Thermistor conversion table, Temperature versus resistance – PASCO TD-8558A THERMAL EXPANSION APPARATUS User Manual
Page 9
012-04394C
Thermal Expansion Apparatus
5
Res.
Temp.
(
Ω)
(
°
C)
Res. Temp.
(
Ω)
(
°
C)
Res. Temp.
(
Ω)
(
°
C)
Res.
Temp.
(
Ω)
(
°
C)
351,020
0
332,640
1
315,320
2
298,990
3
283,600
4
269,080
5
255,380
6
242,460
7
230,260
8
218,730
9
207,850
10
197,560
11
187,840
12
178,650
13
169,950
14
161,730
15
153,950
16
146,580
17
139,610
18
133,000
19
126,740
20
120,810
21
115,190
22
109,850
23
104,800
24
100,000
25
95,447
26
91,126
27
87,022
28
83,124
29
79,422
30
75,903
31
72,560
32
69,380
33
66,356
34
63,480
35
60,743
36
58,138
37
55,658
38
53,297
39
51,048
40
48,905
41
46,863
42
44,917
43
43,062
44
41,292
45
39,605
46
37,995
47
36,458
48
34,991
49
33,591
50
32,253
51
30,976
52
29,756
53
28,590
54
27,475
55
26,409
56
25,390
57
24,415
58
23,483
59
22,590
60
21,736
61
20,919
62
20,136
63
19,386
64
18,668
65
17,980
66
17,321
67
16,689
68
16,083
69
15,502
70
14,945
71
14,410
72
13,897
73
13,405
74
12,932
75
12,479
76
12,043
77
11,625
78
11,223
79
10,837
80
10,467
81
10,110
82
9,767.2
83
9,437.7
84
9,120.8
85
8,816.0
86
8,522.7
87
8,240.6
88
7,969.1
89
7,707.7
90
7,456.2
91
7,214.0
92
6,980.6
93
6,755.9
94
6,539.4
95
6,330.8
96
6,129.8
97
5,936.1
98
5,749.3
99
5,569.3
100
THERMISTOR CONVERSION TABLE:
Temperature versus Resistance
➁ Calculate
∆
T = T
hot
– T
rm
. Record the result in the table.
➂ Using the equation
∆
L =
α
L
∆
T, calculate a for copper, steel, and aluminum.
α
Cu
=
__________________
α
steel
=
__________________
α
Al
=
__________________
Questions
➀ Look up the accepted values for the linear expansion coefficient for copper, steel, and
aluminum. Compare these values with your experimental values. What is the percentage
difference in each case? Is your experimental error consistently high or low?
➁ On the basis of your answers in question 1, speculate on the possible sources of error in
your experiment. How might you improve the accuracy of the experiment?
➂ From your result, can you calculate the coefficients of volume expansion for copper,
aluminum, and steel? (i.e.
∆
V =
α
vol
V
∆
T)