TESTO 550s - Delta T

8 Using the product
31
6.2
Setting the refrigerant: Press [▲] or
[▼] to select the refrigerant and
press [Menu/Enter] to confirm.
-
The newly set refrigerant is displayed in the refrigerant list.
7
Press the [▲] (P=O) key for 2 seconds to carry out zeroing.
-
Zeroing takes place.
8
Pressurize the measuring instrument.
-
The measurement starts automatically.
-
The measurement result is displayed.
9
Press [Menu/Enter] to return to the main menu.
8.2.6 Delta T
Temperature 1 and temperature 2 are measured. The difference is shown on
the display as the delta temperature.
Two testo 115i
(clamp thermometers) or fixed cable probes are used to
carry out the measurement.

The instrument is switched on and the measurement menu is
displayed.

The steps described in the Preparing for measurement section have
been followed/carried out.

testo 115i is switched on.
1
Place the testo 115i at the measuring points.
2
Press [Menu/Enter].