AEMC CA870, Руководство пользователя

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Infrared Thermometer Model CA870
4.3 Operating Instructions
1. Turn unit ON by pressing the yellow “MEAS” button.
2. Select °F or °C, by pressing the °F/°C button. The selected degree
type is displayed in the lower right hand corner of the LCD.
3. Infrared thermometer sensors need a certain time stabilize to ambient
temperature. Remember to let the IR meter reach ambient tempera-
ture if brought in from a different temperature environment.
4. Press the button to turn ON the back-light if needed.
5. The thermometer will continue measuring as long as the MEAS button
is pressed. When the button is released, the measurement will be held
in the display for approximately 20 seconds.
6. The IR thermometer will shut OFF automatically after approximately
20 seconds.
EMISSIVITY
All objects emit invisible infrared energy. The amount of IR energy emitted
is proportional to the object’s temperature and its natural ability to emit IR
energy. This ability, called emissivity, is based upon the object material type
and its surface finish. Emissivity values range from 0.10 for a very reflective
object to 1.00 for a black body. Factory set emissivity value of 0.95 will cover
90-95% of typical applications.
If frost or other material/substance covers the measured surface, clean it to
expose the surface. If the surface to be measured is highly reflective, apply
dull masking tape or matte black paint over the surface. If the thermometer
seems to be giving incorrect readings, check the front sensor. There may be
condensation or debris obstructing the sensor. Only clean per instructions.
Material Emmisivity Material Emmissivity
Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Human skin 0.98
Cement 0.96 Lather (Soap) 0.75 to 0.80
Sand 0.90 Charcoal (powder) 0.96
Earth 0.92 to 0.96 Lacquer 0.80 to 0.95
Water 0.92 to 0.96 Lacquer (matte) 0.97
Ice 0.96 to 0.98 Rubber (black) 0.94
Snow 0.83 Plastic 0.85 to 0.95
Glass 0.90 to 0.95 Timber 0.90
Ceramic 0.90 to 0.94 Paper 0.70 to 0.94
Marble 0.94 Chromium oxide 0.81
Plaster 0.80 to 0.90 Copper oxide 0.78
Mortar 0.89 to 0.91 Iron oxide 0.78 to 0.82
Brick (red) 0.93 to 0.96 Textiles 0.90