Operation
22
Testboy
®
TV 292
Date and Time
In the menu Set date and time, the date and time can be set.
Using
,
call up the main menu and, using
, select the menu for setting the date and time. Subsequently,
press
in order to call up the time interface and, using the buttons
and
, set the date and time.
Using
, the indicated value can be changed. Using
, you can exit this menu.
1
Year
2
Month
3
Day
4
Hour
5
Minute
Emissivity
Using
, call up the main menu and, using
, select the degree of emission module. In order to set the
degree of emission, press
and then, using
,
select the value required.
Using
, you can exit the selection.
Notes
Infra-red energy is radiated from all objects. How much energy is radiated depends on the actual surface
temperature and the degree of emission at the surface. The measuring instrument records the infra-red energy
radiated from the surface and, based on this data, calculates an approximate temperature value. Many objects and
materials frequently occurring, for example, painted metal, wood, water, skin and fabric, radiates energy very good
and readily enables very good measurements. For surfaces that feature good radiation characteristics (a high
degree of emission), the degree of emission is
≥
90 % (0.90). Shiny surfaces or unpainted metals only have
a degree of emission of < 60 % (0.60). These materials do not have good radiation characteristics and, thus,
only a low emissivity. In order to be able to more accurately measure materials with low emissivity, the degree of
emissions must be accordingly corrected. By adapting the degree of emission, the actual temperature can normally
be calculated more accurately.
