TESTO 557s - Page 16

8 Using the product
16
3
Select Refrigeration and press
[Menu/Enter] to confirm.
-
The measurement menu is displayed.
4
Connect the refrigerant hoses.
4.1
Close the valve positioners.
4.2
Connect the refrigerant hoses for low-pressure side (blue) and high-
pressure side (red) to the measuring instrument.
4.3
Connect the refrigerant hoses to the system.
5
Connect testo 115i or fixed cable probes.