TESTO 570 Series - Page 18

7 Using the product
18
These can be fixed cable temperature probes or Testo Smart Probes
(e.g. testo 115i).
Before each measurement, check that the refrigerant hoses are in
flawless condition.
Before each measurement, zero the pressure sensors. All connections
must be pressureless (ambient pressure). Press the [▲] (P=O) key for
2 seconds to zero the sensors.
✓
The instrument is switched on and the measurement menu is
displayed.
✓
All connections must be pressureless (ambient pressure).
1
Press [Menu/Enter] to confirm.

The main menu is displayed.
2
Press [Menu/Enter] to confirm.
3
Select Refrigeration and press
[Menu/Enter] to confirm.