1
2
Element Function
1 Display Shows infrared and real images, menus and
functions
2 Interface terminal Includes micro USB interface for power supply
and connection to a computer
3
- button
- Esc button
- Switch camera on and off
- Cancel action
4 - OK button
- Joystick
- Open menu, select function, confirm setting
- Navigate in menu, select function, select
colour palette
5 Quick select button
Opens the function assigned to the quick se-
lect button; the icon for the selected function
is shown at the bottom right of the display
6 Infrared camera lens;
protective cap
Takes infrared images; protects the lens
7 Digital camera (only
testo 870-2)
Takes real images
8 Trigger Saves the displayed image
9 Battery compartment Contains the battery
Switching the camera on/off
1 - Remove the protective cap from the lens (6).
2
- Switching on: press (3).
- Switching off: press and hold down (3).
To ensure measuring accuracy, the camera performs automatic
zeroing approx. every 60 s. You will hear a "click", and the images
freezes briefly.
Navigating the menu
1 - Press OK (4) to open the menu.
2 - Move the Joystick (4) up/down to select a function (an orange
box appears around it).
3 - Press OK (4) to select the function.
3.1 - Move the Joystick (4) right to open the sub-menu (indicated with ►).
Saving an image
1 - Press the Trigger (8).
The infrared image is saved automatically.
Only testo 870-2: irrespective of the selected image type, an infra-
red image is always saved with the attached real image.
If a higher resolution is required: In the menu under Configuration,
select the function SuperResolution (optional function).
@ More information can be found in the instruction manual.
Displaying and deleting images
1 - Select the Image gallery function. For how to do this, see Navi-
gating the menu.
2 - Displaying an image: move the Joystick (4) left/right/up/down to
select the image, then press OK (4).
3
- Press (5) to delete the image.
Setting the emission level
testo 870-2: function only available if the Image type infrared has been
selected.
The emission level describes the capability of a body to emit ther-
mal radiation. For correct measurement results, the emission level
can be set according to the specific material.
1 - Select the Emission level function. For how to do this, see Famil-
iarising yourself with the menu.
2 - Move the Joystick (4) up/down to select the required material,
then press OK (4).
RTC (Reflected Temperature Compensation) is a correction value
for thermal radiation through other objects. If objects with a much
higher/lower temperature are in the proximity of the object to be
measured, the irradiated temperature value must be entered. If this
is not the case, the ambient temperature can be entered.
@ More information can be found in the instruction manual and the
Pocket Guide.
Setting measurements
testo 870-2: function only available if the Image type infrared has been
selected.
1 - Open the Measurement sub-menu. For how to do this, see Navi-
gating the menu.
The sub-menu with the measurements opens:
• Single point measurement: the temperature measuring point
in the centre of the image is highlighted with white crosshairs
and the value is displayed. In the case of saved images, the
crosshairs can be moved using the joystick to read off the value
for other measuring points.
• Coldspot, Hotspot: the lowest or highest temperature measur-
ing point is highlighted with blue or red crosshairs and the value
is displayed.
• Measurement range: the temperature range in which measur-
ing values are displayed (for information purposes).
2 - Move the Joystick (4) up/down to select the required function,
then press OK (4).
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