TESTO 400 Instruction Manual page 54

9 Operation
Clothing
Clothing reduces body heat losses and is therefore classified based on its
insulating value. The insulating effect of clothing is given in the unit clo or m²
K/W (1 clo = 0.155 m² K/W). The clo value can be calculated by adding together
the values of the individual items of clothing. Insulating values for individual
items of clothing can be found in ISO 7730. Alternatively, a range can be
selected.
Parameter in clo
0 to 0.02
0.03 to 0.29
0.30 to 0.49
0.50 to 0.79
0.80 to 1.29
1.30 to 1.79
1.80 to 2.29
2.30 to 2.79
2.80 to 3.00
Activity
The metabolic rate specifies the energy released by oxidation processes in the
human body, and depends on muscle activity. The metabolic rate is given in met
or W/m 2 (1 met = 58.2 W/m² body surface area). The average adult has a body
surface area of 1.7 m². In a state of thermal comfort, a person with a metabolic
rate of 1 met has heat loss of approx. 100 W. When calculating the metabolic
rate, a mean value of the activity of the relevant person within the past hour
must be used. Met values for various activities can also be found in ISO 7730.
Parameter in
met
0.1 to 0.7
0.8 to 0.9
1.0 to 1.1
1.2 to 1.5
1.6 to 1.7
1.8 to 1.9
2.0 to 2.3
2.4 to 2.9
3.0 to 3.4
3.5 to 4.0
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Parameter in m 2
K/W
0.005 to 0.045
0.046 to 0.077
0.078 to 0.122
0.123 to 0.200
0.201 to 0.277
0.278 to 0.355
0.356 to 0.432
0.433 to 0.465
Parameter in
W/m 2
6 to 45
46 to 57
58 to 59
70 to 92
93 to 104
105 to 115
116 to 139
140 to 174
175 to 203
204 - 233
Description
No clothing
Underwear
Shorts and T-shirt
Trousers and T-shirt
Light business wear
Warm business wear
Jacket or coat
Warm winter clothing
Extremely warm winter clothing
Description
Lying down, relaxed
Sitting down, relaxed
Seated activity
Standing
Standing up, light activity
Standing up, moderate activity
Slow walking
Quick walking
Strenuous activity
Extremely strenuous activity