User's Manual
2
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.
NOTE: For best results, a digital ohmmeter
should be used. (See the current PASCO catalog
for recommended meters.)
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!
C
A
U
T
I
O
N
H
O
T
!
THERM
IST
OR
M
o
d
e
l
T
D
-8
5
5
4
A
(
L
E
S
L
I
E
'S
C
U
B
E
)
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