Thermal radiation cube (leslie’s cube), Caution: cube may be hot – PASCO TD-8555 THERMAL RADIATION SYSTEM User Manual
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Thermal Radiation System
012-04695D
Thermal Radiation Cube (Leslie’s Cube)
The TD-8554A Radiation Cube (Figure 2) provides
four different radiating surfaces that can be heated
from room temperature to approximately 120 °C. The
cube is heated by a 100 watt light bulb. Just plug in
the power cord, flip the toggle switch to “ON”, then
turn the knob clockwise to vary the power.
Measure the cube temperature by plugging your
ohmmeter into the banana plug connectors labeled
THERMISTOR. The thermistor is embedded in one
corner of the cube. Measure the resistance, then use
Table 1, below, to translate the resistance reading into a
temperature measurement. An abbreviated version of
this table is printed on the base of the Radiation Cube.
ä NOTE: For best results, a digital ohmmeter
should be used. (See the current PASCO catalog
for recommended meters.)
ä IMPORTANT: When replacing the light
bulb, use a 100-Watt bulb. Bulbs of higher
power could damage the cube.
CAUTION: Cube may be HOT!
Figure 2 Radiation Cube (Leslie's Cube)
1
2
3
4
5
6
7
8
LOW
HIGH
CAUTION: HOT!
CA
UT
IO
N
HO
T!
THERM
IST
OR
Mo
del
TD
-85
54A
(LE
SL
IE'S
CU
BE
)
100W
BULB
MAX.
ON
OFF
Turn knob
clockwise to
increase
temperature.
Flip toggle
switch to
“ON” to turn
on power.
Banana
Connectors:
Measure
thermistor
resistance.
Use table on
back to
determine
cube
temperature.
To 115
or
200
VAC
4,615.1
106
4,475.0
107
4,339.7
108
4,209.1
109
4,082.9
110
3,961.1
111
3,843.4
112
3,729.7
113
3,619.8
114
3,513.6
115
3,411.0
116
3,311.8
117
3,215.8
118
3,123.0
119
3,033.3
120
2,946.5
121
2,862.5
122
2,781.3
123
2,702.7
124
2,626.6
125
2,553.0
126
2,481.7
127
2,412.6
128
2,345.8
129
Therm.
Temp.
Res. (
Ω
)
(°C)
Therm.
Temp.
Res. (
Ω
)
(°C)
Therm.
Temp.
Res. (
Ω
)
(°C)
Therm.
Temp.
Res. (
Ω
)
(°C)
Therm.
Temp.
Res. (
Ω
)
(°C)
Therm.
Temp.
Res. (
Ω
)
(°C)
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
5,395.6
101
5,228.1
102
5,066.6
103
4,910.7
104
4,760.3
105
2,281.0
130
2,218.3
131
2,157.6
132
2,098.7
133
2,041.7
134
1,986.4
135
1,932.8
136
1,880.9
137
1,830.5
138
1,781.7
139
1,734.3
140
1,688.4
141
1,643.9
142
1,600.6
143
1,558.7
144
1,518.0
145
1,478.6
146
1,440.2
147
1,403.0
148
1,366.9
149
1,331.9
150
Table 1
Resistance versus Temperature for the Thermal Radiation Cube