User manual

o Coldspot, hotspot: the lowest or highest temperature
measuring point is marked with blue or red crosshairs and
the value is displayed.
• Min/Max on Area (testo 872): the minimum, maximum and
mean values for a selected area are displayed.
• Measurement range: temperature range in which measuring
values are displayed (for information).
• Differential temperature: identifies the difference between two
temperatures.
2 - Move joystick (4) up/down to highlight the required function, then
press OK (4).
Selecting the colour palette
Function is only available if the infrared image type has been selected.
1 - Move joystick (4) up/down to toggle between the colour palettes.
Selecting image type (infrared image, real image) (testo 868, 871 and 872)
1 - Select image type function. To do this, see Getting to know the
menu.

The image type switches automatically from infrared image to real
image and vice versa.
Setting the scale
Function is only available if the infrared image type has been selected.
Automatic scaling continuously adjusts the scale to the relevant
measuring values and the colour assigned to a measuring value
changes.
With manual scaling, fixed limit values are defined and the colour
assigned to a measuring value is fixed (important for visual image
comparisons).
Scaling influences the way the infrared image is shown on the display
but does not affect the recorded measuring values.
A standardized scale is set via ScaleAssist depending on the inside
and outside temperature.
1 - Select the scale function. To do this, see Getting to know the
menu.