User's Manual

3 Description of the instrument
9
3.4
Control keys overview
Element Function
1
- Switches to the settings.
- Switches between the set-up options.
(This function is disabled, when connected to the
App with BT)
2
Switches the display illumination on or off.
3
Switches the instrument on or off.
4
- Switches between the temperature displays.
- Navigates in the Set menu.
5
+
Switches Bluetooth® on or off (press and hold down
for 3 sec.)
3.5
Connection options overview
In regard to the following connection options, the testo 570 is used to
represent any manifold and can use the testo 552 as a probe via a
MiniDIN connecting cable (see Option 2).