geo-FENNEL FIRT 1600 Data Mode D'emploi page 18

EN
EMISSIVITY
The emissivity is a term used to describe the energy-emitting characteristics of a material. Most
(90 % of the typical applications) organic materials and painted or oxidized surfaces have an emissivity
of 0,95 (pre-set in the unit). Inaccurate reading will result from measuring shiny or polished metal sur-
faces. To compensate, cover the surface to be measured with a masking tape.
The setting of the appropriate emissivity for the object to be measured will increase the accuracy of the
measuring result.
MATERIAL
Asphalt
Brick
Cement
Ceramic
Charcoal
Chromium ox.
Cloth (black)
Concrete
Copper ox.
Earth
Glass
Human skin
Iron ox.
Lacquer
MEASUREMENTS
Aim at the target to be measured and pull and hold the trigger. By pulling the trigger the instrument au-
tomatically powers on. The dual laser spots will show the measuring target (if the laser is powered on).
The temperature measured will be displayed; during the measuring process SCAN will be displayed.
When the trigger is released the temperature measured will be displayed for another 7 sec.; HOLD will
be displayed. If the trigger is not used for 7 sec. the instrument will automatically power off.
If the measuring range is exceeded -> „---" will be displayed.
Note:
Have the instrument adapted to the ambient temperature if it is taken to a new location. If extended
measurements of high temperatures are carried out the measuring distance should be longer as high
temperatures will heat up the instrument and lead to inaccurate results.
18
EMISSIVITY
0,90 – 0,98
0,93 – 0,96
0,96
0,90 – 0,94
0,96
0,81
0,98
0,94
0,78
0,92 – 0,96
0,90 – 0,94
0,98
0,78 – 0,82
0,80 – 0,95
MATERIAL EMISSIVITY
Lacquer 0,97 (non-shiny)
Lather 0,75 – 0,80
Marble 0,94
Mortar 0,89 – 0,91
Paper 0,70 – 0,94
Plaster 0,80 – 0,90
Plastic 0,85 – 0,95
Rubber (black) 0,94
Sand 0,90
Textiles 0,90
Timber 0,90
Snow 0,83
Water 0,92 – 0,96