Cyclops 160B
User Guide
Page 32
11.2 Practical determination of Emissivity value
For many applications, such as metal alloys, it is not possible to specify a
fixed emissivity value. In such instances, it is possible to make an in-situ,
practical determination of the required emissivity setting by comparison with
a reference measurement such as a thermocouple reading.
The procedure for doing this is as follows:
1) Sight the thermometer onto the target surface at the chosen
measurement point. Allow the reading to stabilise and release the
trigger to freeze the readings on the side display.
Note:
Do not touch the trigger again until the procedure has been
finished.
2) Using a thermocouple or reference instrument, measure the temperature
at the target location.
3) Press the
Select
key
to go into the
Menu
mode, press the
Down
arrow key
to select the
e
setting and press the
Select
key
to
select this option.
4) The screen will display the current emissivity value.
5) Use the
Up
and
Down
keys to change the emissivity value. The
temperature reading will change to indicate the value that would have
been obtained at the new emissivity setting.
6) Continue adjusting the emissivity value up or down until the displayed
temperature agrees as closely as possible to the reference temperature.
7) Press the
Select
key
to store the new emissivity value, press the
Up
arrow key to return to the
Exit
icon and press the
Select
key
to
return to
Measure
mode.
All subsequent readings will now use the new emissivity set point.
Note that the new emissivity value will be stored at switch-off.