7
The PC-8400
Ⅱ
is shipped with the default emissivity set to 0.95.
All objects emit infrared radiation corresponding to their surface temperature and emissivity. Many foods
and plastics have emissivity of 0.95 and 0.95 is usable to measure these object.
If a more precise measurement of the surface temperatures is required, set the emissivity of the object by
referring to the emissivity table given below.
⚫
Setting the emissivity
Press the Scan key once and the Mode key five times in succession. Then, "95E" is displayed on the LCD,
showing that the emissivity is set to 0.95.
To change this value, press the Scan key. Every time you press the Scan key, the value on the LCD advances
by 1, representing an increase in emissivity of 0.01. When the desired emissivity is displayed on the LCD,
press the Mode key to fix the value. Then the new emissivity is set. You can set the emissivity in the range
of 0.05 through 1.00
Note
: The emissivity value on the LCD will go off if the automatic power-off function is activated
before pressing the Mode key, resulting in no change to the value.
The table below lists the typical materials with their emissivity. Note that the emissivity varies with the
temperature and surface condition of the object; the values are given for reference only.
1) Emissivity Table
The table below lists the typical emissivity (near 0.95) of different types of materials. (The values are
presented only for reference; the emissivity varies with the temperature and surface conditions of objects.)
Object
Emissivity
Object
Emissivity
Object
Emissivity
Meat
0.98
Grain
0.98
Skin
0.98
Fish
0.98
Oil
0.98
Water
0.92- 0.96
Vegetable
0.98
Plastic
0.95
Soil
0.92- 0.96
Bread
0.98
Rubber
0.95
Wood
0.98
Confectionery
0.98
Carbon
0.98
Paper
0.92
2) Emissivity Table
The table below lists materials whose emissivity is significantly different from 0.95.
Object
Emissivity
Object
Emissivity
Object
Emissivity
Iron
0.85
Brass
0.60
Ceramic
0.80
Cast iron
0.85
Tile
0.80
Nichrome
0.60
Aluminum
0.30
Asbestos
0.90
Glass
0.85
Cupper
0.80
Asphalt
0.85
