Calex Thermosight GL Manual do utilizador - Página 9
Procurar online ou descarregar pdf Manual do utilizador para Instrumentos de medição Calex Thermosight GL. Calex Thermosight GL 19 páginas. Hand held infrared pyrometer
Imprimir página3.4. Spot size
The size of the spot depends on the distance to the target object.
Spotdiameter
Measuring
Distance
The spot diameter for distances longer than 650 mm can be calculated
according to the following formula:
M = 0 .05 * a - 20
M - Diameter of the spot
a - Distance between targeted object an instrument
The close-up lens (accessory) reduces the spot diameter to 2.3 mm at a
distance of 96 mm.
Then the emissivity
(with
Object
= 0.72 *
Spotdiameter
Measuring
Distance
When using the close-up lens the spot diameter for distances larger than
96 mm can be calculated according to the following formula:
M = 0.23* a - 20
M - Diameter of the spot
a - Distance between targeted object and instrument
20 mm
17.5 mm
0 mm
350 mm
has to be set according to the following formula:
= the real objects emissivity)
Object
20 mm
11 mm
0 mm
50 mm
(all values in mm)
13 mm
650 mm
(all values in mm)
2.3 mm
96 mm
8
80 mm
2000 mm
24 mm
200 mm