TESTO 115i Instruction Manual page 10

Select "AC + Refrigeration"
2.9.3
Smart Probes: 2x t115i, 2x t549i
Optional: t605i, t905i
Select "Target Superheat"
2.9.4
Smart Probes: 2x t115i, 2x t549i
! Please only use this menu for ducted split system air conditioners/ heat
pumps that do not have a thermostatic expansion valve (TXVs)!
1. Press and select Edit view

Press to select Low-pressure and high-pressure probe
t549i as well as t115i Clamp Thermometers in order to
calculate superheating (tcu) and sub-cooling (toh)

Once chosen, the probes will be saved as selected for next
measurements

Stick the delivered blue and red sticker on the t549i to identify
them as High- or Low-pressure probes

Press on the right to select the refrigerant that is used for
calculation

Superheat and sub-cooling are automatically calculated
2. Press and select Pressure setting

Set your ambient pressure to calculate the right reference
value for an accurate measurement
3. Press and select Zero pressure sensor
pressure sensor of t549i (also for t510i).
 Please make sure that all connections are at ambient pressure
before zeroing. Make sure to zero the sensor before measuring!
4. Press and Set surface compensation
measuring accuracy of surface temperature readings.
 For penetration or air temperature measurements please
deactivate the factor.
1. Press and select Edit view
2. Select Configure measurement

Settings Target Superheat
= manual
Setting of ODDB (outdoor dry bulb) temperature
and RAWB (return air wet bulb) temperature.
 This is necessary in order to calculate the Target
Superheat temperature

Superheat, sub-cooling, and target superheat are
automatically calculated in the app
3. Press and select Pressure setting
4. Press and select Zero pressure sensor
Refrigeration"
5. Select Set surface compensation
6. The calculated target superheat is shown as a
gauge control
for t549i (also for t510i)
in order to zero the
factor to improve the
 see "AC + Refrigeration"
 see "AC + Refrigeration"
 see "AC +
 see "AC + Refrigeration"