TESTO 570 Series Instruction Manual page 30

7 Using the product

The Target Superheat
measurement menu is displayed.
7
Connect the refrigerant hoses.
7.1
Close the valve positioners.
7.2
Connect the refrigerant hoses for low-pressure side (blue) and high-
pressure side (red) to the measuring instrument.
7.3
Connect the refrigerant hoses to the system.
8
Connect testo 115i/fixed cable probes.
9
Set refrigerant.
Press the key [▼] (Rxx) (refrigerant number according to ISO 817).
9.1

The refrigerant menu opens and the
current refrigerant is highlighted.
9.2
Setting the refrigerant: Press
[▼]
to select the refrigerant and
press [Menu/Enter]
30
[▲]
or
to confirm.