8 Using the product
25
8.2.4
Target Superheat
This feature makes it possible to connect the
testo 550s
and
testo 557s
manifolds to two additional
testo 605i
Smart Probes in order to calculate the
target superheat. This application can only be used for split air conditioning
systems/heat pumps with a fixed expansion valve. The two connected
testo
605i
Smart Probes determine the Outdoor Dry Bulb Temp (
ODDB)
and Return
Air Wet Bulb (
RAWB)
values. The target superheat value appears on the
display as a result.
The following are used for the measurement:
•
testo 115i
(clamp thermometer) or
•
fixed cable probes
•
testo 605i
Alternatively, the values can be configured manually.
Before each measurement, check that the refrigerant hoses are in
perfect condition.
Before each measurement, zero the pressure sensors.
The instrument is switched on and the measurement menu is
displayed.
All connections must be pressureless (ambient pressure).
Bluetooth
®
is enabled.
1
Press
[Menu/Enter]
.
2
Press
[▲] / [▼]
to select
Measuring
Mode
and press
[Menu/Enter]
to
confirm.
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