71 |
17.2304 |
16.7578 |
16.2965 |
|
72 |
16.6554 |
16.1930 |
15.7419 |
|
73 |
16.1023 |
15.6499 |
15.2087 |
|
74 |
15.5702 |
15.1276 |
14.6961 |
|
75 |
15.0581 |
14.6251 |
14.2032 |
|
76 |
14.5652 |
14.1417 |
13.7291 |
|
77 |
14.0907 |
13.6764 |
13.2729 |
|
78 |
13.6339 |
13.2286 |
12.8341 |
|
79 |
13.1940 |
12.7976 |
12.4118 |
|
80 |
12.7703 |
12.3825 |
12.0053 |
|
81 |
12.3622 |
11.9828 |
11.6139 |
|
82 |
11.9689 |
11.5978 |
11.2372 |
|
83 |
11.5900 |
11.2270 |
10.8743 |
|
84 |
11.2247 |
10.8697 |
10.5248 |
|
85 |
10.8727 |
10.5254 |
10.1881 |
|
86 |
10.5332 |
10.1935 |
9.8637 |
|
87 |
10.2059 |
9.8736 |
9.5511 |
|
88 |
9.8902 |
9.5652 |
9.2499 |
|
89 |
9.5858 |
9.2678 |
8.9594 |
|
90 |
9.2920 |
8.9809 |
8.6794 |
|
91 |
9.0085 |
8.7042 |
8.4094 |
|
92 |
8.7350 |
8.4373 |
8.1489 |
|
93 |
8.4710 |
8.1797 |
7.8977 |
|
94 |
8.2161 |
7.9312 |
7.6554 |
|
95 |
7.9700 |
7.6912 |
7.4215 |
|
96 |
7.7324 |
7.4596 |
7.1958 |
|
97 |
7.5029 |
7.2360 |
6.9780 |
|
98 |
7.2812 |
7.0201 |
6.7677 |
|
99 |
7.0670 |
6.8115 |
6.5647 |
|
100 |
6.8601 |
6.6101 |
6.3686 |
|
101 |
6.6601 |
6.4155 |
6.1793 |
|
102 |
6.4668 |
6.2274 |
5.9964 |
|
103 |
6.2799 |
6.0457 |
5.8197 |
|
104 |
6.0993 |
5.8701 |
5.6489 |
|
105 |
5.9246 |
5.7003 |
5.4839 |
|
106 |
5.7557 |
5.5362 |
5.3245 |
|
107 |
5.5923 |
5.3775 |
5.1703 |
|
108 |
5.4343 |
5.2240 |
5.0213 |
|
109 |
5.2814 |
5.0755 |
4.8772 |
|
110 |
5.1334 |
4.9319 |
4.7379 |
|
111 |
4.9903 |
4.7930 |
4.6031 |
|
112 |
4.8517 |
4.6586 |
4.4727 |
|
113 |
4.7175 |
4.5285 |
4.3466 |
|
114 |
4.5877 |
4.4026 |
4.2245 |
|
115 |
4.4619 |
4.2807 |
4.1064 |
|
116 |
4.3401 |
4.1627 |
3.9921 |
|
117 |
4.2222 |
4.0484 |
3.8815 |
|
118 |
4.1079 |
3.9378 |
3.7743 |
|
119 |
3.9972 |
3.8306 |
3.6706 |
|
120 |
3.8900 |
3.7268 |
3.5702 |
|
121 |
3.7861 |
3.6263 |
3.4729 |
|
122 |
3.6854 |
3.5289 |
3.3787 |
|
123 |
3.5877 |
3.4345 |
3.2874 |
|
124 |
3.4931 |
3.3430 |
3.1990 |
|
125 |
3.4014 |
3.2543 |
3.1133 |
|
126 |
3.3124 |
3.1683 |
3.0302 |
|
127 |
3.2261 |
3.0850 |
2.9497 |
|
128 |
3.1424 |
3.0042 |
2.8717 |
|
129 |
3.0613 |
2.9258 |
2.7960 |
|
130 |
2.9825 |
2.8498 |
2.7227 |
|
131 |
2.9061 |
2.7761 |
2.6515 |
|
132 |
2.8320 |
2.7045 |
2.5826 |
|
133 |
2.7601 |
2.6352 |
2.5157 |
|
134 |
2.6902 |
2.5678 |
2.4507 |
|
135 |
2.6225 |
2.5025 |
2.3878 |
|
136 |
2.5567 |
2.4391 |
2.3267 |
|
137 |
2.4928 |
2.3775 |
2.2674 |
|
138 |
2.4308 |
2.3178 |
2.2098 |
|
139 |
2.3705 |
2.2598 |
2.1540 |
|
140 |
2.3120 |
2.2034 |
2.0997 |
|
141 |
2.2552 |
2.1487 |
2.0471 |
|
142 |
2.2000 |
2.0956 |
1.9960 |
|
143 |
2.1463 |
2.0440 |
1.9463 |
|
144 |
2.0942 |
1.9939 |
1.8981 |
|
145 |
2.0436 |
1.9452 |
1.8513 |
|
146 |
1.9943 |
1.8978 |
1.8058 |
|
147 |
1.9465 |
1.8518 |
1.7616 |
|
148 |
1.9000 |
1.8071 |
1.7187 |
|
149 |
1.8547 |
1.7637 |
1.6770 |
|
150 |
1.8108 |
1.7215 |
1.6364 |
|
151 |
1.7680 |
1.6804 |
1.5970 |
|
152 |
1.7264 |
1.6405 |
1.5587 |
|
153 |
1.6860 |
1.6017 |
1.5215 |
|
154 |
1.6467 |
1.5640 |
1.4853 |
|
155 |
1.6084 |
1.5273 |
1.4501 |
|
156 |
1.5712 |
1.4915 |
1.4158 |
|
157 |
1.5349 |
1.4568 |
1.3825 |
|
158 |
1.4997 |
1.4230 |
1.3501 |
|
159 |
1.4654 |
1.3901 |
1.3186 |
|
160 |
1.4320 |
1.3582 |
1.2880 |
|
161 |
1.3995 |
1.3270 |
1.2582 |
|
162 |
1.3678 |
1.2967 |
1.2292 |
|
163 |
1.3370 |
1.2672 |
1.2009 |
|
164 |
1.3070 |
1.2385 |
1.1734 |
|
165 |
1.2778 |
1.2106 |
1.1467 |
|
166 |
1.2494 |
1.1833 |
1.1207 |
|
167 |
1.2217 |
1.1568 |
1.0953 |
|
168 |
1.1947 |
1.1310 |
1.0706 |
|
169 |
1.1684 |
1.1059 |
1.0466 |
|
170 |
1.1428 |
1.0814 |
1.0232 |
|
171 |
1.1179 |
1.0576 |
1.0004 |
|
172 |
1.0935 |
1.0343 |
0.9782 |
|
173 |
1.0698 |
1.0117 |
0.9566 |
|
174 |
1.0467 |
0.9896 |
0.9355 |
|
175 |
1.0242 |
0.9681 |
0.9150 |
|
176 |
1.0023 |
0.9472 |
0.8950 |
|
177 |
0.9809 |
0.9268 |
0.8756 |
|
178 |
0.9601 |
0.9069 |
0.8566 |
|
179 |
0.9397 |
0.8875 |
0.8381 |
|
180 |
0.9199 |
0.8686 |
0.8200 |
|
181 |
0.9006 |
0.8501 |
0.8024 |
|
182 |
0.8817 |
0.8321 |
0.7853 |
|
183 |
0.8633 |
0.8146 |
0.7686 |
|
184 |
0.8454 |
0.7975 |
0.7523 |
|
185 |
0.8279 |
0.7808 |
0.7364 |
|
186 |
0.8108 |
0.7646 |
0.7209 |
|
187 |
0.7941 |
0.7487 |
0.7058 |
|
188 |
0.7779 |
0.7332 |
0.6911 |
|
189 |
0.7620 |
0.7181 |
0.6767 |
|
190 |
0.7465 |
0.7034 |
0.6627 |
|
191 |
0.7314 |
0.6890 |
0.6490 |
|
192 |
0.7166 |
0.6749 |
0.6356 |
|
193 |
0.7022 |
0.6612 |
0.6226 |
|
194 |
0.6882 |
0.6479 |
0.6099 |
|
195 |
0.6744 |
0.6348 |
0.5975 |
|
196 |
0.6610 |
0.6221 |
0.5853 |
|
197 |
0.6479 |
0.6096 |
0.5735 |
|
198 |
0.6351 |
0.5975 |
0.5620 |
|
199 |
0.6227 |
0.5856 |
0.5507 |
|
200 |
0.6105 |
0.5740 |
0.5397 |
|
201 |
0.5985 |
0.5627 |
0.5290 |
|
202 |
0.5869 |
0.5517 |
0.5185 |
|
203 |
0.5755 |
0.5409 |
0.5082 |
|
204 |
0.5644 |
0.5303 |
0.4982 |
|
205 |
0.5536 |
0.5200 |
0.4884 |
|
206 |
0.5430 |
0.5099 |
0.4789 |
|
207 |
0.5326 |
0.5001 |
0.4696 |
|
208 |
0.5225 |
0.4905 |
0.4604 |
|
209 |
0.5126 |
0.4811 |
0.4515 |
|
210 |
0.5029 |
0.4719 |
0.4428 |
|
211 |
0.4934 |
0.4630 |
0.4343 |
|
212 |
0.4842 |
0.4542 |
0.4260 |
|
213 |
0.4751 |
0.4456 |
0.4179 |
|
214 |
0.4663 |
0.4372 |
0.4100 |
|
215 |
0.4576 |
0.4290 |
0.4022 |
|
216 |
0.4492 |
0.4210 |
0.3946 |
|
217 |
0.4409 |
0.4132 |
0.3872 |
|
218 |
0.4328 |
0.4055 |
0.3800 |
|
219 |
0.4249 |
0.3980 |
0.3729 |
|
220 |
0.4171 |
0.3907 |
0.3660 |
|
221 |
0.4096 |
0.3836 |
0.3592 |
|
222 |
0.4021 |
0.3765 |
0.3525 |
|
223 |
0.3949 |
0.3697 |
0.3461 |
|
224 |
0.3878 |
0.3630 |
0.3397 |
|
225 |
0.3809 |
0.3564 |
0.3335 |
|
226 |
0.3741 |
0.3500 |
0.3274 |
|
227 |
0.3674 |
0.3437 |
0.3215 |
|
228 |
0.3609 |
0.3376 |
0.3157 |
|
229 |
0.3545 |
0.3315 |
0.3100 |
|
230 |
0.3483 |
0.3257 |
0.3045 |
|
231 |
0.3422 |
0.3199 |
0.2990 |
|
232 |
0.3362 |
0.3142 |
0.2937 |
|
233 |
0.3304 |
0.3087 |
0.2885 |
|
234 |
0.3246 |
0.3033 |
0.2834 |
|
235 |
0.3190 |
0.2980 |
0.2784 |
|
236 |
0.3135 |
0.2928 |
0.2735 |
|
237 |
0.3081 |
0.2878 |
0.2687 |
|
238 |
0.3029 |
0.2828 |
0.2640 |
|
239 |
0.2977 |
0.2779 |
0.2594 |
|
240 |
0.2927 |
0.2732 |
0.2549 |
|
241 |
0.2877 |
0.2685 |
0.2505 |
|
242 |
0.2829 |
0.2639 |
0.2462 |
|
243 |
0.2781 |
0.2594 |
0.2420 |
|
244 |
0.2734 |
0.2550 |
0.2379 |
|
245 |
0.2689 |
0.2507 |
0.2338 |
|
246 |
0.2644 |
0.2465 |
0.2298 |
|
247 |
0.2600 |
0.2424 |
0.2259 |
|
248 |
0.2557 |
0.2384 |
0.2221 |
|
249 |
0.2515 |
0.2344 |
0.2184 |
|
250 |
0.2474 |
0.2305 |
0.2148 |
|
251 |
0.2433 |
0.2267 |
0.2112 |
|
252 |
0.2394 |
0.2230 |
0.2077 |
|
253 |
0.2355 |
0.2193 |
0.2042 |
|
254 |
0.2317 |
0.2157 |
0.2009 |
|
255 |
0.2279 |
0.2122 |
0.1976 |
|
256 |
0.2243 |
0.2088 |
0.1943 |
|
257 |
0.2207 |
0.2054 |
0.1911 |
|
258 |
0.2172 |
0.2021 |
0.1880 |
|
259 |
0.2137 |
0.1988 |
0.1850 |
|
260 |
0.2103 |
0.1957 |
0.1820 |
|
261 |
0.2070 |
0.1925 |
0.1791 |
|
262 |
0.2037 |
0.1895 |
0.1762 |
|
263 |
0.2005 |
0.1865 |
0.1734 |
|
264 |
0.1974 |
0.1835 |
0.1706 |
|
265 |
0.1943 |
0.1806 |
0.1679 |
|
266 |
0.1913 |
0.1778 |
0.1652 |
|
267 |
0.1884 |
0.1750 |
0.1626 |
|
268 |
0.1855 |
0.1723 |
0.1601 |
|
269 |
0.1826 |
0.1696 |
0.1575 |
|
270 |
0.1798 |
0.1670 |
0.1551 |
|
271 |
0.1771 |
0.1644 |
0.1527 |
|
272 |
0.1744 |
0.1619 |
0.1503 |
|
273 |
0.1717 |
0.1594 |
0.1480 |
|
274 |
0.1691 |
0.1570 |
0.1457 |
|
275 |
0.1666 |
0.1546 |
0.1435 |
|
276 |
0.1641 |
0.1522 |
0.1413 |
|
277 |
0.1616 |
0.1499 |
0.1391 |
|
278 |
0.1592 |
0.1477 |
0.1370 |
|
279 |
0.1568 |
0.1455 |
0.1349 |
|
280 |
0.1545 |
0.1433 |
0.1329 |
|
281 |
0.1522 |
0.1412 |
0.1309 |
|
282 |
0.1500 |
0.1391 |
0.1289 |
|
283 |
0.1478 |
0.1370 |
0.1270 |
|
284 |
0.1456 |
0.1350 |
0.1251 |
|
285 |
0.1435 |
0.1330 |
0.1232 |
|
286 |
0.1414 |
0.1310 |
0.1214 |
|
287 |
0.1394 |
0.1291 |
0.1196 |
|
288 |
0.1374 |
0.1272 |
0.1179 |
|
289 |
0.1354 |
0.1254 |
0.1161 |
|
290 |
0.1335 |
0.1236 |
0.1144 |
|
291 |
0.1316 |
0.1218 |
0.1128 |
|
292 |
0.1297 |
0.1201 |
0.1111 |
|
293 |
0.1279 |
0.1183 |
0.1095 |
|
294 |
0.1260 |
0.1166 |
0.1079 |
|
295 |
0.1243 |
0.1150 |
0.1064 |
|
296 |
0.1225 |
0.1134 |
0.1049 |
|
297 |
0.1208 |
0.1118 |
0.1034 |
|
298 |
0.1191 |
0.1102 |
0.1019 |
|
299 |
0.1175 |
0.1086 |
0.1005 |
|
300 |
0.1158 |
0.1071 |
0.0990 |
|
301 |
0.1142 |
0.1056 |
0.0976 |
|
302 |
0.1127 |
0.1042 |
0.0963 |
|
303 |
0.1111 |
0.1027 |
0.0949 |
|
304 |
0.1096 |
0.1013 |
0.0936 |
|
305 |
0.1081 |
0.0999 |
0.0923 |
|
306 |
0.1067 |
0.0985 |
0.0910 |
|
307 |
0.1052 |
0.0972 |
0.0898 |
|
308 |
0.1038 |
0.0959 |
0.0885 |
|
309 |
0.1024 |
0.0946 |
0.0873 |
|
310 |
0.1010 |
0.0933 |
0.0861 |
|
311 |
0.0997 |
0.0920 |
0.0850 |
|
312 |
0.0983 |
0.0908 |
0.0838 |
|
313 |
0.0970 |
0.0896 |
0.0827 |
|
314 |
0.0958 |
0.0884 |
0.0816 |
|
315 |
0.0945 |
0.0872 |
0.0805 |
|
316 |
0.0933 |
0.0860 |
0.0794 |
|
317 |
0.0920 |
0.0849 |
0.0783 |
|
318 |
0.0908 |
0.0838 |
0.0773 |
|
319 |
0.0897 |
0.0827 |
0.0763 |
|
320 |
0.0885 |
0.0816 |
0.0752 |
|
321 |
0.0874 |
0.0805 |
0.0743 |
|
322 |
0.0862 |
0.0795 |
0.0733 |
|
323 |
0.0851 |
0.0785 |
0.0723 |
|
324 |
0.0840 |
0.0775 |
0.0714 |
|
325 |
0.0830 |
0.0765 |
0.0704 |
|
326 |
0.0819 |
0.0755 |
0.0695 |
|
327 |
0.0809 |
0.0745 |
0.0686 |
|
328 |
0.0799 |
0.0736 |
0.0678 |
|
329 |
0.0788 |
0.0726 |
0.0669 |
|
330 |
0.0779 |
0.0717 |
0.0660 |
|
331 |
0.0769 |
0.0708 |
0.0652 |
|
332 |
0.0759 |
0.0699 |
0.0644 |
|
333 |
0.0750 |
0.0690 |
0.0635 |
|
334 |
0.0741 |
0.0682 |
0.0627 |
|
335 |
0.0731 |
0.0673 |
0.0620 |
|
336 |
0.0722 |
0.0665 |
0.0612 |
|
337 |
0.0714 |
0.0657 |
0.0604 |
|
338 |
0.0705 |
0.0649 |
0.0597 |
|
339 |
0.0696 |
0.0641 |
0.0589 |
|
340 |
0.0688 |
0.0633 |
0.0582 |
|
341 |
0.0680 |
0.0625 |
0.0575 |
|
342 |
0.0671 |
0.0617 |
0.0568 |
|
343 |
0.0663 |
0.0610 |
0.0561 |
|
344 |
0.0655 |
0.0603 |
0.0554 |
|
345 |
0.0648 |
0.0595 |
0.0547 |
|
346 |
0.0640 |
0.0588 |
0.0541 |
|
347 |
0.0632 |
0.0581 |
0.0534 |
|
348 |
0.0625 |
0.0574 |
0.0528 |
|
349 |
0.0618 |
0.0567 |
0.0521 |
|
350 |
0.0610 |
0.0561 |
0.0515 |
